119 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 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 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 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 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 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 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.

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 application belongs to the technical field of building materials, and particularly discloses a semi-flexible pavement grouting material, a preparation method and a use method thereof. The semi-flexible pavement grouting material comprises the following raw material components: high-free calcium belite sulphoaluminate clinker, gypsum, granulated blast furnace slag powder and fly ash cenospheres; wherein the high-free calcium belite sulphoaluminate clinker comprises the following mineral components: anhydrous calcium sulphoaluminate, free calcium sulphate, free calcium oxide, belite and iron phase. The application uses a large amount of industrial waste such as gypsum, granulated blast furnace slag powder, fly ash cenospheres and steel slag powder as main raw materials, and adds high-free calcium belite sulphoaluminate clinker, amorphous calcium aluminate and silica fume and the like, so as to utilize the synergistic effect of the components and prepare a high-strength semi-flexible pavement grouting material. The application effectively solves the problems of low strength, poor water resistance and poor durability of the grouting material under a large amount of gypsum.

The present invention discloses a high-temperature resistant cementing slurry system for 10,000-meter deep wells, relating to the technical field of cementing materials for oil and gas well engineering. The cementing slurry system of the present invention comprises the following components, measured by weight: 100 parts of low-heat Portland cement, 10-20 parts of an anti-abnormal gelling material, 35-55 parts of an enhanced anti-fading material, 10-20 parts of a suspended fluid loss reducer, 6-8 parts of a high-temperature fluid loss reducer, and 2-5 parts of a high-temperature retarder; wherein the anti-abnormal gelling material comprises, by weight, ulexite: colemanite: ulexite: chollastone = (40-60): (20-40): (10-20): (5-15). The present invention reduces the hydration rate of the slurry under high-temperature conditions by limiting the dicalcium silicate content in the cement components and reducing the specific surface area of ​​the cement, thereby suppressing the rapid abnormal gelling of the cement slurry. The anti-abnormal gelling material, based on the perspective of cement hydration products, addresses the abnormal gelling effect of cement mineral component fluctuations in different batches on the cement slurry, while also ensuring stable control of other properties of the slurry.

The invention belongs to the technical field of building materials, and particularly discloses a low-carbon waste-utilizing high-performance ceramic tile adhesive and a preparation method thereof. The low-carbon waste-utilizing high-performance ceramic tile adhesive is mainly prepared from high-free-calcium belite sulphoaluminate clinker, granulated blast-furnace slag powder, gypsum and sand. The high-free-calcium belite sulphoaluminate clinker is applied to the ceramic tile adhesive, and the raw materials of the ceramic tile adhesive are further reasonably designed, so that the 28d tensile adhesive strength of the prepared ceramic tile adhesive and the tensile adhesive strength of the prepared ceramic tile adhesive after freeze-thaw cycle, soaking, thermal aging and airing for 20 minutes are both greater than or equal to 2 MPa, and the tensile adhesive strength of the prepared ceramic tile adhesive after freeze-thaw cycle, soaking, thermal aging and airing for 20 minutes is greater than or equal to 2 MPa. And the prepared ceramic tile adhesive has excellent strength, heat resistance, water resistance and freezing resistance.

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 invention relates to the technical field of building materials, and particularly discloses a high-free-calcium belite sulphoaluminate clinker, a preparation method, a high-strength water-resistant anti-freezing inorganic self-leveling material and application. The high free calcium belite sulphoaluminate clinker is prepared from the following mineral components in percentage by mass: 25.31 percent to 33.27 percent of anhydrous calcium sulphoaluminate, 6.55 percent to 12.26 percent of free calcium sulfate, 14.82 percent to 19.71 percent of free calcium oxide, 27.27 percent to 33.87 percent of belite and 3.04 percent to 6.08 percent of an iron phase. The synergistic effect of the high-free-calcium belite sulphoaluminate clinker and the granulated blast-furnace slag powder can improve the type, composition and microstructure of hydration products of the gypsum-based material, greatly increases the water-resistant and high-strength hydration products ettringite and C-(A)-S-H, and realizes dense coating of the ettringite and C-(A)-S-H on dihydrate gypsum at the same time; therefore, the problems of poor water resistance, poor freezing resistance and low strength of a gypsum-based self-leveling material are solved.

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 application discloses an integrated cementing material for high-performance low-carbon concrete, which is obtained by uniformly mixing the following raw materials in parts by weight: 35-40 parts of Portland cement clinker powder; 5-6 parts of high-calcium high-iron belite sulphoaluminate cement clinker powder; 5-10 parts of fine limestone powder; 14-20 parts of fine fly ash; 10-15 parts of slag powder; 10-15 parts of steel slag powder; and 5-10 parts of coarse limestone powder. The ingredient parameters of the high-calcium high-iron high-belite sulphoaluminate cement clinker are as follows: the basicity coefficient Cm value is 1.60-1.65, fCaO is 0.5-1.0%, and fSO3 is 0.5-1.0%; the mineral composition is as follows: C2S is 50-60%, C4A3S is 20-25%, C6AF2 is 10-15%, and C 12 A7 is 5-10%. The integrated cementing material has a cement clinker content as low as 33-38%, and the 28d strength can reach 41.0-42.0 MPa.

The invention relates to the technical field of building materials, in particular to super-hydrophobic modified high belite sulphoaluminate cement mortar and a preparation method thereof. The preparation method comprises the following steps: mixing fine sand and nano silicon dioxide, carrying out first stirring treatment, adding high belite sulphoaluminate cement and synthetic fibers, and carrying out second stirring treatment to obtain a dry material mixture; the preparation method comprises the following steps: adding hydroxyl-terminated polydimethylsiloxane, tetraethoxysilane and dibutyltin dilaurate into water, and carrying out emulsification treatment to obtain a low-surface-energy emulsion; the dry material mixture and the low surface energy emulsion are mixed, and the super-hydrophobic modified high belite sulphoaluminate cement mortar is obtained. The preparation method has the advantages of quick effect, convenience in preparation, environment friendliness, no toxicity and the like, and provides support for good application of the super-hydrophobic material in the field of building materials.

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.