186 results about "Belite" patented technology

The invention relates to the technical field of cement clinker preparation, and particularly discloses a calcium sulphosilicate mineral clinker with high carbonization activity, a raw material and a preparation method and a hardening method of the calcium sulphosilicate mineral clinker. The clinker is prepared from the following mineral phases: 87.2 to 95.1 percent of calcium sulphosilicate, 2.6 to 9.5 percent of dicalcium silicate and the balance of unreacted raw materials, inevitable impurities and the like. Part of calcium elements in crystal lattices of the calcium sulphosilicate are replaced by at least one of lithium elements, sodium elements, potassium elements and strontium elements. The hardening method comprises the following steps: mixing the calcium sulphosilicate mineral clinker with water, and curing in a carbon dioxide environment to obtain the calcium sulphosilicate mineral hardened body. The mineral clinker disclosed by the invention has excellent carbonization activity, so that the mineral clinker can react with carbon dioxide to obtain high strength, high carbon sequestration is realized, carbon emission is reduced, and the mineral clinker has excellent mechanical properties.

The invention discloses a high belite sulphoaluminate cement-based two-component grouting material and a preparation method thereof. The grouting material comprises a gelling component and a coagulating reinforcing component, wherein the gelling component is prepared from a high belite sulphoaluminate cement clinker and an additive A; the admixture A comprises a water reducing agent, a retarder and slow-release minerals; the coagulating and reinforcing component comprises ordinary Portland cement clinker, calcium hydroxide, gypsum and an additive B; the admixture B comprises a water reducing agent and an early strength agent. According to the high belite sulphoaluminate cement-based grouting material, the formula composition of the high belite sulphoaluminate cement-based grouting material is optimized, so that the hydration process of the high belite sulphoaluminate cement is more continuous and lasting, and the compressive strength of the obtained high belite sulphoaluminate cement-based grouting material can be continuously improved.

The invention relates to the technical field of expansive soil treatment, and particularly discloses an expansive soil rapid hardening material as well as a preparation method and application thereof. The invention discloses an expansive type rapid hardening material for soil. The expansive type rapid hardening material is prepared from the following components: high belite sulphoaluminate cement clinker, ordinary Portland cement, gypsum, solid waste high-activity superfine powder, a nano crystal nucleus induction activating agent, a nano modified complexing agent and a modified early strength agent, the nano crystal nucleus induction activating agent is prepared from nano Al2O3, sodium dodecyl benzene sulfonate, NaOH and Na2SiO3; the nano modified complexing agent is prepared from nano SiO2, lauryl sodium sulfate and silane; the modified early strength agent is prepared from modified graphene oxide, Na2SiO3 and water. According to the technical scheme, the solid waste can be recycled, the expansive soil treated by the hardening material can achieve the effects of high hour strength and good water stability, and the curing speed and the production efficiency are greatly improved.

The invention discloses a mine filling cementing material and a preparation method thereof. The mine filling cementing material comprises the following components in percentage by mass: 3-8 wt% of high belite sulphoaluminate cement clinker; 1-3 wt% of high free calcium silicate cement clinker; 74 to 85 wt% of granulated blast furnace slag powder or granulated blast furnace slag; and 10 to 18 wt% of gypsum. Compared with other paste filling materials with the same strength, the cementing material solves the problems that in the prior art, a mine filling cementing material is poor in excitation effect and poor in mechanical property, so that the mine filling effect is affected, and the cost is high due to the fact that the using amount of the cementing material is large, and meanwhile the using proportion is reduced; and the use of mine backfill engineering is fully met.

The invention discloses a high belite iron aluminate cement clinker, which is prepared from the following raw materials in parts by weight: 39 to 73 parts of carbide slag, 8 to 37 parts of low-grade bauxite, 10 to 16 parts of ardealite, 1 to 31 parts of fly ash and 3 to 9 parts of steel slag. According to the cement clinker, the resource utilization rate of industrial solid waste in cement preparation can be remarkably increased, and dependence on natural raw materials and high-grade raw materials is reduced; impurities in various solid wastes can be used as in-situ mineralizing agents and activating agents, and on the basis of realizing high-added-value resource utilization of various industrial solid wastes and low-grade bauxite, efficient synthesis of target minerals at a relatively low temperature is promoted; and gradient temperature control calcination and gradient cooling processes are further combined, so that sufficient crystallization and development of a target mineral phase can be effectively promoted, a clinker microstructure is optimized, excellent early strength and continuously increased later strength of the cement are ensured, and the common problems of strength shrinkage and the like of the traditional solid waste-based cement can be effectively avoided.

The invention discloses a high-strength artificial stone which is obtained by carbonating, curing and curing artificial stone slurry, the artificial stone slurry is prepared from the following raw materials in parts by mass: 40 to 60 parts of steel slag, 2 to 10 parts of cement, 70 to 120 parts of calcium magnesia, 0.04 to 0.12 part of calcium carbonate whisker, 0.01 to 0.03 part of polyphosphate, 0 to 10 parts of silica fume, 1 to 2 parts of fiber and 8 to 10 parts of water. The chemical components of the steel slag comprise silicon dioxide, magnesium oxide and calcium oxide; the mineral components of the steel slag comprise tricalcium silicate, beta-type dicalcium silicate, gamma-type dicalcium silicate, free calcium oxide and free magnesium oxide. According to the high-strength artificial stone provided by the invention, the artificial stone is fine and smooth in surface and relatively high in strength, and actual use requirements are met.

The invention discloses a nano composite cement-based material and a preparation method, and belongs to the technical field of cement-based rapid repairing materials, the material comprises the following components by weight: 1000-1200 parts of high belite sulphoaluminate cement, 525-700 parts of nano activated fly ash, 465-600 parts of superfine slag, 45-78 parts of steel fiber, 28-63 parts of an expanding agent, 15-30 parts of a temperature-sensitive polycarboxylic acid water reducer, 78-95 parts of self-repairing microcapsules, and 284-325 parts of water. Wherein the self-repairing microcapsule is of a double-capsule-core and double-capsule-wall structure. The preparation method comprises the following steps: preparing the self-repairing microcapsule, mixing the cementing material, adding the water reducing agent and water, stirring, adding the microcapsule and the expanding agent, stirring, curing and the like. According to the invention, through a synergistic enhancement technology of a composite gel system, a multi-dimensional enhanced network and an environmental response technology, the material has the characteristics of rapid hardening and early strength, can be demolded within 2 hours, and solves the problems of long initial setting time, poor crack resistance, lack of self-repairing capability, high maintenance frequency and the like in repairing of the airfield pavement in the arid region.

The invention belongs to the technical field of solid waste resource utilization, and discloses a belite-aluminate mineral additive and a preparation method and application thereof.The belite-aluminate mineral additive is prepared from, by mass, 25-40 parts of alumina tailing slag, 60-65 parts of carbide slag, 1-8 parts of coal gangue, 0.1-0.5 part of CaF2, 2-8 parts of fluorgypsum and 0.1-0.5 part of borax. The prepared belite-aluminate mineral additive mainly comprises monocalcium aluminate, dodecacalcium heptaaluminate, dicalcium silicate and tetracalcium aluminoferrite, when Portland cement is modified with the doping amount of about 10%, the setting time of the cement can be effectively shortened, the early strength can be improved, the performance is excellent, low-temperature calcination is achieved, and energy is saved.

The invention provides a self-repairing microcapsule as well as a preparation method and application thereof, and belongs to the technical field of self-repairing of well cementation cement-based materials in oil and gas well engineering. The preparation method of the self-repairing microcapsule comprises the following steps: uniformly mixing gamma dicalcium silicate powder with nano calcium carbonate powder to obtain a capsule core material; the preparation method comprises the following steps: by taking a mixed solution of ethanol and water as a solvent, sequentially adding a silicon source, a capsule core material and a dispersing agent, uniformly dispersing to form sol, adjusting the pH value to 9-11, and carrying out hydrolytic polycondensation to obtain the silica-coated gamma-type dicalcium silicate and nano calcium carbonate microcapsule; adding the silica-coated gamma dicalcium silicate and nano calcium carbonate microcapsule into an EVA (Ethylene Vinyl Acetate) hot melt adhesive solution, and carrying out spray drying to obtain the self-repairing microcapsule. By the adoption of the technical scheme, the microcracks of the cement stone of the CO2 geological storage well can be effectively and efficiently repaired, and the long-term integrity of the cement stone of the deep well and safe and permanent storage of CO2 can be guaranteed.

The invention discloses light building corrosion-resistant fiber concrete and a production method thereof, the light building corrosion-resistant fiber concrete comprises the following raw materials by mass: 300-400 parts of high belite sulphoaluminate cement, 10-20 parts of modified corrosion-resistant fiber, 50-80 parts of a mineral admixture, 800-1000 parts of a coarse aggregate, 600-700 parts of a fine aggregate, 5-10 parts of a composite admixture, and 120-150 parts of water; wherein the mineral composition of the high belite sulphoaluminate cement is as follows: 18 to 25 percent of C4AF, 15 to 20 percent of anhydrous calcium sulphoaluminate (C4A3S), 45 to 55 percent of belite (C2S) and less than or equal to 10 percent of other minerals. By optimizing the ratio of C4AF to anhydrous calcium sulphoaluminate in the high belite sulphoaluminate cement and combining with a special calcining process, the contradiction of low early strength caused by increase of the content of C4AF is solved, and meanwhile, a foundation is laid for long-term corrosion resistance; and by adopting a silane coupling agent-nano silicon dioxide composite modification technology, the limitation of limited single modification effect is solved, and the synchronous improvement of the corrosion resistance of the fiber and the interface bonding strength is realized.

The invention relates to belite sulphoaluminate cement, the mass ratio of belite sulphoaluminate cement clinker to gypsum in the cement is (93-100): (0.5-7), the doping amount of gypsum is small, calcium sulphoaluminate can be promoted to be hydrated to generate more alumina gel, the alumina gel and dicalcium silicate generate hydrated calcium aluminosilicate, and the calcium aluminosilicate and dicalcium silicate are mixed to generate calcium aluminosilicate. Meanwhile, calcium sulphoaluminate is promoted to be hydrated to generate less ettringite and part of monosulfur hydrated calcium sulphoaluminate, and the early strength and the later strength of the cement are remarkably improved; the invention further relates to a low-temperature preparation method of the belite sulphoaluminate cement, the calcination temperature of the raw material is 1120-1200 DEG C and is lower than the calcination temperature in the prior art, and the preparation energy consumption of the cement clinker is reduced; according to the present invention, the early strength of the cement prepared through the calcination at the temperature of the present invention develops rapidly, the later strength of the cement slurry does not shrink with the increase of the hydration age, and the cement slurry still presents the stable increase trend, and the calcination temperature can increase the crystal defect of the calcium sulphoaluminate so as to easily provide the hydration activity of the calcium sulphoaluminate.

The invention provides anti-crack foam concrete as well as a preparation method and application thereof, and belongs to the technical field of building materials. The added quick lime can generate a certain micro-expansion effect when encountering water, shrinkage of the material caused by hydration can be compensated to a certain extent, an alkaline environment can be provided for the foaming agent, and smooth foaming is guaranteed; the magnesite tailing powder is added, so that dicalcium silicate, tricalcium silicate and periclase crystal phases with relatively high fire resistance can be obtained when a fire disaster occurs; the phosphogypsum is added as an activator of the coal gasification slag, so that the hydration induction period is shortened, the later strength development is promoted, and the crack resistance of the foam concrete is improved; the modified fibers are added, the fibers form an irregular supporting structure in the multi-bubble slurry to play a role in protecting the foam, meanwhile, the fibers can improve the pore structure and also have an effect of hindering microcrack propagation, and the three fibers have a synergistic effect, so that the crack resistance of the foam concrete is improved.

The invention relates to iron-rich-belite sulphoaluminate cement prepared from iron tailings and fluorgypsum and a method. The iron-rich-belite sulphoaluminate cement is prepared from iron-rich-belite sulphoaluminate cement clinker and natural gypsum in a mass ratio of 100: (6-18), the iron-rich type-belite sulphoaluminate cement clinker is prepared from the following raw materials in percentage by mass: 15 to 18 percent of iron tailings, 6 to 10 percent of fluorgypsum, 20 to 23 percent of steel slag, 12 to 14 percent of aluminum ash and 39 to 43 percent of limestone. The iron tailings, the fluorgypsum, the steel slag, the aluminum ash and the limestone synergistically provide required calcium, silicon, aluminum, iron and sulfur, hydration of the iron-rich belite sulphoaluminate cement clinker is facilitated to generate a target hydration product by supplementing a certain amount of natural gypsum, and the ratio of the raw materials is controlled, so that the mechanical property of the obtained cement is excellent; the consumption of natural raw materials is reduced, the cost of the raw materials is reduced, and the preparation method is simple and beneficial to industrialization.

The invention relates to the technical field of building materials, in particular to a carbon sequestration concrete solid brick prepared from coal-based solid waste and a preparation method of the carbon sequestration concrete solid brick. The carbon sequestration concrete solid brick is prepared from the following raw materials in parts by weight: 20 to 30 parts of fly ash, 65 to 75 parts of furnace bottom slag and 5 parts of cement, wherein the fly ash is secondary ash, the particle size of the furnace bottom slag is smaller than or equal to 4.75 mm, and the mark number of the cement is P.O 42.5. The method comprises the following steps: firstly, enabling carbon dioxide to react with alkaline components such as dicalcium silicate in the fly ash to form carbonate so as to realize effective carbon sequestration; and then through secondary mineralization maintenance, carbon dioxide, active components such as calcium and magnesium in the cement and dicalcium silicate which is not completely reacted in the fly ash are subjected to carbonation reaction, so that a product layer filling effect is realized. According to the invention, the building material with good carbon sequestration performance and excellent mechanical properties is prepared by utilizing industrial solid waste and carbon dioxide, so that energy conservation and emission reduction are realized, meanwhile, greenhouse gas emission is reduced, and the performance of the building solid waste brick is enhanced.

The invention relates to the technical field of civil engineering materials, in particular to a cement-based composite coiled material for emergency rescue and a rapid construction method.The cement-based composite coiled material for emergency rescue comprises a stereoscopic three-dimensional structure fabric and hydraulic cement-based filler, the stereoscopic three-dimensional structure fabric is filled with the hydraulic cement-based filler, and the hydraulic cement-based filler is arranged in the stereoscopic three-dimensional structure fabric. One side of the bottom of the three-dimensional structure fabric further comprises a waterproof wear-resistant coating; the hydraulic cement-based filler is prepared from the following components in parts by weight: 30 to 45 parts of high belite sulphoaluminate cement, 10 to 20 parts of ordinary Portland cement, 10 to 15 parts of fly ash, 5 to 8 parts of alpha-semi-hydrated gypsum, 3 to 5 parts of an expanding agent, 0.5 to 1.5 parts of a polycarboxylic acid type water reducing agent, 25 to 35 parts of silica sand and 0.1 to 0.8 part of a thickening time control agent. The prepared cement-based composite coiled material for emergency rescue has good tensile property, and the prepared cement-based composite coiled material meets the one-day compressive strength gt; the 28-day compressive strength is gt; the pressure is 65 MPa; the one-day tensile strength is gt; 3.5 MPa, 28-day tensile strength gt; and the performance index requirement of 5.5 MPa is met.

The invention relates to the technical field of building materials, and particularly discloses high-strength water-resistant anti-freezing plastering spraying mortar and a preparation method thereof. The high-strength waterproof anti-freezing plastering spraying mortar is prepared from the following raw materials in percentage by mass: 2.5 percent to 9.3 percent of high-free calcium belite sulphoaluminate clinker, 20 percent to 50 percent of gypsum, 9.4 percent to 56.5 percent of granulated blast furnace slag powder and 8 percent to 34 percent of lightweight aggregate. Through the design of the high-free-calcium belite sulphoaluminate clinker and the raw material design of the high-strength water-resistant anti-freezing plastering spraying mortar, the high-free-calcium belite sulphoaluminate clinker and the granulated blast-furnace slag powder have a synergistic effect, so that the types, the composition and the microstructure of hydration products of a gypsum-based material can be improved; the water-resistant and high-strength hydration products ettringite and C-(A)-S-H are greatly increased, and dense coating of the ettringite and C-(A)-S-H on dihydrate gypsum is realized, so that the problems of poor water resistance, poor freezing resistance and low strength of gypsum-based mortar are solved.

The invention discloses a cementing material capable of improving toughness, which comprises the following components in percentage by mass: 9.2-16.2 wt% of a high-activity auxiliary cementing material A, 49.4-53.5 wt% of a high-performance cementing material B and 30.3-41.4 wt% of a high-toughness auxiliary cementing material C. The high-activity auxiliary cementing material A is one or more of silica fume, slag or high-calcium fly ash; the high-performance cementing material B is high-iron-phase high-belite cement clinker, and the high-toughness auxiliary cementing material C is modified rubber powder. From the perspective of the cement clinker, the high-performance cementing material with high strength and large bending-compression ratio is prepared by adjusting the mineral composition of the cement clinker, optimizing the grain composition of the cement, adding the high-toughness auxiliary cementing material and the like, so that the problem of high brittleness of the cement-based material is fundamentally relieved.

The present application relates to the technical field of building materials, and particularly relates to a belite cement clinker, a preparation method thereof and a belite portland cement, the mineral composition of the belite cement clinker comprises: C3S 5%-60%, C2S 25%-80%, C3A 1%-8%, C4AF 5%-15%, C5S2Ṡ1-3%, C 10 S4ṠF21-3%, free calcium oxide is less than 1.0%, wherein, Ṡ represents sulfur trioxide. The belite cement clinker is used to prepare a cement product by adding appropriate amount of gypsum, the 3d strength of the cement product is between 13MPa and 35MPa, the 28d strength can reach 60MPa-70MPa, and the 56d strength is as high as 72MPa.

The application discloses a kind of water purification concrete, each component and the weight fraction it includes: cementitious material 30-55 parts, aggregate 65-95 parts, composite slurry 10-20 parts, air entraining agent 0.003-0.01 parts, water reducing agent 0.4-0.8 parts, mixing water 10-15 parts;The cementitious material includes γ-dicalcium silicate, slag and steel slag;The composite slurry is the mixed solution of chitosan and nanometer titanium dioxide.The water purification concrete in the application can significantly improve the water purification efficiency, realize self-cleaning, avoid concrete pore blockage, greatly extend the water permeability and water purification capacity of water purification concrete, has important economic and environmental benefits, and is suitable for popularization and application.

The invention discloses low-heat slag cement and a preparation method thereof. The cement is prepared from the following components in percentage by weight: 50%-70% of high belite Portland cement clinker, 20%-50% of active slag micropowder, 4%-6% of gypsum, 1%-5% of composite functional filler, 0.1%-1.0% of a construction performance regulator and 0.01%-0.1% of a grinding aid. The preparation method comprises the following steps: preparing the rapidly cooled high belite clinker; the slag and the sodium sulfate-triethanolamine composite exciting agent are jointly ground to prepare high-activity slag micro powder; all the components are jointly ground in proportion until the specific surface area is 300-400 m / kg, and the proportion of particles with the particle size of 3-30 microns is controlled to be larger than 70%. Through the synergistic effect of multiple components, low hydration heat (less than or equal to 230kJ / kg in 7 days), high early strength (more than or equal to 12MPa in 7 days) and high later strength (more than or equal to 32.5 MPa in 28 days) are realized at the same time, and the concrete has excellent chloride ion permeation resistance and sulfate attack resistance, is excellent in construction performance, and is particularly suitable for engineering construction of mass concrete and in a severe environment.

This invention discloses a rapid-hardening, high-toughness shotcrete and its spraying construction method, belonging to the field of concrete material technology. It employs a technical route of multi-component synergistic rapid-hardening – modified hybrid fiber toughening – three-stage synergistic expansion – three-phase distribution spraying method. The shotcrete material consists of powder, graded fine aggregate, polymer, high-performance liquid accelerator, and water. The graded fine aggregate forms a riprap skeleton; the high-belite aluminum sulfate cement and silicate cement compound lay the foundation for rapid hardening; the modified hybrid fibers construct a three-dimensional reinforcing network to achieve high toughness and crack resistance; the multi-component composite expansion agent compensates for shrinkage throughout all ages; and the micro-nano active admixtures and polymer optimize interfacial bonding performance. It is complemented by high-pressure airflow cleaning / nano-silicon ion impregnation of the substrate and a three-phase distribution spraying method of rapid-hardening cement paste – graded fine aggregate – liquid accelerator. The concrete of this invention combines rapid hardening, high strength, and high toughness and crack resistance, shortening response time and improving construction efficiency.

The invention discloses a special cementitious material for microwave-heated concrete, a preparation method thereof, and an application thereof, relating to the technical field of building materials. The cementitious material comprises components such as fly ash, steel slag, high-iron phase Portland cement clinker, high-belite sulfate cement clinker, gypsum, waste residue, solid waste, graphene, palmitic acid, and a water reducer. The high-iron phase Portland cement clinker contains more than 20% tetracalcium aluminoferrate and less than 3% tricalcium aluminate; the high-belite sulfate cement clinker contains more than 45% dicalcium silicate and 30-50% calcium sulfoaluminate. The cementitious material is made from specific solid waste, has excellent compressive strength, low resistivity, and high microwave heating efficiency, and can be used to prepare microwave-heated concrete.

The invention discloses a seawater mixing self-adaptive novel cementing material as well as a preparation method and application thereof. The cementing material comprises the following components in parts by weight: 30-70 parts of Portland cement, 20-50 parts of an auxiliary cementing material, 5-15 parts of high belite calcium sulphoaluminate cement clinker and / or high belite calcium aluminoferrite cement clinker, 6-14 parts of nano particle sol, 1-3 parts of a water reducing agent, 3-7 parts of a nano particle stabilizer and 28-50 parts of mixing water. The nano particle sol comprises nano silica sol and nano aluminum sol at the same time, and the silica sol and the aluminum sol are connected through-COO <-> formed by dehydration condensation of Si-OH on the surface of the silica sol and-COOH on the surface of the aluminum sol. The cementing material disclosed by the invention has the characteristics of high early strength, steadily improved later strength, strong chloride ion curing capacity and strong chloride ion erosion resistance, and shows excellent durability and seawater erosion resistance.

The invention relates to the technical field of construction materials, in particular to a clean preparation method of Portland cement clinker for concrete, which is characterized in that coal gangue and ardealite are used as raw materials, and low-heat Portland cement clinker is prepared by a preparation process of'low-temperature calcination + hydrothermal synthesis + low-temperature calcination '. The method comprises the following steps: S1, pretreatment; S2, ingredient design; s3, carrying out primary calcination; s4, carrying out hydrothermal synthesis; s5, carrying out secondary calcination; the Portland cement clinker is prepared from industrial solid wastes such as coal gangue and ardealite as raw materials, remarkable environmental protection and resource utilization benefits are achieved, clay and limestone are replaced with the solid wastes, ecological damage caused by mining is reduced, energy consumption is greatly reduced through the low-temperature calcination process compared with traditional cement production, no carbon dioxide is discharged in the whole process, and the method is environmentally friendly. The prepared low-heat Portland cement clinker takes dicalcium silicate and dicalcium aluminosilicate as main minerals, solid waste resources are fully utilized, and the ecological environment is facilitated.

To provide a powdery cement composition including a high content of fine limestone powder, i.e., a powdery cement composition capable of exhibiting high compression strength when used as a material for concrete or the like and excellent sulfate resistance.SOLUTION: There is provided a powdery cement composition comprising cement and fine limestone powder, i.e., a powdery cement composition whose mineral composition according to the Bogue's formula satisfying the following conditions: an alite content being 50 to 70 mass%, a belite content being 5 to 15 mass%, an aluminate phase content being 2 to 10 mass%, a total content of alite and belite being 60 to 80 mass%, and the mass ratio of alite relative to belite (alite / belite) being 5 to 10, and a fine limestone powder content in the powdery cement composition being 5 to 15 mass%.SELECTED DRAWING: None

The invention discloses a nano C-A-S-H seed crystal and a nano C-A-S-H enhanced low-content high-belite cement-slag cementing material, and belongs to the technical field of building materials. The raw materials of the nano C-A-S-H seed crystal comprise a silicon source, a calcium source, an aluminum source, polycarboxylic acid and alkali and are synthesized by adopting a chemical precipitation method, the Al / Si ratio is 0.5, the Ca / Si ratio is 1.2-2.0, and the water-solid ratio is (8-12): 1. The nano C-A-S-H enhanced low-doping-amount high-belite cement-slag cementing material disclosed by the invention comprises nano C-A-S-H seed crystals and a cementing material, wherein the doping amount of the nano C-A-S-H seed crystals is 1-3wt%; the cementing material comprises granulated blast furnace slag, high belite cement clinker and anhydrite. The nano C-A-S-H seed crystal is creatively doped into the low-doping-amount high-belite cement-slag cementing material, so that the early strength and construction efficiency of the material are remarkably improved, continuous increase of the later strength is guaranteed, meanwhile, efficient utilization of the low-doping-amount high-belite cement and the slag is realized, and the low-doping-amount high-belite cement-slag cementing material has excellent performance and environmental protection value.

The invention belongs to the technical field of building materials, and provides a waste incineration fly ash-based high belite sulphoaluminate cement clinker and a preparation method thereof. The clinker is prepared from the following raw materials in parts by mass: 32.25 to 34.25 parts of waste incineration fly ash, 41.34 to 43.34 parts of carbide slag, 0.36 to 2.36 parts of ferric oxide and 22.05 to 24.05 parts of bauxite tailings. According to the method, the waste incineration fly ash serves as a preparation raw material, the fly ash contains high-content calcium sulfate and heavy metal ions, the components enter C2S mineral lattices in the calcination process, lattice distortion is caused, and the activity of C2S is improved. Meanwhile, heavy metal ions in the fly ash are effectively solidified in a clinker mineral structure, the leaching risk of heavy metal and environmental pollution are reduced, and harmless treatment of the fly ash is achieved. The waste incineration fly ash based high belite sulphoaluminate cement clinker prepared by the preparation method disclosed by the invention has excellent early compressive strength.

The invention provides a solid waste-based cementing material as well as a preparation method and application thereof, and relates to the technical field of building materials. The solid waste-based cementing material comprises the following components in parts by weight: 35-45 parts of slag, 25-35 parts of modified oil shale residues, 15-25 parts of desulfurized gypsum and 1-12 parts of a modifier, wherein the modifying agent is prepared from calcium hydroxide and high belite sulphoaluminate cement. According to the solid waste-based cementing material, on the premise of ensuring that the solid waste-based cementing material has high strength in the early stage and the later stage, the setting time of the solid waste-based cementing material can be regulated and controlled according to actual engineering requirements. Meanwhile, main raw materials adopted by the invention are all industrial solid wastes, the industrial solid wastes can be stably utilized in a large proportion, efficient utilization of industrial solid waste resources is achieved, the P.O 42.5 cement strength standard can be reached only by doping a small amount of performance modifier, the production cost is remarkably reduced, and the environmental pressure is reduced.

The application belongs to the technical field of building materials, and particularly discloses a high-strength inorganic soil solidifying agent, a preparation method thereof and a high-strength soil solidifying material. The high-strength inorganic soil solidifying agent provided by the application takes high-free calcium belite sulphoaluminate clinker, gypsum and granulated blast furnace slag powder as main raw materials. The high-free calcium belite sulphoaluminate clinker provided by the application comprises the following mineral components: anhydrous calcium sulphoaluminate, free calcium sulphate, free calcium oxide, belite and iron phase. The application optimizes the mineral components of the high-free calcium belite sulphoaluminate clinker and the raw material composition of the high-strength inorganic soil solidifying agent, so that the high-strength inorganic soil solidifying agent can be used to prepare engineering materials with excellent unconfined compressive strength after solidifying soil. The application effectively solves the problems of low compressive strength and environmental unfriendliness of the existing soil solidifying material.

This application relates to the field of building materials technology, and discloses a dry-mixed quick-setting mortar for road repair and its preparation process. The mortar is made from a ternary cementitious system composed of sulfoaluminate cement, rapid-hardening silicate cement, and high-belite sulfoaluminate cement, combined with temperature-sensitive microporous mineral composite functional particles, graded fine sand, active admixtures, nano-calcium carbonate, quick-setting agent, and polypropylene fiber. The preparation process employs a two-step mixing process of low-speed premixing and secondary high-speed shear mixing. This invention utilizes the stepped hydration exothermic mechanism of the ternary cementitious system combined with the targeted slow-release mechanism of the temperature-sensitive particles to achieve adaptive control of setting time across the entire temperature range, overcoming the defect of uncontrolled hydration rate under extreme temperature differences. The resulting mortar possesses high early-stage strength and non-regressive later-stage strength, while exhibiting low drying shrinkage and high bonding strength between new and old interfaces, meeting the requirements for rapid all-weather road repair and long-term service.