67 results about "Belite" patented technology

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 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 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 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 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.

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 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.

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.

The invention discloses a special cementing material for anticorrosive concrete and a preparation method of the special cementing material, and relates to the technical field of building materials. The cementing material is prepared from the following components in parts by mass: 1 to 4 parts of candy pomace, 15 to 25 parts of tailings, 0.5 to 1.5 parts of a water reducing agent, 8 to 18 parts of furnace slag, 25 to 35 parts of novel low-calcium clinker, 3 to 9 parts of white mud, 2 to 6 parts of micro-plastic, 3 to 8 parts of titanium gypsum and 15 to 25 parts of aluminoferrite cement clinker, the mineral composition of the novel low-calcium clinker comprises 40%-50% of dicalcium silicate, 25%-30% of calcium sulphoaluminate, 3%-8% of calcium sulphosilicate, 3%-8% of tetra calcium aluminoferrite, 8%-15% of calcium sulfate and 1%-5% of free calcium oxide. A large amount of industrial solid waste is consumed, and the method has the advantages of being low in carbon, environmentally friendly and low in cost; through the synergistic effect of micro-expansion, close packing, conductive retardation and self-sealing carbonization, efficient comprehensive protection against various corrosion factors is achieved; the self-repairing and self-compacting capabilities are realized, so that the service life of a concrete structure in a harsh environment is remarkably prolonged.

The invention discloses a graphene / nano SiO2 synergistically enhanced self-repairing waterproof coating and a preparation method thereof, and belongs to the technical field of waterproof coatings and the technical field of building waterproof materials. The coating comprises a component A (liquid) and a component B (powder), wherein the mass ratio of the component A to the component B is 1: 1.2; the component A is composed of a high-weather-resistance emulsion, a graphene oxide / nano SiO2 synergistic dispersion and a functional aid, and the component B is composed of sulphoaluminate cement, high belite sulfate cement, high-alumina fly ash microspheres and a plurality of functional powders. Through the four-in-one design of the high-weather-resistance fluorosilicone-styrene-acrylic compound emulsion, GO (at) SiO2 interface bridging, sulphoaluminate-high belite continuous hydration and LDH-nano CaO reversible minerals, the seven major pain points that an existing waterproof coating is short in weather resistance, poor in interface, weak in freeze thawing, free of self-healing, acid-base brittleness, low-temperature cracking and not environmentally friendly are solved; the technical effects of 30-year exposure and weather resistance, 72-hour self-repairing efficiency greater than or equal to 95%, no crack at-20 DEG C and VOC less than or equal to 50g / L are achieved, and the waterproof coating is suitable for roof exposure waterproof engineering.

The application discloses a kind of dicalcium silicate-calcium sulphoaluminate-calcium sulphosilicate cement clinker and its industrialized preparation method, it is related to building material technical field, method includes steps: S1, raw material preparation, calcareous, siliceous and sulphuric raw materials are proportioned according to proportion, raw material rate value is limestone saturation coefficient 0.9~1.0, aluminium sulphur ratio ≤2.2, aluminium silicon ratio ≤1.0;S2, preheating decomposition, raw meal is handled by multistage cyclone preheater and decomposition furnace, the temperature of first-stage cyclone preheater outlet ≤310 ℃, the middle part temperature of decomposition furnace 770±10 ℃;S3, calcination, material enters rotary kiln, sintering zone temperature 1200~1250 ℃, weak oxidation or neutral atmosphere in kiln;S4, quenching, kiln clinker is cooled by grate cooler, 15~25min is cooled to 100 ℃ below from 1200~1250 ℃;S5, crushing storage, after cooling clinker is crushed and is stored, finished product is obtained, solve the problem that existing dicalcium silicate-calcium sulphoaluminate-calcium sulphosilicate cement clinker is easily decomposed at high temperature, sintering temperature zone is narrow, industrialized mineral composition fluctuation is big and kiln system is easily crust blocking.

The invention relates to the technical field of civil engineering infrastructure construction, and discloses a composite pile and a preparation method thereof.The composite pile comprises an outer pile and a core pile, the core pile is arranged in the middle of the outer pile and provided with a core pile surface, a plurality of pits are distributed in the core pile surface, and the pits are provided with pit edges at openings of the core pile surface; a secondary pit body structure of the inner surface of the pit is arranged on the inner wall face of the pit, a reserved pipeline is arranged in the middle of the core pile, one end of the reserved pipeline is located at the top of the core pile, and the other end of the reserved pipeline is communicated with the pit. Fe-gamma-C2S (iron modified gamma dicalcium silicate) is adopted to replace traditional Portland cement to serve as a cementing material of the outer pile. At the production end, the firing temperature of Fe-gamma-C2S and the saturation coefficient of limestone are both lower than those of Portland cement clinker, energy consumption is reduced from the source, industrial solid wastes such as fly ash, slag and steel slag can be synergistically consumed, and better carbon reduction and carbon sequestration effects on consumption of carbon dioxide are achieved.

The invention comprises a method of making lime, dolomitic lime, hydraulic cement such as portland cement clinker and co-products such as pozzolan, acids, alumina, silica and the like. The method comprises providing a natural calcium-iron-aluminosilicate mineral from one or more of hyaloclastite, lava, scoria, volcanic glass, volcanic ash, or any other mineral of a basaltic or intermediate chemical composition and reacting the hyaloclastite with a first hydrochloric acid to create a first salt, precipitating the calcium ions to react with OH− to form calcium hydroxide and heating the calcium hydroxide to create calcium oxide, alite and belite.

The invention discloses novel early-strength quick-hardening cement as well as a preparation method and application thereof, and belongs to the technical field of cement. The novel early-strength quick-hardening cement is prepared from the following components in parts by mass: 100 parts of a high belite sulphoaluminate cement base material, 2.5 to 3.5 parts of a hydrophobic modified polycarboxylic acid type anti-dispersing agent, 0.08 to 0.32 part of a nano composite early-strength synergistic body, 1.2 to 2.8 parts of a superfine slag powder modified coagulation control system and 23 to 27 parts of deionized water, the high belite sulphoaluminate cement base material is subjected to low-temperature activation treatment, the hydrophobic modified polycarboxylic acid type anti-dispersing agent is prepared from a polycarboxylic acid type anti-dispersing agent mother solution through hydrophobic modification, and the nano composite early strength synergistic body is a compound of nano silica fume and lithium carbonate-sodium metaaluminate. The superfine slag powder modified coagulation control system is a compound of dihydrate gypsum and superfine slag powder. The novel early-strength quick-hardening cement disclosed by the invention has durability, dispersion resistance and low-temperature adaptability, and the process is stable and controllable.

This invention is related to a cement clinker formed by firing raw meal prepared with new and improved raw meal minerals. This new cement clinker is a hydraulically activated cement clinker which can contain alite (tricalcium silicate) and aH' dicalcium silicate phase together with boron and fluorine doping and can be fired at lower temperatures and has lower carbon dioxide emission.

This invention discloses a method and system for online reconstruction of mineral phases in high-temperature steel slag, belonging to the field of steel slag resource utilization technology. The method involves crushing coal gangue and room-temperature steel slag to a particle size of 0.5 to 3 mm, mixing them at a mass ratio of 1:0.5 to 1.5 to prepare a reconstruction adjuster, and then adding the reconstruction adjuster and high-temperature liquid steel slag (temperature above 1350℃) to a mixing furnace at a mass ratio of 0.1 to 0.5:1. After settling, the mineral phase reconstruction is completed, converting free calcium oxide into dicalcium silicate and tricalcium silicate, magnesium oxide, ferrous oxide, and manganese oxide into the RO phase, and ferric oxide into ferrous oxide and elemental iron. The mixture after the reaction is cooled to below 500℃, then crushed, magnetically separated, and ground to a specific surface area of ​​400 square meters per kilogram to obtain a cementitious material. This invention utilizes the sensible heat of the high-temperature steel slag itself, eliminating the need for additional heating, achieving high-value utilization of solid waste. The prepared cementitious material exhibits high hydration activity and good volume stability. The process is simple and easy to implement, contributing to the metallurgical industry's achievement of dual-carbon goals.

The invention discloses a solid waste-based self-healing mine filling material and a preparation method and application thereof, and belongs to the technical field of solid waste resource utilization, the solid waste-based self-healing mine filling material comprises the following components by weight: 35-40% of a solid waste-based material, 2-3% of a self-healing master batch A, 3-5% of a self-healing master batch B, 8-13% of semi-dry desulfurization ash, and 40-50% of tailing sand; when crack water seepage occurs after hydration of the solid-waste-based self-healing mine filling material is completed, a silanol group of sodium methyl silicate in the self-healing master batch B and dicalcium silicate and tricalcium silicate in the solid-waste-based cementing material are subjected to a dehydration cross-linking reaction, and anti-permeability silicate with an anti-capillary effect is formed; the excessive anti-permeability silicate is further dissolved and reacted by the polyether silicone oil to form a charge reduction-anti-permeability composite material, so that capillary channels are sealed while internal gaps are filled, and the compactness of the mine filling material hydrate is further improved.

The application discloses a fully recyclable concrete and a preparation method and a recycling method thereof, which are characterized by fully mixing silicate cement, limestone coarse aggregate, river sand, limestone machine-made sand, copper residue, metakaolin and a water reducing agent, adding water and stirring uniformly to obtain the fully recyclable concrete, wherein the fully recyclable concrete can be directly regenerated into high belite cement clinker and recycled after being crushed and calcined after service, and the cement clinker obtained has good hardening performance and low calcination temperature.

The application provides a sludge solidification method, and belongs to the technical field of solid waste resource utilization and building materials. The method realizes time sequence separation of physical water absorption and chemical solidification through "dynamic mixing amount adjustment + material stewing process", effectively solving the "water stealing contradiction" in high water content sludge treatment. The core steps include: real-time monitoring of sludge water content and dynamic calculation of expanded perlite mixing amount based on a nonlinear function; converting free water into bound water through material stewing; then mixing a multi-source solid waste-based solidifying agent composed of high belite sulphoaluminate cement, slag powder, carbide slag and gypsum; finally, adding a phosphogypsum-based group particle toughening agent and a shrinkage control agent. The solidified material prepared by the application realizes the unity of high strength, high toughness and low shrinkage rate, and the utilization rate of industrial solid waste is significantly improved, and is suitable for roadbed filling, foundation treatment and engineering backfilling.

The invention discloses a method for preparing high-activity belite cement by using electrolytic manganese residues, which comprises the following steps: respectively grinding limestone, sandstone, iron ore soil and electrolytic manganese residues to pass through a 0.088 mm square hole sieve, and uniformly mixing to obtain a cement raw material; adding water into the raw material, uniformly stirring, and pressing the mixed semi-wet material into a cubic sample by using a mold; calcining the obtained cubic sample in a high-temperature furnace, and then cooling the cubic sample into cement clinker in a quenching manner; grinding the cement clinker, mixing the ground cement clinker with desulfurized gypsum, and levigating the mixture in a ball mill to 350 + / -20 m < 2 > / kg to obtain a cement finished product; the early strength of the prepared cement is remarkably improved (3d compressive strength is 13.3-19.9 MPa and is improved by 30%-60% compared with that of conventional belite cement), 28d compressive strength is 47.9-50.4 MPa, hydration heat is low (3d hydration heat release is smaller than or equal to 200 kJ / kg), and the requirements of mass concrete and severe environment engineering can be met.

The invention belongs to the technical field of building materials, and particularly discloses a low-carbon sound insulation and heat preservation material and a preparation method thereof. The special high-free-calcium belite sulphoaluminate clinker, various industrial by-product gypsum, granulated blast furnace slag powder and other industrial wastes are used as main raw materials, and microbeads, light sand, floating beads and rubber particles are added as main composite fillers; the performance of the low-carbon sound insulation and heat preservation material is finely adjusted by using the water reducing agent, the retarder, the cellulose ether, the defoaming agent and the redispersible rubber powder, so that the obtained sound insulation and heat preservation material can achieve an excellent sound insulation effect, and the sound insulation and heat preservation material provided by the invention not only has an excellent sound insulation effect, but also has good heat preservation and mechanical properties. The problem that a mortar material in the prior art cannot give consideration to heat preservation, sound insulation and mechanical properties is effectively solved.

The application relates to the technical field of cement materials, and particularly discloses a high ore fused stone ferrite aluminate cement material and a preparation method thereof. The cement material is prepared by jointly grinding and treating high belite ferrite aluminate cement clinker and a modifier. The modifier is composed of succinyl phosphonate, a quaternary ammonium salt and an aluminum source. The molecular formula of the succinyl phosphonate is HOOC-CH2-CH2-CO(PO3H2). The modifier composed of succinyl phosphonate, a quaternary ammonium salt and an aluminum source is used to perform mechanochemical coupling modification on the belite ferrite aluminate cement clinker, multi-level interface interaction occurs under the induction of mechanical force, directional poisoning and growth inhibition of calcium aluminate crystal nuclei are realized, the early strength of the cement is maintained, and the volume stability of the cement material is significantly improved.

The invention discloses a high-performance repairing material and a preparation method and application thereof, and belongs to the technical field of building materials and structural durability repairing, the high-performance repairing material comprises a component A and a component B, the component A comprises high belite sulphoaluminate cement, nano silicon dioxide, a polycarboxylic acid anti-freezing water reducing agent, a nano self-repairing component, a polycarboxylic acid sodium salt dispersing agent and quartz sand; the component B comprises an anti-freezing agent, water and a functional anti-erosion agent. The repairing material prepared by the invention forms compact C-(A)-S-H gel in situ in an interface area and constructs multiple barriers of hydrophobic, compact and barrier, and has good construction adaptability, early mechanical property and durability at the temperature of-20 DEG C or above under the action of salinized environment and freeze-thaw cycle; and the concrete has excellent freeze-thaw cycle resistance, and is suitable for durability repair of cold-region infrastructures such as ultrahigh-voltage power transmission tower footing and expressway roadbed.

The invention discloses large-diameter maritime work pile foundation high-durability low-heat concrete and a preparation method thereof, and particularly relates to the technical field of building materials. The concrete is prepared from high belite sulphoaluminate cement, nano silicon dioxide, nano graphene oxide, self-repairing microcapsules, granulated blast furnace mineral powder, fly ash, maritime work waste materials and coarse and fine aggregates. The preparation method comprises the following steps: firstly, pre-dispersing the nano material and the mineral admixture to prepare nano composite slurry; premixing the microcapsules and dry fine quartz sand to form a protective layer; uniformly dry-mixing the cement, the waste material and the aggregate; sequentially adding the nano slurry, the water and the water reducing agent, and fully wet-mixing; finally, the microcapsule mixture is mixed at a low speed. Through the synergistic effect of multiple components, hydration heat and internal temperature rise are remarkably reduced, and generation of temperature cracks is inhibited; the filling and enhancing effect of the nano material, the self-repairing function of the microcapsule and the utilization of waste resources are realized.

The invention discloses slag-sulphoaluminate compound gelled seawater and sea sand mortar and a preparation method thereof, and relates to the technical field of building materials. Comprising the following component raw materials: 180-220 parts of functional aggregate; 100 parts of a cementing material; 40 to 50 parts of a functional mixing liquid; the functionalized aggregate is sea sand loaded with a nanocrystalline seed layer on the surface; the cementing material is prepared from granulated blast furnace slag powder, natural anhydrite and high belite sulphoaluminate cement clinker; the functionalized mixing liquid is seawater or artificial seawater dissolved with a composite thixotropic-flocculating agent. According to the scheme, the core problems of low strength and poor durability caused by interface looseness and erosion medium permeation of the seawater and sea sand concrete are solved; and full resource utilization of the seawater, the sea sand and the slag is realized, and high performance, high durability and remarkable economic benefits are achieved.

The application provides a prefabricated wind power mixed tower high-strength anti-permeable slurry and a preparation method thereof. The high-strength anti-permeable slurry is composed of the following raw materials in parts by weight: early-strength Portland cement 400-500 parts, high-Belite sulphoaluminate cement 100-150 parts, finely selected graded quartz sand 550-650 parts, rice husk ash-based amorphous silica admixture 80-120 parts, high-molecular-weight polyethylene fiber 8-15 parts, silane coupling agent 1-2 parts, pigment 0.5-2 parts, and waterproof anti-permeable component 40-65 parts. The application has the following beneficial effects. The application optimizes the aggregate grading to improve the strength and compactness, and focuses on the synergistic effect of the waterproof component. The application has the characteristics of high early strength, excellent anti-permeability, high bonding strength, strong weather resistance, and convenient construction, and can accurately adapt to the anti-permeable sealing treatment of the prefabricated wind power mixed tower horizontal joint seat slurry, hoisting, and pointing. The application effectively solves the horizontal joint leakage problem, meets the appearance requirements of different construction scenes, and guarantees the safety and stability of the wind power mixed tower structure.

The invention discloses an underwater anti-dispersion cement-based grouting repair material and a preparation method thereof. The grouting repair material comprises a liquid material polyurethane prepolymer and a powder material, the polyurethane prepolymer is prepared by mixing a polyol oligomer, diisocyanate, a hydrophilic chain extender and a catalyst, and the powder material comprises cement, high belite cement, a mineral admixture, aggregate, an anti-dispersing agent, an expanding agent, a water reducing agent, a powder waterproof agent, a defoaming agent and a reinforcing agent. According to the invention, the setting time of the grouting material is regulated and controlled by adjusting the type and proportion of the cement; the polyurethane prepolymer and the cement paste have a synergistic effect, and under the flowing water condition, the dispersion resistance of the slurry can be remarkably enhanced through the synergistic effect of the polyurethane prepolymer and the cement paste, and the slurry loss phenomenon is effectively reduced; the grouting repair material disclosed by the invention is applied to the repair process of hydraulic structures, and has the characteristics of realization of regulation and control of setting time within a certain range, high strength, strong bonding force of new and old interfaces, excellent dispersion resistance and the like.

This invention relates to an iron-rich belite sulfoaluminate cement and its preparation method using iron tailings and fluorogypsum. The method comprises iron-rich belite sulfoaluminate cement clinker and natural gypsum in a mass ratio of 100:(6-18). The raw materials for the iron-rich belite sulfoaluminate cement clinker, by mass percentage, include 15-18% iron tailings, 6-10% fluorogypsum, 20-23% steel slag, 12-14% alumina ash, and 39-43% limestone. This invention utilizes iron tailings, fluorogypsum, steel slag, alumina ash, and limestone to synergistically provide the required calcium, silicon, aluminum, iron, and sulfur. The addition of a certain amount of natural gypsum facilitates the hydration of the iron-rich belite sulfoaluminate cement clinker to generate the target hydration products. By controlling the proportions of each raw material, the resulting cement exhibits excellent mechanical properties. This invention reduces the consumption of natural raw materials, lowers raw material costs, and has a simple preparation method, making it suitable for industrialization.