High free calcium belite sulphoaluminate clinker and method of preparation, high strength water resistant frost resistant inorganic self-leveling material and applications

Abstract

The application relates to the technical field of building materials, and particularly discloses a high-free-calcium belite sulphoaluminate clinker, a preparation method thereof, a high-strength water-resistant and anti-freezing inorganic self-leveling material and application. The high-free-calcium belite sulphoaluminate clinker comprises the following mineral components in percentage by mass: anhydrous calcium sulphoaluminate 25.31%-33.27%, free calcium sulfate 6.55%-12.26%, free calcium oxide 14.82%-19.71%, belite 27.27%-33.87% and iron phase 3.04%-6.08%. The high-free-calcium belite sulphoaluminate clinker and granulated blast furnace slag powder can improve the types, composition and microstructure of the hydration products of the gypsum-based material, and can greatly increase the water-resistant and high-strength hydration products of ettringite and C-(A)-S-H, and meanwhile, the two can realize dense coating of dihydrate gypsum, so that the problems of poor water resistance, poor frost resistance and low strength of the gypsum-based self-leveling material are solved.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a high-free-calcium belite sulfoaluminate clinker and its preparation method, a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material and its application. Background Technology

[0002] Gypsum-based self-leveling materials contain gypsum, active admixtures (such as slag and fly ash), and functional additives. They feature low shrinkage, rapid hardening and early strength, high construction efficiency, and low carbon footprint. The calcination energy consumption is only 1 / 8 that of cement. Currently, a shrinkage rate of ≤0.05% and a flowability of 140mm~160mm can be achieved, with pumping efficiency increased by 2 to 3 times. They are widely used in underfloor heating leveling and prefabricated building flooring, and in some fields, they have become a green alternative to cement-based materials.

[0003] However, gypsum-based self-leveling materials have several technical bottlenecks that prevent their use in humid, outdoor, and heavy-duty environments, significantly hindering their large-scale application. Specifically: gypsum-based self-leveling materials have low strength, with industry standards specifying oven-dry strength of 20MPa and 25MPa; poor water resistance, with very low strength retention after immersion in water, and collapse after prolonged soaking; and poor frost resistance. Some gypsum-based self-leveling materials incorporate large amounts of high-alumina cement (priced at 2000-8000 RMB / ton), significantly increasing raw material costs and hindering the technology's widespread adoption. Furthermore, existing gypsum-based self-leveling materials are primarily designed for single varieties of gypsum, such as desulfurized gypsum-based building gypsum, phosphogypsum-based building gypsum, anhydrite, α-high-strength gypsum, and fluorogypsum, and a comprehensive utilization technology applicable to all these types of gypsum has not yet been developed. Therefore, there is an urgent need to develop a high-strength, water-resistant, and frost-resistant inorganic self-leveling material to expand the application areas of industrial by-product gypsum. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a high-free-calcium belite sulfoaluminate clinker and its preparation method, as well as a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material and its application. Through the design of the high-free-calcium belite sulfoaluminate clinker and the raw material design of the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, the synergistic effect of the high-free-calcium belite sulfoaluminate clinker and granulated blast furnace slag powder can improve the types, composition, and microstructure of hydration products in gypsum-based materials, significantly increasing the water-resistant and high-strength hydration products ettringite and C-(A)-SH. Simultaneously, it achieves a dense coating of dihydrate gypsum by both, thereby solving the problems of poor water resistance, poor freeze-resistance, and low strength in gypsum-based self-leveling materials.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] In a first aspect, the present invention provides a high-free-calcium belite sulfoaluminate clinker comprising the following mineral components by mass percentage: anhydrous calcium sulfoaluminate 25.31%~33.27%, free calcium sulfate 6.55%~12.26%, free calcium oxide 14.82%~19.71%, belite 27.27%~33.87%, and iron phase 3.04%~6.08%.

[0007] Compared to existing technologies, the high-free-calcium belite sulfoaluminate clinker (hereinafter referred to as clinker) provided by this invention introduces a specific amount of free calcium sulfate into the clinker. Anhydrous calcium sulfoaluminate can be dissolved in the liquid phase of free calcium sulfate (free calcium sulfate forms a liquid phase during high-temperature calcination), generating a mixture of amorphous anhydrous calcium sulfoaluminate and cubic anhydrous calcium sulfoaluminate. In the presence of free calcium sulfate, the activity of cubic anhydrous calcium sulfoaluminate is much higher than that of orthorhombic anhydrous calcium sulfoaluminate in conventional sulfoaluminate cement clinker. A specific amount of free calcium oxide is also introduced into the clinker. Free calcium oxide has high hydration activity and can react rapidly upon contact with water. Therefore, higher levels of free calcium and appropriate amounts of free calcium sulfate significantly enhance the activity of other minerals in the clinker and the clinker as a whole. This clinker reacts rapidly upon contact with water, generating a large number of metastable monosulfide-type hydrated calcium sulfoaluminate (AFm) microcrystals. Because the reactants mentioned above are highly reactive, the resulting AFm crystals are small in size, highly reactive, and in a metastable state. When Ca reappears in the system... 2+ and SO4 2- When ions are present, they can react rapidly to form a more stable trisulfide-type hydrated calcium sulfoaluminate (also known as ettringite, AFt).

[0008] Preferably, the belite comprises dicalcium silicate.

[0009] Preferably, the iron phase comprises tetracalcium aluminoferrite.

[0010] Preferably, the high free calcium belite sulfoaluminate clinker further includes 5.03% to 7.66% mixed mineral components.

[0011] For example, based on a mass content of 100% high-free-calcium belite sulfoaluminate clinker, the mixed mineral composition includes 2%~4% periclase, 0.85%~2.55% perovskite, and 0.5%~1.5% alkali metal sulfates.

[0012] Preferably, the high free calcium berite sulfoaluminate clinker comprises the following oxides in mass percentage: SiO2 9.5%~11.8%, Al2O3 14%~18%, CaO 55%~58%, SO3 8%~11%, and Fe2O3 1%~2%.

[0013] More preferably, the high-free-calcium belite sulfoaluminate clinker further includes 4% to 6.7% mixed oxides.

[0014] For example, the hybrid oxides include at least one of MgO, TiO2, Na2O or K2O.

[0015] Preferably, the specific surface area of ​​the high free calcium belite sulfoaluminate clinker is ≥500 m². 2 / kg.

[0016] Secondly, the present invention provides a method for preparing the aforementioned high-free-calcium belite sulfoaluminate clinker, comprising the following steps:

[0017] Limestone, bauxite, and gypsum are mixed and ground to obtain raw material;

[0018] The raw material is calcined at 1200℃~1300℃ to obtain high free calcium berite sulfoaluminate clinker.

[0019] The present invention provides a method for preparing high-free-calcium belite sulfoaluminate clinker. The method designs the amount of raw materials based on the mineral composition of the clinker, thereby calculating the proportion of each oxide in the clinker. Through extensive experimentation, the present invention has found that the optimal firing temperature range for this type of clinker is 1200℃ to 1300℃. Temperatures that are too high or too low will not allow for the formation of the target mineral composition. If the calcination temperature is too low, the mineral composition of the clinker will not be fully formed; if the calcination temperature is too high, some mineral components will decompose, and neither method will achieve the desired mineral composition range.

[0020] Preferably, the chemical components in the raw material satisfy the following:

[0021] ([CaO]-1.87×[SiO2]-1.05×[Fe2O3]-0.7×[TiO2]-0.55×[Al2O3]-0.7×[SO3]) / (100%-α)= 14.82%~19.71%

[0022] (1.7×[SO3]-0.45×[Al2O3]+0.28×[Fe2O3]) / (100%-α)=6.55%~12.26%

[0023] In the formula, α represents the loss on ignition of the raw meal.

[0024] It should be noted that in this invention, [CaO] represents the mass percentage of CaO in the raw meal, [SiO2] represents the mass percentage of SiO2 in the raw meal, [Fe2O3] represents the mass percentage of Fe2O3 in the raw meal, [TiO2] represents the mass percentage of TiO2 in the raw meal, [Al2O3] represents the mass percentage of Al2O3 in the raw meal, and [SO3] represents the mass percentage of SO3 in the raw meal; α = ∑ mass percentage of each chemical component in the raw meal × loss on ignition of each chemical component.

[0025] The present invention ensures that the content of free calcium oxide in the clinker meets the requirements by limiting the content to {[CaO]-1.87×[SiO2]-1.4×[Fe2O3]-0.7×[TiO2]-0.73([Al2O3]-0.64×[Fe2O3]) -0.7[[SO3]-([Al2O3]-0.64×[Fe2O3]) / 3.82]} / (100%-α)=14.82%~19.71%; and by limiting the content to 1.7[[SO3]-([Al2O3]-0.64[Fe2O3]) / 3.82] / (100%-α)=6.55%~12.26%, it ensures that the content of free calcium sulfate in the clinker meets the requirements.

[0026] Preferably, the mass ratio of limestone, bauxite and gypsum is (60~71):(17~23):(12~19).

[0027] Preferably, the particle size of the raw material is less than 15% after passing through a 0.08mm square hole sieve.

[0028] For example, calcination is carried out in a rotary kiln, and the time from entering the kiln to exiting it is 30 to 60 minutes. The specific calcination time can be adjusted according to the specific conditions of different rotary kilns.

[0029] For example, after calcination, the process also includes cooling and grinding to obtain powdered high-free-calcium belite sulfoaluminate clinker.

[0030] Thirdly, the present invention provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, the raw material of which includes the aforementioned high-free-calcium belite sulfoaluminate clinker.

[0031] This invention, through research, reveals that high-free-calcium belite sulfoaluminate clinker provides an excess of free calcium oxide. Due to the moderate calcium sulfate content in the system, free calcium oxide, amorphous / cubic anhydrous calcium sulfoaluminate, and free calcium sulfate in the clinker can react rapidly, generating a large number of metastable AFm microcrystals in a short time. Because the above reactants are highly reactive, the generated AFm microcrystals are small in size, highly reactive, and in a metastable state. As the externally added gypsum gradually dissolves, the surrounding Ca... 2+ and SO4 2- Increased ion concentration induces an AFm reaction, which directs the formation of numerous AFt microcrystals around the dihydrate gypsum, a product of gypsum hydration. These AFt microcrystals gradually encapsulate the dihydrate gypsum crystals. The AFt microcrystals generated in this invention are small in size and have a good encapsulation effect, enabling the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material to rapidly form a framework, generating a dense microstructure and producing high early strength.

[0032] Preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material further includes the following raw materials: gypsum and granulated blast furnace slag powder.

[0033] The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material provided by this invention utilizes the synergistic effect of high-free-calcium belite sulfoaluminate clinker and granulated blast furnace slag powder to improve the types, composition, and microstructure of gypsum hydration products. It also promotes the directional growth of hydration products AFt and C-(A)-SH gel with excellent water resistance around dihydrate gypsum, preventing external moisture from dissolving the dihydrate gypsum. This significantly improves the water resistance and mechanical strength of gypsum-based materials, and the curing strength in standard water is greater than that in standard dry air curing.

[0034] In this invention, the dihydrate gypsum crystals formed by the external addition of gypsum are densely coated with both AFt microcrystals and C-(A)-SH gel. Even with a high gypsum content, this prevents the easily water-soluble dihydrate gypsum from dissolving in water, thus solving the problems of poor water resistance, significantly reduced strength, and poor freeze-thaw resistance in gypsum-based self-leveling materials caused by the high solubility of dihydrate gypsum. As the microstructure gradually becomes denser, the porosity of the high-strength, water-resistant, and freeze-thaw-resistant inorganic self-leveling material gradually decreases, thereby gradually improving its mechanical strength.

[0035] Preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material comprises the following raw materials in the following mass percentages: 2.12%~13.5% high free calcium belite sulfoaluminate clinker, 10%~55% gypsum, and 16.2%~73.6% granulated blast furnace slag powder.

[0036] More preferably, the gypsum includes at least one of desulfurized gypsum-based building gypsum, phosphogypsum-based building gypsum, dried desulfurized gypsum, dried phosphogypsum, wet desulfurized gypsum, wet phosphogypsum, α-high-strength gypsum, fluorogypsum, anhydrite, or dihydrate gypsum.

[0037] In this invention, desulfurized gypsum-based building gypsum and phosphogypsum-based building gypsum should meet the requirements of GB / T 9776-2022 "Building Gypsum"; desulfurized gypsum, phosphogypsum, and fluorogypsum should meet the requirements of GB / T 21371-2019 "Industrial By-product Gypsum Used in Cement", and phosphogypsum should also meet the requirements of GB / T 23456-2018 "Phosphogypsum"; α-high-strength gypsum should meet the requirements of JC / T 2038-2010 "α-type High-strength Gypsum"; anhydrite and dihydrate gypsum should meet the requirements of GB / T 5483-2024 "Natural Gypsum". When this invention uses two or more types of gypsum in a compound formulation, there are no requirements regarding the dosage of different gypsum types. It should be noted that dried desulfurized gypsum is obtained by drying wet desulfurized gypsum, and dried phosphogypsum is obtained by drying wet phosphogypsum.

[0038] The difficulty of processing different types of gypsum varies greatly in this field, especially the processing of phosphogypsum, which is a major challenge in China. Therefore, many current gypsum processing technologies are mostly designed for processing single types of gypsum. However, this invention is applicable to almost all types of gypsum, especially industrial by-product gypsum, without requiring special restrictions on the type of gypsum, and is characterized by high efficiency, energy saving, and wide applicability.

[0039] In this invention, the granulated blast furnace slag powder should meet the requirements of GB / T 18046-2017 "Granulated Blast Furnace Slag Powder for Cement, Mortar and Concrete" for granulated blast furnace slag powder of grade not lower than S75, and is further preferably S95 grade.

[0040] More preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material further includes the following raw materials by mass percentage: 0-2.5% (more preferably 0.2%-2.2%) of amorphous calcium aluminate.

[0041] This invention reveals that clinker, amorphous calcium aluminate, and granulated blast furnace slag powder exhibit a synergistic hydration effect. Free calcium oxide in the clinker provides a suitable alkaline environment, which, under the synergistic activation effect of amorphous calcium aluminate, can activate the glassy structure in the granulated blast furnace slag powder. The generated AFt microcrystals induce the dissolution of substances within the glassy structure. Under the induction of AFt microcrystals, [Al(OH)4] can be dissolved from the granulated blast furnace slag powder. - and Ca 2+ It reacts with the externally added gypsum to continue generating AFt, which fills the pores; the remaining Ca in the granulated blast furnace slag powder 2+ and SiO3 2- It also gradually dissolves, and the AFt microcrystals generated in the early clinker reaction are Ca. 2+ and SiO3 2- The reaction generates C-(A)-SH gel, which provides growth sites and accelerates the formation of C-(A)-SH gel. Furthermore, the C-(A)-SH gel can form an encapsulation effect on the outside of gypsum dihydrate crystals. In addition, these C-(A)SH gels have a low calcium-silicon ratio and a denser microstructure, resulting in better encapsulation of gypsum dihydrate.

[0042] More preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material comprises the following raw materials in the following mass percentages: 3.5%~11.5% high free calcium belite sulfoaluminate clinker, 0.4%~2% amorphous calcium aluminate, 18%~40% gypsum, and 46%~72% granulated blast furnace slag powder.

[0043] More preferably, the amorphous content of the amorphous calcium aluminate is ≥99.0%.

[0044] More preferably, the specific surface area of ​​the amorphous calcium aluminate is ≥500 m² / g. 2 / kg.

[0045] The preferred amorphous calcium aluminate has extremely high hydration activity and can react completely within 5 minutes.

[0046] Further preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material also includes the following raw materials in the following mass percentages: mineral admixtures 0-50%, sand 0-65%, microspheres 0-12%, silica fume 0-2%, adhesive powder 0-2%, water-reducing agent 0-0.6%, retarder 0-0.26%, defoamer 0-0.14%, cellulose 0-0.1%, water-repellent agent 0-0.2%, and pigment 0-8%.

[0047] More preferably, the mineral admixture includes at least one of fly ash, limestone powder, steel slag powder, or dolomite powder.

[0048] This invention allows mineral admixtures to be used in high-strength, water-resistant, and freeze-resistant inorganic self-leveling materials, increasing the types of minerals that can be added besides mineral powder. In particular, it can effectively utilize industrial waste (fly ash, steel slag powder), effectively solving the problem of industrial waste reuse.

[0049] More preferably, the sand includes at least one of river sand, dry-mixed sand, quartz sand, or manufactured sand.

[0050] In this invention, the sand can be graded sand, which includes at least one of fine sand of 20 mesh to 120 mesh or coarse sand of 5 mesh to 20 mesh.

[0051] More preferably, the silica fume includes at least one of primary silica fume, white silica fume, or white high-zirconium silica fume.

[0052] More preferably, the adhesive powder includes at least one of acrylic polymeric adhesive powder, vinyl acetate-ethylene copolymer adhesive powder, styrene-acrylic adhesive powder, or styrene-butadiene adhesive powder.

[0053] More preferably, the water-reducing agent includes at least one of polycarboxylate water-reducing agent, melamine water-reducing agent, melamine-based high-efficiency water-reducing agent, FL51 water-reducing agent, or naphthalene-based water-reducing agent.

[0054] More preferably, the retarder includes at least one of citric acid, sodium citrate, sodium gluconate, zinc carbonate, tartaric acid, or gypsum retarder.

[0055] More preferably, the defoamer includes at least one of silicone oil defoamer, polymer composite mineral oil defoamer, or polyether defoamer.

[0056] More preferably, the cellulose includes at least one of methylcellulose, hydroxyethylcellulose, hydroxypropyl methylcellulose (HPMC), carboxymethylcellulose, hydroxypropyl methylcellulose ether, or hydroxyethyl methylcellulose ether.

[0057] More preferably, the hydrophobic agent includes at least one of silane hydrophobic agents or organosilicon powder hydrophobic agents.

[0058] More preferably, the pigment includes at least one of titanium dioxide, ultramarine blue, iron oxide red, iron oxide yellow, iron oxide black, chromium oxide green, cobalt blue, manganese oxide, chromium oxide, ochre, or Prussian red.

[0059] More preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material further includes the following raw materials by mass percentage: coarse aggregate 0~41.2%.

[0060] More preferably, the coarse aggregate includes at least one of the following: building crushed stone, quartz stone, colored crushed stone, seashells, colored glass, ceramic aggregate, metal aggregate, or solid wood aggregate.

[0061] More preferably, the coarse aggregate has a particle size of 5mm to 10mm.

[0062] Fourthly, the present invention provides a method for using the aforementioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, comprising the following steps:

[0063] High-strength, water-resistant, and freeze-resistant inorganic self-leveling material is mixed with water at a water-to-material ratio of 0.12 to 0.42, and then the resulting high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry is poured onto the substrate.

[0064] Preferably, the water-to-material ratio is 0.15 to 0.35.

[0065] This invention balances the workability, strength, and volumetric deformation of slurry by limiting the water-to-material ratio.

[0066] Preferably, the substrate includes concrete, mortar, steel structure, insulation material, or mold base.

[0067] Preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a compressive strength of 42.6 MPa to 123.8 MPa and a flexural strength of 7.4 MPa to 20.1 MPa after 28 days of standard curing in water.

[0068] Preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a compressive strength of 46.1 MPa to 128.1 MPa and a flexural strength of 7.9 MPa to 21.4 MPa after 90 days of standard curing in water.

[0069] Preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry exhibits higher compressive and flexural strength under standard water curing conditions than under standard dry air curing conditions.

[0070] Preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a freeze-resistance rating higher than F300.

[0071] More preferably, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a freeze-thaw resistance rating of F600 or higher.

[0072] The present invention has the following beneficial effects:

[0073] Traditional gypsum-based self-leveling materials suffer from low strength, poor water resistance, and poor frost resistance due to the high solubility of their hydration product, gypsum dihydrate, and the absence of colloidal hydration products. These materials tend to crumble and break down upon contact with water. This invention provides a high-strength, water-resistant, and frost-resistant inorganic self-leveling material. By adding high-free-calcium belite sulfoaluminate clinker and granulated blast furnace slag powder to gypsum, the type, composition, and microstructure of the hydration products in gypsum-based materials are improved. This significantly increases the water-resistant and high-strength hydration products, ettringite and C-(A)-SH, while simultaneously achieving a dense coating of the gypsum dihydrate with both. This solves the problems of poor water resistance, poor frost resistance, and low strength inherent in gypsum-based self-leveling materials.

[0074] The industry standard for gypsum-based self-leveling materials only specifies two strength grades: 20 MPa and 25 MPa for 28-day oven-dry compressive strength. However, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material provided by this invention achieves a compressive strength of 42.6 MPa to 123.8 MPa after 28 days of water curing and 41.2 MPa to 94.8 MPa after 28 days of dry air curing, far exceeding the requirements of existing industry standards for gypsum-based self-leveling materials. Attached Figure Description

[0075] Figure 1 This is an electron microscope image of the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry in Example 5 of the present invention after 28 days of curing.

[0076] Figure 2 This is an electron microscope image of the high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry in Example 6 of the present invention after 28 days of curing.

[0077] Figure 3 This is an electron microscope image of the gypsum-based self-leveling slurry in Comparative Example 1 of the present invention after 28 days of curing. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0079] In this invention, the amorphous calcium aluminate was purchased from Anhui Qiming New Materials Co., Ltd., and it has no crystalline phase and a specific surface area of ​​551 m². 2 / kg, density is 2.95g / cm³ 3Desulfurized gypsum-based building gypsum can be purchased from Luanxian Fuyou Renewable Resources Co., Ltd., or Shijiazhuang Rongqiang New Building Materials Co., Ltd.; phosphogypsum-based building gypsum is purchased from Shandong Shantian Chemical Technology Co., Ltd.; fluorogypsum is purchased from Anhui Jinyang Fluorochemical Co., Ltd.; anhydrite is purchased from Anhui Huantai New Materials Co., Ltd.; α-high-strength gypsum is purchased from Pingyi Yuantong Gypsum Products Co., Ltd.; wet desulfurized gypsum is purchased from Qian'an Yangang; wet phosphogypsum is purchased from Qinhuangdao Huaying Phosphoric Acid Co., Ltd.; S95 grade granulated blast furnace slag powder is purchased from Qian'an Shengjiu Building Materials Co., Ltd.; S75 grade granulated blast furnace slag powder is purchased from Yunnan Xinping Yongfu Environmental Protection Co., Ltd.

[0080] Secondary fly ash was purchased from Huashan Fly Ash Distribution Center in Kaiping District; limestone powder was purchased from Tangshan Guoxin Shengmei Trading Co., Ltd., with a specific surface area of ​​253 m². 2 / kg. Microbeads were purchased from Beijing Zhengyuan Yiqing New Materials Co., Ltd. White quartz sand was purchased from Haicheng Danhai Chemical Stone Powder Co., Ltd., dry sand was purchased from Luanxian Jinsheng Dolomite Sand Co., Ltd., coarse sand was purchased from Jianping County Kasong Quartz Sand Plant, and crushed stone was purchased from Luanzhou Haonuo Trading Co., Ltd.

[0081] The water-repellent agent selected is ELOTEX® SEAL80, a highly active redispersible silane water-repellent agent. The water-reducing agent is selected from polycarboxylate superplasticizer containing rubber powder, C900 polycarboxylate superplasticizer, or XDD polycarboxylate superplasticizer. The defoamer is selected from German Mingling Chemical P8850 defoamer, P803 defoamer, or Shandong XDD Industrial Group Co., Ltd. The cellulose is selected from T-type HPMC cellulose, Fangdakang HPMC cellulose, 40000 PFV hydroxyethyl methyl cellulose (HEMC), or 400 PFV hydroxyethyl methyl cellulose (HEMC). The rubber powder is selected from Wacker 5010 rubber powder, Mitsubishi 7400P rubber powder, or Wacker 328 rubber powder.

[0082] PO 42.5 grade ordinary Portland cement was purchased from Tangshan Jidong Qixin Cement Co., Ltd., sandless gypsum-based self-leveling material was purchased from Shandong Xindadi Industrial Group Co., Ltd., and sandy gypsum-based self-leveling material was purchased from Luruitai (Shandong) New Material Technology Co., Ltd.

[0083] Products without a manufacturer are all available through retail purchase.

[0084] To better illustrate the present invention, further examples are provided below.

[0085] Example 1

[0086] This embodiment provides a high-free-calcium belite sulfoaluminate clinker, comprising the following mineral components by weight percentage: anhydrous calcium sulfoaluminate 33.27%, free calcium sulfate 11.35%, free calcium oxide 17.00%, belite 27.27%, iron phase 6.08%, and mixed mineral components 5.03%. The high-free-calcium belite sulfoaluminate clinker also comprises the following oxides by weight percentage: SiO2 9.50%, Al2O3 18.00%, CaO 55.50%, SO3 11.00%, Fe2O3 2.00%, and mixed oxides 4.00%.

[0087] The preparation method of the above-mentioned high free calcium berite sulfoaluminate clinker includes the following steps:

[0088] S100. According to the chemical composition ratio, weigh the raw materials limestone, bauxite and gypsum. The mass ratio of limestone, bauxite and gypsum is 62.0:19.7:18.3. After mixing and grinding, the residue after passing through a 0.08mm square hole sieve is 13%, and the raw material is obtained.

[0089] The chemical components in the raw meal satisfy the following:

[0090] ([CaO]-1.87×[SiO2]-1.05×[Fe2O3]-0.7×[TiO2]-0.55×[Al2O3]-0.7×[SO3]) / (100%-α)= 17.00%

[0091] (1.7×[SO3]-0.45×[Al2O3]+0.28×[Fe2O3]) / (100%-α)=11.35%

[0092] In the formula, α represents the loss on ignition of the raw meal.

[0093] S200: The raw material is calcined in a rotary kiln at 1250℃ and then ground to obtain a specific surface area of ​​530m². 2 / kg of high free calcium belite sulfoaluminate clinker.

[0094] Example 2

[0095] This embodiment provides a high-free-calcium belite sulfoaluminate clinker, comprising the following mineral components by weight percentage: anhydrous calcium sulfoaluminate 25.31%, free calcium sulfate 12.26%, free calcium oxide 14.82%, belite 33.87%, iron phase 6.08%, and mixed mineral components 7.66%. The high-free-calcium belite sulfoaluminate clinker also comprises the following oxides by weight percentage: SiO2 11.80%, Al2O3 14.00%, CaO 55.00%, SO3 10.50%, Fe2O3 2.00%, and mixed oxides 6.70%.

[0096] The preparation method of the above-mentioned high free calcium berite sulfoaluminate clinker includes the following steps:

[0097] S100. According to the chemical composition ratio, weigh the raw materials limestone, bauxite and gypsum. The mass ratio of limestone, bauxite and gypsum is 60.0:21.3:18.7. After mixing and grinding, the residue after passing through a 0.08mm square hole sieve is 12%, and the raw material is obtained.

[0098] The chemical components in the raw meal satisfy the following:

[0099] ([CaO]-1.87×[SiO2]-1.05×[Fe2O3]-0.7×[TiO2]-0.55×[Al2O3]-0.7×[SO3]) / (100%-α)= 14.82%

[0100] (1.7×[SO3]-0.45×[Al2O3]+0.28×[Fe2O3]) / (100%-α)=12.26%

[0101] In the formula, α represents the loss on ignition of the raw meal.

[0102] S200: The raw material is calcined in a rotary kiln at 1200℃ and then ground to obtain a specific surface area of ​​520m². 2 / kg of high free calcium belite sulfoaluminate clinker.

[0103] Example 3

[0104] This embodiment provides a high-free-calcium belite sulfoaluminate clinker, comprising the following mineral components by weight percentage: anhydrous calcium sulfoaluminate 30.57%, free calcium sulfate 9.39%, free calcium oxide 17.66%, belite 33.00%, iron phase 3.05%, and mixed mineral components 6.33%. The high-free-calcium belite sulfoaluminate clinker also comprises the following oxides by weight percentage: SiO2 11.50%, Al2O3 16.00%, CaO 56.00%, SO3 9.50%, Fe2O3 1.00%, and mixed oxides 6.00%.

[0105] The preparation method of the above-mentioned high free calcium berite sulfoaluminate clinker includes the following steps:

[0106] S100. According to the chemical composition ratio, weigh the raw materials limestone, bauxite and gypsum. The mass ratio of limestone, bauxite and gypsum is 62.4:20.8:16.8. After mixing and grinding, the residue after passing through a 0.08mm square hole sieve is 14%, and the raw material is obtained.

[0107] The chemical components in the raw meal satisfy the following:

[0108] ([CaO]-1.87×[SiO2]-1.05×[Fe2O3]-0.7×[TiO2]-0.55×[Al2O3]-0.7×[SO3]) / (100%-α)= 17.66%

[0109] (1.7×[SO3]-0.45×[Al2O3]+0.28×[Fe2O3]) / (100%-α)=9.39%

[0110] In the formula, α represents the loss on ignition of the raw meal.

[0111] S200: The raw material is calcined in a rotary kiln at 1300℃ and then ground to obtain a specific surface area of ​​510 m². 2 / kg of high free calcium belite sulfoaluminate clinker.

[0112] Example 4

[0113] This embodiment provides a high-free-calcium belite sulfoaluminate clinker, comprising the following mineral components by mass percentage: anhydrous calcium sulfoaluminate 31.92%, free calcium sulfate 6.55%, free calcium oxide 19.71%, belite 32.14%, iron phase 4.56%, and mixed mineral components 5.12%. The high-free-calcium belite sulfoaluminate clinker also comprises the following oxides by mass percentage: SiO2 11.20%, Al2O3 17.00%, CaO 58.00%, SO3 8.00%, Fe2O3 1.50%, and mixed oxides 4.30%.

[0114] The preparation method of the above-mentioned high free calcium berite sulfoaluminate clinker includes the following steps:

[0115] S100. According to the chemical composition ratio, weigh the raw materials limestone, bauxite and gypsum. The mass ratio of limestone, bauxite and gypsum is 66.4:19.3:14.3. After mixing and grinding, the residue after passing through a 0.08mm square hole sieve is 13%, and the raw material is obtained.

[0116] The chemical components in the raw meal satisfy the following:

[0117] ([CaO]-1.87×[SiO2]-1.05×[Fe2O3]-0.7×[TiO2]-0.55×[Al2O3]-0.7×[SO3]) / (100%-α)= 19.71%

[0118] (1.7×[SO3]-0.45×[Al2O3]+0.28×[Fe2O3]) / (100%-α)=6.55%

[0119] In the formula, α represents the loss on ignition of the raw meal.

[0120] S200: The raw material is calcined in a rotary kiln at 1250℃ and then ground to obtain a specific surface area of ​​525m². 2 / kg of high free calcium belite sulfoaluminate clinker.

[0121] Example 5

[0122] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, which is composed of the following raw materials in the following mass percentages: 4% high free calcium belite sulfoaluminate clinker from Example 1, 36% desulfurized gypsum-based building gypsum, and 60% S95 grade granulated blast furnace slag powder.

[0123] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.4.

[0124] After curing the high-strength, water-resistant, and freeze-resistant inorganic self-leveling mortar of this embodiment for 28 days, electron microscopy and X-ray photoelectron spectroscopy were performed. The test results are as follows: Figure 1 As shown in Table 1, X-ray photoelectron spectroscopy (XPS) results confirmed that the molar contents of Ca, S, O, and Al at the first point were 16.35%, 15.75%, 65.51%, and 0.39%, respectively, indicating that the gypsum dihydrate was the main component. At the second point, the molar contents of Ca, S, O, Al, and Si were 10.77%, 5.65%, 69.66%, 3.70%, and 1.24%, respectively, indicating that the gypsum AFt was the main component. At the third point, the molar contents of Ca, S, O, Al, and Si were 21.81%, 1.33%, 54.06%, 5.58%, and 11.09%, respectively, indicating that the gypsum AFt was the main component. These experimental results confirm that in this embodiment, the gypsum dihydrate (a hydration product of gypsum) was densely coated with the modified hydration products AFt and C-(A)-SH.

[0125] Table 1. X-ray energy dispersive spectroscopy results of the hydration products of the slurry in Example 5.

[0126]

[0127] Example 6

[0128] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, which is composed of the following raw materials in the following mass percentages: 7% high free calcium belite sulfoaluminate clinker from Example 1, 55% desulfurized gypsum-based building gypsum, and 38% S95 grade granulated blast furnace slag powder.

[0129] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.4.

[0130] After curing the high-strength, water-resistant, and freeze-resistant inorganic self-leveling mortar of this embodiment for 28 days, electron microscopy and X-ray photoelectron spectroscopy were performed. The test results are as follows: Figure 2 As shown in Table 2, X-ray photoelectron spectroscopy (XPS) results confirmed that the molar contents of Ca, S, O, Al, and Si at the first point were 16.20%, 16.60%, 64.20%, 0.50%, and 0.68%, respectively, indicating that the gypsum dihydrate was the main component. At the second point, the molar contents were 10.77%, 5.58%, 73.13%, 3.17%, and 1.49%, respectively, indicating that the gypsum AFt was the main component. At the third point, the molar contents were 22.87%, 1.70%, 51.88%, 6.22%, and 12.61%, respectively, indicating that the gypsum AFt was the main component. These experimental results confirm that in this embodiment, the gypsum dihydrate (a hydration product of gypsum) was densely coated with the modified hydration products AFt and C-(A)-SH.

[0131] Table 2. X-ray energy dispersive spectroscopy results of the hydration products of the slurry in Example 6.

[0132]

[0133] Example 7

[0134] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 8.3% high free calcium belite sulfoaluminate clinker, 0.7% amorphous calcium aluminate, 18% desulfurized gypsum-based building gypsum, 71.18% S95 grade granulated blast furnace slag powder, 0.9% adhesive powder, 0.6% XDD polycarboxylate superplasticizer, 0.2% sodium gluconate, 0.06% sodium citrate, and 0.06% defoamer.

[0135] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.18.

[0136] Example 8

[0137] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.89% high free calcium belite sulfoaluminate clinker (Example 1), 0.41% amorphous calcium aluminate, 10.59% desulfurized gypsum-based building gypsum, 38.74% S95 grade granulated blast furnace slag powder, 5.35% 5-10 mesh coarse sand, 35.6% 10-20 mesh coarse sand, 3.53% microspheres, 0.53% adhesive powder, 0.17% XDD polycarboxylate superplasticizer, 0.12% sodium gluconate, 0.035% sodium citrate, and 0.035% defoamer.

[0138] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.12.

[0139] Example 9

[0140] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 8.3% high-free-calcium belite sulfoaluminate clinker, 0.7% amorphous calcium aluminate, 18% desulfurized gypsum-based building gypsum, 61.9% S95 grade granulated blast furnace slag powder, 10% microspheres, 0.5% adhesive powder, 0.32% adhesive-containing polycarboxylate superplasticizer, 0.08% sodium gluconate, 0.1% gypsum retarder AG46, and 0.1% defoamer.

[0141] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.25.

[0142] Example 10

[0143] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 8.3% high free calcium belite sulfoaluminate clinker, 0.7% amorphous calcium aluminate, 20% dried desulfurized gypsum, 69.48% S95 grade granulated blast furnace slag powder, 0.9% adhesive powder, 0.35% C900 water-reducing agent, 0.03% XDD polycarboxylate water-reducing agent, 0.16% sodium gluconate, 0.06% defoamer, and 0.02% cellulose.

[0144] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.23.

[0145] Example 11

[0146] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 8.3% high free calcium belite sulfoaluminate clinker, 0.7% amorphous calcium aluminate, 20% dried phosphogypsum, 69.67% S95 grade granulated blast furnace slag powder, 0.9% adhesive powder, 0.21% XDD polycarboxylate superplasticizer, 0.14% sodium gluconate, 0.06% defoamer, and 0.02% cellulose.

[0147] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.23.

[0148] Example 12

[0149] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 6.18% high-free-calcium belite sulfoaluminate clinker (Example 1), 0.32% amorphous calcium aluminate, 33.6% desulfurized gypsum-based building gypsum, 14% dried phosphogypsum, 44.53% S95 grade granulated blast furnace slag powder, 0.8% adhesive powder, 0.24% C900 water-reducing agent, 0.08% XDD polycarboxylate water-reducing agent, 0.12% sodium gluconate, 0.1% defoamer, and 0.03% cellulose.

[0150] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0151] Example 13

[0152] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 6% high free calcium belite sulfoaluminate clinker from Example 1, 55% desulfurized gypsum-based building gypsum, 37.8% S95 grade granulated blast furnace slag powder, 0.8% adhesive powder, 0.18% XDD polycarboxylate superplasticizer, 0.1% sodium gluconate, 0.04% defoamer, and 0.08% cellulose.

[0153] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.42.

[0154] Example 14

[0155] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker, 0.53% amorphous calcium aluminate, 50.4% desulfurized gypsum-based building gypsum, 36.75% S95 grade granulated blast furnace slag powder, 6% microspheres, 1.1% adhesive powder, 0.27% XDD polycarboxylate superplasticizer, 0.05% gypsum retarder AG46, 0.1% defoamer, and 0.03% cellulose.

[0156] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0157] Example 15

[0158] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 6.46% high free calcium belite sulfoaluminate clinker (Example 2), 0.33% amorphous calcium aluminate, 40% anhydrite, 22.5% S95 grade granulated blast furnace slag powder, 20% secondary fly ash, 10% microspheres, 0.3% adhesive powder, 0.28% XDD polycarboxylate superplasticizer, 0.1% defoamer, and 0.03% cellulose.

[0159] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.20.

[0160] Example 16

[0161] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.54% high free calcium belite sulfoaluminate clinker (Example 2), 0.5% amorphous calcium aluminate, 16% desulfurized gypsum-based building gypsum, 23.63% S95 grade granulated blast furnace slag powder, 4% 325 mesh dolomite powder, 5% 80-120 mesh white quartz sand, 10% 20-40 mesh white quartz sand, 25% 40-70 mesh white quartz sand, 2% white silica fume, 1% adhesive powder, 0.18% XDD polycarboxylate superplasticizer, 0.08% citric acid, 0.06% sodium gluconate, 0.01% cellulose, and 8% titanium dioxide.

[0162] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.21.

[0163] Example 17

[0164] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 7.6% high free calcium belite sulfoaluminate clinker (Example 2), 0.4% amorphous calcium aluminate, 22% desulfurized gypsum-based building gypsum, 36.59% S95 grade granulated blast furnace slag powder, 30% limestone powder, 1% adhesive powder, 0.23% XDD polycarboxylate superplasticizer, 0.08% sodium gluconate, 0.04% defoamer, 0.06% cellulose, and 2% ultramarine blue.

[0165] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.36.

[0166] Example 18

[0167] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 8.46% high free calcium belite sulfoaluminate clinker (Example 2), 0.44% amorphous calcium aluminate, 16% desulfurized gypsum-based building gypsum, 22.6% S95 grade granulated blast furnace slag powder, 50% secondary fly ash, 1.8% adhesive powder, 0.25% C900 water-reducing agent, 0.13% XDD polycarboxylate water-reducing agent, 0.06% sodium gluconate, 0.04% defoamer, 0.02% cellulose, and 0.2% water-repellent agent.

[0168] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.28.

[0169] Example 19

[0170] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 2), 0.53% amorphous calcium aluminate, 30% desulfurized gypsum-based building gypsum, 62.72% S95 grade granulated blast furnace slag powder, 1.5% adhesive powder, 0.26% XDD polycarboxylate superplasticizer, 0.12% sodium gluconate, 0.05% defoamer, and 0.05% cellulose.

[0171] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.26.

[0172] Example 20

[0173] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 3.63% high free calcium belite sulfoaluminate clinker (Example 2), 0.4% amorphous calcium aluminate, 27.6% desulfurized gypsum-based building gypsum, 59.28% S95 grade granulated blast furnace slag powder, 8% microspheres, 0.6% adhesive powder, 0.27% XDD polycarboxylate superplasticizer, 0.06% sodium gluconate, 0.14% defoamer, and 0.02% cellulose.

[0174] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.22.

[0175] Example 21

[0176] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 2.38% high free calcium belite sulfoaluminate clinker (Example 2), 16.47% desulfurized gypsum-based building gypsum, 34.75% S95 grade granulated blast furnace slag powder, 5.35% 5-10 mesh coarse sand, 35.65% 10-20 mesh coarse sand, 4.7% microspheres, 0.35% adhesive powder, 0.16% XDD polycarboxylate superplasticizer, 0.06% gypsum retarder AG36, 0.04% sodium gluconate, 0.08% defoamer, and 0.01% cellulose.

[0177] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.13.

[0178] Example 22

[0179] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 2), 0.53% amorphous calcium aluminate, 23% desulfurized gypsum-based building gypsum, 51.18% S95 grade granulated blast furnace slag powder, 6% 80-120 mesh dry sand, 14% 40-70 mesh dry sand, 0.2% adhesive powder, 0.1% XDD polycarboxylate superplasticizer, 0.12% sodium gluconate, 0.04% defoamer, and 0.06% cellulose.

[0180] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0181] Example 23

[0182] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.5% high free calcium belite sulfoaluminate clinker (Example 2), 0.5% amorphous calcium aluminate, 20% phosphogypsum-based building gypsum, 28.55% S95 grade granulated blast furnace slag powder, 12% 80-120 mesh dry sand, 28% 40-70 mesh dry sand, 6% microspheres, 0.26% XDD polycarboxylate superplasticizer, 0.05% sodium gluconate, 0.04% defoamer, and 0.1% cellulose.

[0183] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.18.

[0184] Example 24

[0185] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 2.81% high free calcium belite sulfoaluminate clinker (Example 2), 0.31% amorphous calcium aluminate, 12.5% ​​desulfurized gypsum-based building gypsum, 17.7% S95 grade granulated blast furnace slag powder, 7.5% 80-120 mesh dry sand, 17.5% 40-70 mesh dry sand, 12.5% ​​5-10 mesh coarse sand, 25.1% 10-20 mesh coarse sand, 3.75% microspheres, 0.06% adhesive powder, 0.15% XDD polycarboxylate superplasticizer, 0.03% gypsum retarder AG36, 0.03% sodium gluconate, 0.03% defoamer, and 0.03% cellulose.

[0186] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.13.

[0187] Example 25

[0188] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 3.6% high free calcium belite sulfoaluminate clinker (Example 3), 0.4% amorphous calcium aluminate, 21% desulfurized gypsum-based building gypsum, 29.57% S95 grade granulated blast furnace slag powder, 17% 80-120 mesh dry sand, 28% 40-70 mesh dry sand, 0.1% adhesive powder, 0.12% XDD polycarboxylate superplasticizer, 0.08% gypsum retarder AG46, 0.08% sodium gluconate, 0.04% defoamer, and 0.01% cellulose.

[0189] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.20.

[0190] Example 26

[0191] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.5% high free calcium belite sulfoaluminate clinker (Example 3), 0.5% amorphous calcium aluminate, 18% desulfurized gypsum-based building gypsum, 20.37% S95 grade granulated blast furnace slag powder, 15% 80-120 mesh dry sand, 35% 40-70 mesh dry sand, 6% microspheres, 0.2% adhesive powder, 0.22% XDD polycarboxylate superplasticizer, 0.12% sodium gluconate, 0.05% defoamer, and 0.04% cellulose.

[0192] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.16.

[0193] Example 27

[0194] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 3), 0.53% amorphous calcium aluminate, 20% desulfurized gypsum-based building gypsum, 73.6% S95 grade granulated blast furnace slag powder, 0.8% adhesive powder, 0.17% XDD polycarboxylate superplasticizer, 0.03% gypsum retarder AG46, 0.05% defoamer, and 0.05% cellulose.

[0195] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0196] Example 28

[0197] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 3), 0.53% amorphous calcium aluminate, 20% desulfurized gypsum-based building gypsum, 20% anhydrite, 53.54% S95 grade granulated blast furnace slag powder, 0.8% adhesive powder, 0.21% XDD polycarboxylate superplasticizer, 0.05% gypsum retarder AG46, 0.05% defoamer, and 0.05% cellulose.

[0198] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0199] Example 29

[0200] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 6.18% high-free-calcium belite sulfoaluminate clinker (Example 3), 0.32% amorphous calcium aluminate, 50% α-high-strength gypsum, 42.51% S95 grade granulated blast furnace slag powder, 0.8% adhesive powder, 0.08% XDD polycarboxylate superplasticizer, 0.03% gypsum retarder AG36, 0.06% defoamer, and 0.02% cellulose.

[0201] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.40.

[0202] Example 30

[0203] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 13.5% high free calcium belite sulfoaluminate clinker, 2.5% amorphous calcium aluminate, 10% desulfurized gypsum-based building gypsum, 60.8% S95 grade granulated blast furnace slag powder, 12% microspheres, 0.6% adhesive powder, 0.32% XDD polycarboxylate superplasticizer, 0.12% sodium gluconate, 0.14% defoamer, and 0.02% cellulose.

[0204] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.24.

[0205] Example 31

[0206] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 3), 0.53% amorphous calcium aluminate, 50% desulfurized gypsum-based building gypsum, 42.25% S95 grade granulated blast furnace slag powder, 2% adhesive powder, 0.19% XDD polycarboxylate superplasticizer, 0.16% gypsum retarder AG36, 0.04% defoamer, and 0.06% cellulose.

[0207] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.40.

[0208] Example 32

[0209] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, which is composed of the following raw materials in the following mass percentages: 6.18% high free calcium belite sulfoaluminate clinker, 0.32% amorphous calcium aluminate, 50% anhydrite, 42.22% S95 grade granulated blast furnace slag powder, 1.2% adhesive powder, 0.06% defoamer, and 0.02% cellulose from Example 3.

[0210] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.40.

[0211] Example 33

[0212] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 6.18% high free calcium belite sulfoaluminate clinker (Example 3), 0.32% amorphous calcium aluminate, 50% wet phosphogypsum, 41.73% S95 grade granulated blast furnace slag powder, 1.4% adhesive powder, 0.25% XDD polycarboxylate superplasticizer, 0.1% defoamer, and 0.02% cellulose.

[0213] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0214] Example 34

[0215] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 4), 0.53% amorphous calcium aluminate, 50% dried desulfurized gypsum, 42.25% S95 grade granulated blast furnace slag powder, 2% adhesive powder, 0.19% XDD polycarboxylate superplasticizer, 0.16% gypsum retarder AG36, 0.04% defoamer, and 0.06% cellulose.

[0216] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.40.

[0217] Example 35

[0218] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.77% high free calcium belite sulfoaluminate clinker (Example 4), 0.53% amorphous calcium aluminate, 50% phosphogypsum-based building gypsum, 42.25% S95 grade granulated blast furnace slag powder, 2% adhesive powder, 0.19% XDD polycarboxylate superplasticizer, 0.16% gypsum retarder AG36, 0.04% defoamer, and 0.06% cellulose.

[0219] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.38.

[0220] Example 36

[0221] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 6.18% high-free-calcium belite sulfoaluminate clinker (Example 4), 0.32% amorphous calcium aluminate, 50% dried phosphogypsum, 41.16% S95 grade granulated blast furnace slag powder, 2% adhesive powder, 0.18% XDD polycarboxylate superplasticizer, 0.08% gypsum retarder AG36, 0.06% defoamer, and 0.02% cellulose.

[0222] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.40.

[0223] Example 37

[0224] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 3.6% high free calcium belite sulfoaluminate clinker (Example 4), 0.4% amorphous calcium aluminate, 50% desulfurized gypsum-based building gypsum, 44.75% S95 grade granulated blast furnace slag powder, 0.8% adhesive powder, 0.25% XDD polycarboxylate superplasticizer, 0.12% gypsum retarder AG36, 0.06% defoamer, and 0.02% cellulose.

[0225] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.30.

[0226] Example 38

[0227] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.5% high free calcium belite sulfoaluminate clinker (Example 4), 0.5% amorphous calcium aluminate, 30% desulfurized gypsum-based building gypsum, 28.43% S75 grade granulated blast furnace slag powder, 6% 80-120 mesh dry sand, 24% 40-70 mesh dry sand, 6% microspheres, 0.1% adhesive powder, 0.3% XDD polycarboxylate superplasticizer, 0.04% gypsum retarder AG36, 0.05% sodium gluconate, 0.06% defoamer, and 0.02% cellulose.

[0228] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.18.

[0229] Example 39

[0230] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 4.75% high free calcium belite sulfoaluminate clinker (Example 4), 0.53% amorphous calcium aluminate, 10.6% desulfurized gypsum-based building gypsum, 38.63% S95 grade granulated blast furnace slag powder, 41.2% 5mm~10mm crushed stone, 3.5% microspheres, 0.5% adhesive powder, 0.1% XDD polycarboxylate superplasticizer, 0.1% sodium gluconate, 0.04% sodium citrate, 0.04% defoamer, and 0.01% cellulose.

[0231] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.12.

[0232] Example 40

[0233] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 2.36% high free calcium belite sulfoaluminate clinker (Example 4), 16.5% desulfurized gypsum-based building gypsum, 34.55% S95 grade granulated blast furnace slag powder, 41.18% 5mm~10mm crushed stone, 4.7% microspheres, 0.35% adhesive powder, 0.16% XDD polycarboxylate superplasticizer, 0.06% gypsum retarder AG36, 0.03% sodium gluconate, 0.08% defoamer, and 0.03% cellulose.

[0234] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.13.

[0235] Example 41

[0236] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 2.81% high free calcium belite sulfoaluminate clinker (Example 4), 0.31% amorphous calcium aluminate, 12.5% ​​desulfurized gypsum-based building gypsum, 17.83% S95 grade granulated blast furnace slag powder, 7.5% 80-120 mesh dry sand, 18% 40-70 mesh dry sand, 37.03% 5mm-10mm crushed stone, 3.75% microspheres, 0.06% adhesive powder, 0.11% XDD polycarboxylate superplasticizer, 0.03% gypsum retarder AG36, 0.03% sodium gluconate, 0.02% defoamer, and 0.02% cellulose.

[0237] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.12.

[0238] Example 42

[0239] This embodiment provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, composed of the following raw materials in the indicated mass percentages: 5.8% high free calcium belite sulfoaluminate clinker (Example 4), 0.3% amorphous calcium aluminate, 11% desulfurized gypsum-based building gypsum, 36.43% S95 grade granulated blast furnace slag powder, 40% blue glass, 1.5% microspheres, 2% white silica fume, 0.6% adhesive powder, 0.18% XDD polycarboxylate superplasticizer, 0.12% sodium gluconate, 0.06% sodium citrate, 0.01% cellulose, and 2% titanium dioxide.

[0240] This embodiment also provides a high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry, which is made by mixing the above-mentioned high-strength, water-resistant, and freeze-resistant inorganic self-leveling material with water, and the water-to-material ratio is 0.13.

[0241] Comparative Example 1

[0242] This comparative example provides a sand-free gypsum-based self-leveling material, purchased from Shandong Xindadi Industrial Group Co., Ltd.

[0243] This comparative example also provides a gypsum-based self-leveling slurry, which is made by mixing the above-mentioned gypsum-based self-leveling material with water, with a water-to-material ratio of 0.40.

[0244] After curing the gypsum-based self-leveling mortar in this comparative example for 28 days, electron microscopy and X-ray photoelectron spectroscopy were performed. The test results are as follows: Figure 3 As shown in Table 3, X-ray photoelectron spectroscopy (XPS) results confirmed that the molar contents of Ca, S, O, and Al at this point were 16.65%, 16.24%, 64.37%, and 0.23%, respectively, indicating that it was mainly composed of gypsum dihydrate. These experimental results confirm that in this comparative example, the gypsum dihydrate (a hydration product of gypsum) was not encapsulated by other hydration products. If water enters the material, the gypsum dihydrate will directly contact the water and dissolve into it.

[0245] Table 3 shows the X-ray energy dispersive spectroscopy results of the hydration products of the slurry in Comparative Example 1.

[0246]

[0247] Comparative Example 2

[0248] This comparative example provides a gypsum-based self-leveling material composed of the following raw materials in weight percentage: 5% PO 42.5 grade ordinary Portland cement, 93.49% desulfurized gypsum-based building gypsum, 0.45% XDD polycarboxylate superplasticizer, 0.1% gypsum retarder AG-46, 0.1% defoamer, 0.06% cellulose, and 0.8% adhesive powder.

[0249] This comparative example also provides a gypsum-based self-leveling slurry, which is made by mixing the above-mentioned gypsum-based self-leveling material with water, and the water-to-material ratio is 0.40.

[0250] Comparative Example 3

[0251] This comparative example provides a self-leveling material based on sand-plaster, purchased from Luruitai (Shandong) New Material Technology Co., Ltd.

[0252] This comparative example also provides a gypsum-based self-leveling slurry, which is made by mixing the above-mentioned gypsum-based self-leveling material with water, and the water-to-material ratio is 0.30.

[0253] Comparative Example 4

[0254] This comparative example provides a gypsum-based self-leveling material composed of the following raw materials in weight percentage: 7.9% PO 42.5 grade ordinary Portland cement, 59% phosphogypsum-based building gypsum, 31.42% 80-120 mesh dry sand, 0.25% XDD polycarboxylate superplasticizer, 0.18% sodium gluconate, 0.1% defoamer, 0.15% cellulose, and 1% adhesive powder.

[0255] This comparative example also provides a gypsum-based self-leveling slurry, which is made by mixing the above-mentioned gypsum-based self-leveling material with water, and the water-to-material ratio is 0.29.

[0256] Comparative Example 5

[0257] This comparative example provides a gypsum-based self-leveling material composed of the following raw materials in weight percentage (similar to Example 5, but with different mineral content in the clinker): 4% high-belite sulfoaluminate cement clinker, 36% desulfurized gypsum-based building gypsum, and 60% S95 grade granulated blast furnace slag powder. The high-belite sulfoaluminate cement clinker includes the following mineral components in weight percentage: 28% anhydrous calcium sulfoaluminate, 16% free calcium sulfate, 3% free calcium oxide, 45% belite, 6% iron phase, and 2% mixed mineral components.

[0258] This comparative example also provides a gypsum-based self-leveling slurry, which is made by mixing the above-mentioned gypsum-based self-leveling material with water, and the water-to-material ratio is 0.40.

[0259] Comparative Example 6

[0260] This comparative example provides a gypsum-based self-leveling material composed of the following raw materials by weight percentage: 15% high-belite sulfoaluminate cement clinker, 14.25% desulfurized gypsum-based building gypsum, 22% S95 grade granulated blast furnace slag powder, 0.05% C900 polycarboxylate superplasticizer, 0.07% sodium citrate, 0.08% 40000PFV cellulose, 1.0% 5010 adhesive powder, 0.05% P8850 defoamer, 16.5% 40-80 mesh dolomite sand, and 31% 80-120 mesh dolomite sand. The high-belite sulfoaluminate cement clinker includes the following mineral components by weight percentage: 28% anhydrous calcium sulfoaluminate, 16% free calcium sulfate, 3% free calcium oxide, 45% belite, 6% iron phase, and 2% mixed mineral components.

[0261] This comparative example also provides a gypsum-based self-leveling slurry, which is made by mixing the above-mentioned gypsum-based self-leveling material with water, and the water-to-material ratio is 0.40.

[0262] Verification test

[0263] The test methods, specifications, and product standards adopted are: JC / T985-2017 Cement-based Self-leveling Mortar for Ground Use, GB / T17671 Test Method for Strength of Cement Mortar, JTG3420-2020 Test Procedures for Cement and Concrete in Highway Engineering (Frost Resistance Performance of Cement Mortar T0596-2020), GB / T50080-2016 Standard for Test Methods of Performance of Ordinary Concrete Mixtures, GB / T50081-2019 Standard for Test Methods of Physical and Mechanical Properties of Ordinary Concrete, and GB / T50082-2024 Standard for Test Methods of Long-term Performance and Durability of Concrete.

[0264] The performance of the gypsum-based self-leveling mortars provided in Examples 5-42 and Comparative Examples 1-6 was tested, and the test results are shown in Tables 4-7.

[0265] Table 4 Performance test results of Examples 5-38 and Comparative Examples 1-6

[0266]

[0267] Table 5 Performance test results of Examples 5-38 and Comparative Examples 1-6

[0268]

[0269] Table 6 Performance test results of Examples 5-38 and Comparative Examples 1-6

[0270]

[0271] Table 7 Performance test results of Examples 39-42

[0272]

[0273] As can be seen from Tables 4 to 7, the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material provided by this invention meets the performance indicators of surface products in the JCT985-2017 standard for cement-based self-leveling mortar for floors. After standard curing in water for 28 days, its maximum compressive strength is 123.8 MPa and its maximum flexural strength is 20.1 MPa; after standard curing in water for 90 days, its maximum compressive strength is 128.1 MPa and its maximum flexural strength is 21.4 MPa; and the compressive and flexural strengths after standard curing in water are higher than those after standard curing in dry air.

[0274] After 10 freeze-thaw cycles, all specimens in Comparative Examples 1-4 pulverized, making it impossible to test their strength, mass loss, and relative dynamic modulus of elasticity, indicating poor freeze-thaw resistance. Comparative Examples 5 and 6 used a clinker-based self-leveling material different from that of this invention, resulting in slightly improved freeze-thaw resistance, but the freeze-thaw resistance rating was only F100. However, the high-strength, water-resistant, freeze-thaw-resistant inorganic self-leveling material provided by this invention has a freeze-thaw resistance rating higher than F300, with some embodiments even reaching F600, demonstrating that the material disclosed in this invention has excellent freeze-thaw resistance and is therefore fully suitable for humid environments, outdoor settings, cold and even extremely cold regions.

[0275] Tests showed that the impact resistance of specimens in Examples 5 to 42 was qualified.

[0276] Furthermore, the cost of ton dry powder material in this embodiment is less than 300 yuan, giving it a strong competitive edge in the market.

[0277] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength, water-resistant, and freeze-resistant inorganic self-leveling material, characterized in that, The raw materials include the following percentages by weight: high free calcium belite sulfoaluminate clinker 2.12%~13.5%, gypsum 10%~55%, and granulated blast furnace slag powder 16.2%~73.6%; The high-free-calcium belite sulfoaluminate clinker comprises the following mineral components by mass percentage: anhydrous calcium sulfoaluminate 25.31%~33.27%, free calcium sulfate 6.55%~12.26%, free calcium oxide 14.82%~19.71%, belite 27.27%~33.87%, and iron phase 3.04%~6.08%; The high free calcium berit sulfoaluminate clinker comprises the following oxides in mass percentage: SiO2 9.5%~11.8%, Al2O3 14%~18%, CaO 55%~58%, SO3 8%~11% and Fe2O3 1%~2%.

2. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 1, characterized in that, The preparation method of the high free calcium berite sulfoaluminate clinker includes the following steps: Limestone, bauxite, and gypsum are mixed and ground to obtain raw material; The raw material is calcined at 1200℃~1300℃ to obtain high free calcium berite sulfoaluminate clinker.

3. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 2, characterized in that, The chemical components in the raw meal satisfy the following: ([CaO]-1.87×[SiO2]-1.05×[Fe2O3]-0.7×[TiO2]-0.55×[Al2O3]-0.7×[SO3]) / (100%-α)= 14.82%~19.71% (1.7×[SO3]-0.45×[Al2O3]+0.28×[Fe2O3]) / (100%-α)=6.55%~12.26% In the formula, α represents the loss on ignition of the raw meal.

4. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 1, characterized in that, The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material also includes the following raw materials by mass percentage: 0-2.5% amorphous calcium aluminate.

5. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 4, characterized in that, The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material also includes the following raw materials by weight percentage: mineral admixtures 0-50%, sand 0-65%, microspheres 0-12%, silica fume 0-2%, adhesive powder 0-2%, water-reducing agent 0-0.6%, retarder 0-0.26%, defoamer 0-0.14%, cellulose 0-0.1%, water-repellent agent 0-0.2%, and pigment 0-8%.

6. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 5, characterized in that, The amorphous content of the amorphous calcium aluminate is ≥99.0%, and the specific surface area is ≥500 m². 2 / kg; and / or The mineral admixture includes at least one of fly ash, limestone powder, steel slag powder, or dolomite powder; and / or The sand includes at least one of river sand, quartz sand, or manufactured sand.

7. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 5 or 6, characterized in that, The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material also includes the following raw materials by mass percentage: coarse aggregate 0~41.2%.

8. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 7, characterized in that, The coarse aggregate includes at least one of the following: building crushed stone, quartz stone, colored crushed stone, seashells, colored glass, ceramic aggregate, metal aggregate, or solid wood aggregate; The coarse aggregate has a particle size of 5mm to 10mm.

9. The method of using the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material according to any one of claims 1 to 8, characterized in that, Includes the following steps: High-strength, water-resistant, and freeze-resistant inorganic self-leveling material is mixed with water at a water-to-material ratio of 0.12 to 0.42, and then the resulting high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry is poured onto the substrate.

10. The method of using the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 9, characterized in that, The substrate includes concrete, mortar, steel structure, insulation material, or mold base.

11. The method of using the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 9, characterized in that, The high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a compressive strength of 42.6 MPa to 123.8 MPa and a flexural strength of 7.4 MPa to 20.1 MPa after 28 days of standard curing in water. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a compressive strength of 46.1 MPa to 128.1 MPa and a flexural strength of 7.9 MPa to 21.4 MPa after 90 days of standard curing in water. The high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry exhibits higher compressive and flexural strength under standard water curing conditions than under standard dry air curing conditions.

12. The method of using the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 9, characterized in that, The high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a freeze-resistance rating higher than F300.

13. The method of using the high-strength, water-resistant, and freeze-resistant inorganic self-leveling material as described in claim 12, characterized in that, The high-strength, water-resistant, and freeze-resistant inorganic self-leveling slurry has a freeze-thaw resistance rating of F600 or higher.

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