74 results about "Tricalcium silicate" patented technology

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 relates to a low-carbon high-performance cement clinker and a preparation method thereof. Relates to the technical field of building materials, in particular to a low-carbon cement clinker and a preparation method thereof. The cement clinker comprises the following raw material components in percentage by weight: 75-90% of a raw material, 5-20% of steel slag and 2-8% of a tempering material, and the tempering material comprises at least two of lead-zinc slag, copper slag, manganese slag and lithium slag. The weight percentage of the lead-zinc slag in the tempering material is 0-5.5% according to the oxide ZnO; the weight percentage content of the copper slag is 0-2.0% based on the oxide CuO; the weight percentage of the manganese slag is 0-7.0% in terms of oxide MnO2; and the weight percentage content of the lithium slag is 0-3.0 wt% according to the oxide Li2O. The tempering material is added, the purposes of stabilizing R-type tricalcium silicate and improving the strength of the clinker are achieved by guaranteeing the content of zinc or copper or manganese or lithium in the clinker, components such as fluorine and sulfur which pollute the environment are not additionally added, the clinker is environmentally friendly, safe and reliable, and the used raw materials are wide in source and high in applicability.

The invention belongs to the technical field of building materials, and particularly provides a low-carbon energy-saving fiberboard, which is prepared from the following components in parts by weight: 8 to 38 parts of steel slag, 12 to 36 parts of fly ash, 0 to 20 parts of cement, 10 to 48 parts of desulfurized gypsum, 2 to 4 parts of silica fume, 3 to 9 parts of quartz tail mud, 6 to 10 parts of dry paper pulp fiber, 0.1 to 0.48 part of gypsum retarder, 0.48 to 1.20 parts of alkali activator and 0.01 to 4.32 parts of modifier. According to the fiberboard, solid waste is adopted as a main material, an alkaline activator is adopted to excite a reaction and promote generation of calcium aluminum sulfate and other minerals, a modifier is adopted to enhance the water resistance of a gypsum-based product, recycled paper is adopted to replace part of raw paper, the production cost is reduced, fiber directional distribution is improved, and the longitudinal and transverse fracture resistance ratio of the fiberboard is increased. The steel slag pre-carbonization can effectively eliminate free calcium oxide and magnesium oxide in the steel slag, and reduces the damage of the later hydration expansion of the active alkali to the structure. And the uncarbonized tricalcium silicate and dicalcium silicate in the material are hydrated to form hydrated calcium silicate, calcium aluminum sulfate and other minerals through steam normal-pressure curing.

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 discloses copper selenide / tricalcium silicate bone cement. The bone cement comprises a liquid phase component and a solid phase component, the liquid phase component is water, and the solid phase component is tricalcium silicate powder and copper selenide nanoparticles. Compared with the existing tricalcium silicate bone cement, the tricalcium silicate bone cement has the advantages that by introducing a trace amount of copper selenide nanoparticles, not only can the hydration and coagulation time of tricalcium silicate be shortened, but also the porosity and degradation rate of the tricalcium silicate after coagulation and solidification can be reduced, the compressive strength can be improved, the stimulation effect on ALP activity of MC3T3-E1 cells can be enhanced, the survival rate of the MC3T3-E1 cells can be improved, and the application prospect is broad. The immunogenic apoptosis of K7M2-wt cells is promoted, and the tumor growth rate is reduced. Besides, the introduction of the copper selenide nanoparticles can also endow the tricalcium silicate bone cement with the performance of temperature rise under near-infrared light, so that in clinical application, the tricalcium silicate bone cement can be further combined with a near-infrared technology to realize ablation of bone tumors, and a new strategy is provided for treatment of the bone tumors.

The invention relates to an early strength concrete material for an expansion joint anchoring area and a preparation method thereof, and relates to the technical field of building materials, the early strength concrete material for the expansion joint anchoring area comprises the following components in parts by mass: gel master batch, coarse aggregate, fine aggregate, silica fume, mineral powder and a polycarboxylic acid water reducer; the gelling master batch is prepared from the following components in parts by mass: tricalcium silicate, anhydrous calcium sulphoaluminate, polyvinyl alcohol, polypropylene fiber and water; the preparation method comprises the steps of gelling master batch preparation, shearing and flaking, and mixing and forming. According to the early-strength concrete material for the expansion joint anchoring area and the preparation method of the early-strength concrete material, the concrete in the anchoring area is modified by using an organic matter as a crystal nucleus, so that a compact and ordered organic-inorganic cross-linked structure with a biomimetic structure is formed, and the early-strength performance and tensile toughness of the concrete are remarkably improved.

The invention belongs to the technical field of building materials, and particularly relates to a low-calcium carbon sequestration cementing material as well as a preparation method and application thereof. The low-calcium carbon sequestration cementing material disclosed by the invention is prepared from the following main mineral components in percentage by weight: 55 to 80 percent of calcium silicate, 15 to 35 percent of tricalcium disilicate and 5 to 15 percent of gehlenite. The low-calcium carbon-sequestration cementing material has excellent carbonization activity, can seal a large amount of carbon dioxide, can obtain excellent mechanical properties in a short time, and provides a new way for solving the problem of carbon emission in the cement industry and recycling industrial solid wastes such as magnesium slag and fly ash.

The invention discloses a preparation method of a cement mineral-water glass composite grouting material, which comprises the following steps: (1) dispersing graphene oxide in isopropanol, then adding glassy calcium silicate particles, stirring to uniformly coat the surfaces of the glassy calcium silicate particles with the graphene oxide to obtain a mixed solution; and adding nano silicon dioxide, uniformly mixing, and carrying out solid-liquid separation to obtain a solid product for later use. And (2) adding the solid product into a saturated sodium hydroxide and / or potassium hydroxide solution, then heating and preserving heat, and then carrying out solid-liquid separation to obtain sodium silicate and / or potassium-graphene oxide-glassy calcium silicate. And (3) uniformly mixing the sodium silicate and / or potassium-graphene oxide-glassy calcium silicate with cement minerals tricalcium silicate, dicalcium silicate and water to obtain the composite grouting material. According to the cement-water glass double-liquid grouting material, the problems that the performance of the grouting material is unstable and the strength is degraded due to the fact that water glass of a traditional cement-water glass double-liquid grouting material is prone to dissociation are effectively solved.

The application discloses a low-carbon high-performance cement clinker and a preparation method thereof, and relates to the technical field of building materials, in particular to a low-carbon cement clinker and a preparation method thereof. The raw materials in the cement clinker include the following components in percentage by weight: 75-90% of raw material, 5-20% of steel slag and 2-8% of a conditioning material, wherein the conditioning material includes at least two of lead-zinc slag, copper slag, manganese slag and lithium slag. The lead-zinc slag in the conditioning material contains 0-5.5% of ZnO in percentage by weight; the copper slag contains 0-2.0% of CuO in percentage by weight; the manganese slag contains 0-7.0% of MnO2 in percentage by weight; and the lithium slag contains 0-3.0% of Li2O in percentage by weight. The application adds the conditioning material, ensures the content of zinc, copper, manganese or lithium in the cement clinker, realizes the purposes of stabilizing R-type tricalcium silicate and improving the strength of the cement clinker, does not add components such as fluorine and sulfur which pollute the environment, is environmentally-friendly, safe and reliable, and has a wide source of raw materials and strong applicability.

The invention relates to the technical field of building materials, and particularly discloses sulfur-aluminum-iron series cement and a preparation method thereof. The sulfur-aluminum-iron series cement is prepared from the following raw materials: 55 to 65 parts of sulfur-aluminum-iron series cement clinker, 10 to 15 parts of gypsum, 5 to 10 parts of silane modified metakaolin, 10 to 15 parts of superfine slag powder, 3 to 5 parts of filler and 1 part of surface modified graphene dispersion liquid, the sulfur-aluminum-iron series cement clinker comprises the following mineral components: 25%-30% of anhydrous calcium sulphoaluminate, 20%-25% of tetra calcium aluminoferrite, 15%-20% of dicalcium silicate, 5%-8% of tricalcium silicate and less than or equal to 1.5% of free calcium oxide. The mechanical property of a cement system is improved by limiting the mineral components and proportion of the sulfur-aluminum-iron series cement clinker; the active admixture and the filler are adopted to fill internal capillary pores of a cement system, so that erosion medium invasion channels are reduced, the compactness is enhanced, and meanwhile, the structure of a hydration product is optimized.

The application discloses an expanding root canal filling medical device combination based on a dental root tip biological seal and application. The medical device combination comprises a sealant combination and a titanium material root canal plug tip, the sealant combination is composed of liquid agent, A component powder and B component powder which are mutually isolated before use, the A component powder comprises 75-95% of tricalcium silicate and 5-25% of beta tricalcium phosphate, the B component powder comprises 45-55% of nano zirconium dioxide, 44.7-52% of calcium hydroxide and 0.3-3% of calcium oxide; a root canal section surface of the root canal plug tip is provided with a horizontal screw thread, a screw thread groove of the screw thread is used for filling the prepared sealant, and a crown section surface is provided with a retaining groove section. The medical device combination solves the problems of root canal treatment failure or poor long-term curative effect caused by volume shrinkage after filling of the existing sealant and gutta-percha tip, and can realize high safety, high biocompatibility, high quality and high density root canal filling.

The application discloses a preparation method of waste wood regenerated aggregate concrete, which comprises the following steps: (1) diluting glycerol with anhydrous ethanol to form a base solution, and then adding magnesium potassium phosphate cement, tricalcium silicate powder, sodium alginate powder and fly ash into the base solution to uniformly disperse and form a slurry; then, the slurry is coated on the surface of wood aggregate, and after being dried, modified wood aggregate is obtained; (2) mixing basalt fibers with an alkali solution and then performing heat preservation, and after completion, the basalt fibers are washed to obtain modified basalt fibers; then, the modified basalt fibers, the modified wood aggregate, ordinary Portland cement, gravel, sand, fly ash, a water reducing agent and mixing water are uniformly mixed to obtain a concrete slurry. The technical scheme of the application effectively improves the strength of the concrete containing wood aggregate, and is beneficial to promoting the popularization and application of waste wood in concrete.

The invention discloses a method for regulating and controlling the dissolution rate of tricalcium silicate in an erosive ion environment. According to the method, nano sol is added into tricalcium silicate in an erosive ion environment containing magnesium ions and chloride ions, and ultrasonic catalysis is assisted, so that the dissolution rate of tricalcium silicate is regulated and controlled, a hydration system of the cementing material is stabilized, the influence of erosive ions on early dissolution and long-term durability of the cementing material is relieved, and the service life of the cementing material is prolonged. The application of the cementing material in ocean engineering is facilitated.

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

The present invention relates to the technical field of medium-heat cement, and discloses a medium-heat tensile cement and a preparation method thereof, comprising calcium oxide, calcium silicate, dicalcium silicate, tricalcium silicate, tricalcium aluminate, tetracalcium aluminoferrate, metakaolin, iron ore powder, modified cotton stalk fiber, modified nano-silicon dioxide, sulfur trioxide and magnesium oxide. The present invention effectively improves the early compressive strength, flexural strength and splitting tensile strength of cement by using modified cotton stalk fiber, and reduces the damage of modified cotton stalk fiber under alkaline conditions by using nano-silicon dioxide, thereby improving the durability of cement. At the same time, the amide group grafted on the surface of the modified nano-silicon dioxide reacts with the hydroxyl group on the surface of the modified cotton stalk fiber to form a strong hydrogen bond, thereby further improving the tensile strength of cement and improving the mechanical properties of cement.

The application discloses a kind of high-strength slow-setting silicate cement clinker and preparation method thereof, its mineral composition includes C3S>63%, C2S 1.09%‑13.39%, C3A<4.7%, C4AF 13.73%‑14.36%, free calcium oxide content in clinker is below 1.5%.The application reduces aluminum rate from the angle of mineral composition design, improves limestone saturation coefficient, and prepares a kind of low alumina tricalcium (C3A<4.7%), high silicate tricalcium (C3S>63%) clinker using industrial solid waste coal gangue, which can be prepared under existing cement production process, and has the characteristics of high strength, stable expansion and shrinkage performance, low early hydration heat release, long setting time and easy to control, etc.

The invention discloses an early strength type filling material containing superfine tail mud. The filling material comprises the superfine tail mud and a gel material, wherein the weight ratio of the superfine tail mud to the gel material is (3.5-5): 1; the gel material comprises the following components in parts by weight: 45-55 parts of blast furnace water-quenched slag; 30-40 parts of converter steel slag; 5-15 parts of a desulfurization by-product; 1-3 parts of an additive; the admixture is prepared from the following components in parts by weight: 12 to 23 parts of tricalcium silicate, 24 to 28 parts of calcium silicate, 11 to 27 parts of tricalcium aluminate, 3 to 12 parts of tetra calcium aluminoferrite, 5 to 15 parts of silica fume, 3 to 8 parts of dodecacalcium heptaaluminate, 3 to 8 parts of methyl polycarboxylic acid, 3 to 12 parts of vinyl acetate and 3 to 10 parts of calcium chloride. According to the method, the utilization rate of the superfine tail mud is fully increased, meanwhile, the early strength of a filling body is larger than or equal to 1 MPa in one day, and the problems of superfine tail mud stockpiling and filling mining are reasonably solved.

The application relates to the technical field of building materials, and particularly discloses a sulphur-aluminum-iron cement and a preparation method thereof. The sulphur-aluminum-iron cement comprises the following raw materials: 55-65 parts of sulphur-aluminum-iron cement clinker, 10-15 parts of gypsum, 5-10 parts of silane modified metakaolin, 10-15 parts of superfine slag powder, 3-5 parts of filling material and 1 part of surface modified graphene dispersion liquid. The sulphur-aluminum-iron cement clinker comprises the following mineral components: 32-38% of anhydrous calcium sulphoaluminate, 26-32% of tetracalcium aluminoferrite, 20-26% of dicalcium silicate, 6-10% of tricalcium silicate and less than or equal to 1.5% of free calcium oxide. The application limits the mineral components and the proportion of the sulphur-aluminum-iron cement clinker, so that the mechanical properties of the cement system are improved; the active admixture and the filling material are used to fill the internal capillary holes of the cement system, the invasion channels of the erosion medium are reduced, the compactness is enhanced, and the structure of the hydration product is optimized.

The present invention relates to a phosphogypsum modified material for highways under a new excitation system, and a preparation method and device thereof, belonging to the technical field of highway engineering in transportation engineering. The modified material comprises the following raw materials in weight percentage: 80% to 90% phosphogypsum, 10% to 20% modifier, totaling 100%; it also comprises water, the mass of which is 15% to 18% of the total mass of the phosphogypsum and the activator; the modifier comprises the following raw materials: calcium oxide, silicon dioxide, ferric oxide, aluminum oxide, mineral powder, tricalcium silicate, calcium carbonate, sodium silicate, coupling agent, iron powder, and rubber powder. The phosphogypsum modified material of the present invention also exhibits the advantages of excellent strength growth and improved stability in terms of long-term performance development, is highly environmentally friendly, does not pollute the environment, soil, and water bodies, and is economical, does not increase the overall cost of the project, and is easy to promote and apply.

The invention discloses a cementitious material containing clay minerals. The cementitious material comprises the following components in parts by weight: 55-60 parts of clay minerals; 10-20 parts of a flue gas desulfurization byproduct; 10-20 parts of converter steel slag; 5-10 parts of a modifier; the modifier is prepared from the following components in parts by weight: 20 to 25 parts of calcium silicate, 10 to 25 parts of tricalcium aluminate, 1 to 5 parts of nano aluminum oxide, 10 to 15 parts of tricalcium silicate, 5 to 15 parts of tetra calcium aluminoferrite, 2 to 6 parts of methyl polycarboxylic acid and 1 to 5 parts of vinyl acetate. Compared with the existing cement clinker or solid waste-based cementing material, the cementing material containing the clay mineral provided by the invention is prepared from the clay mineral, the desulfurization by-product, the steel slag, the modifier and the like as raw materials, and the cement clinker and slag are not added, so that the cost of the raw materials is greatly reduced, and the cementing material containing the clay mineral has good compressive strength.

The invention relates to the technical field of cement admixtures, in particular to a high-temperature reinforced and toughened oil well cement admixture and a preparation method thereof. The toughening agent is prepared on the basis of polyimide fibers with the surfaces grafted with tricalcium silicate, wollastonite fibers and mullite whiskers; preparing a high-temperature stabilizer based on the calcined shale powder and nano aluminum oxide; preparing a dispersing agent; the carbon nanotubes and the halloysite nanotubes are modified, meanwhile, the modification process is adjusted in real time to improve the modification effect, and reinforcing and toughening components are prepared; and finally, mixing according to a preset proportion to obtain the high-temperature reinforced and toughened oil well cement admixture. The cement admixture disclosed by the invention is composed of the toughening agent, the high-temperature stabilizer, the dispersing agent and the reinforcing and toughening component, and the cement admixture can effectively improve the high-temperature reinforcing and toughening effect of oil well cement.

The present invention discloses a method for preparing general-purpose Portland cement clinker using ferronickel slag leaching residue, relating to the fields of environmental protection and building materials. The method comprises: first, mixing ferronickel slag sulfuric acid leaching residue with blast furnace slag, lime, and a regulator, ball-milling the mixture, and then calcining it at high temperature; then rapidly cooling the calcined product; and finally grinding it to produce Portland cement clinker. The present invention utilizes a high-temperature multiphase reaction to convert the raw material into a cement phase containing active components such as tricalcium silicate, dicalcium silicate, and tetracalcium aluminoferrite. The ferronickel slag sulfuric acid leaching residue has a very small particle size and does not require grinding, allowing for large amounts of slag to be added and easily burned through. The main performance indicators of the produced Portland cement clinker meet the national standards for general-purpose Portland cement clinker. The present invention has important reference value for reducing the amount of ferronickel slag and has excellent market prospects and promotion value.

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.

The invention provides a tailing-based controlled release type soil conditioner, and relates to the field of solid waste recycling. Comprising a silicon-calcium-magnesium alkaline core and a coating layer arranged on the surface of the silicon-calcium-magnesium alkaline core, the coating layer comprises an iron-aluminum controlled release layer and a silicon-calcium-magnesium alkaline layer which are sequentially and alternately stacked, and the outermost layer of the coating layer is the iron-aluminum controlled release layer; each of the silicon-calcium-magnesium alkaline core and the silicon-calcium-magnesium alkaline layer comprises a silicon-calcium-magnesium alkaline material and a first binder; the silicon-calcium-magnesium alkaline material comprises the following components: calcium silicate, dicalcium silicate, tricalcium silicate, diopside, enstatite, forsterite, calcium-magnesium melilite and calcium-aluminum melilite; the iron-aluminum controlled release layer comprises an iron-aluminum controlled release material and a second binder; the iron and aluminum controlled release material is prepared from alpha-FeOOH and gamma-AlOOH; the silicon-calcium-magnesium alkaline material and the iron-aluminum controlled-release material are both prepared from tailings. According to the tailing-based controlled release type soil conditioner, valuable elements in tailings are fully utilized, and controllable release of valuable components in soil with different pH values can be achieved.

The invention discloses a metallurgical slag synergistic modification treatment method, which belongs to the field of solid waste treatment, and comprises the following steps: mixing liquid blast furnace slag and liquid steel slag according to a ratio of (1.5-2.5): 1, carrying out an oxidation-reduction reaction on carbon and sulfide reducing substances in the blast furnace slag and iron oxide in the steel slag, and carrying out natural sinking and floating separation, the mixed slag tends to be layered from top to bottom according to different densities, and sequentially comprises calcium phosphate, calcium silicate, dicalcium silicate, tricalcium silicate, calcium ferrite and molten iron from top to bottom; part of dicalcium silicate and slag above are poured into a slag tank to be subjected to slag flushing treatment, the rest dicalcium silicate, tricalcium silicate, calcium ferrite and molten iron are conveyed to a converter to be smelted, dicalcium silicate, tricalcium silicate and calcium ferrite serve as slag formers for dephosphorization and desiliconization of the converter, and dephosphorization and desiliconization in the earlier stage of converter smelting are promoted. The two kinds of slag are subjected to cooperative treatment, the reduction characteristic of the blast furnace slag is utilized, steel slag metal elements are fully recycled, and all slag components are recycled and reasonably utilized in a high-value mode.

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 invention relates to the technical field of cement clinker production and CO2 capture, and particularly discloses a process and equipment for graded calcination and CO2 capture of semi-dry cement clinker, and the process combines the technology of preparing tricalcium silicate through semi-suspension preheating in a rotary kiln, light roasting of dicalcium silicate, synchronous and direct capture of high-concentration or high-purity CO2 and oxygen-enriched calcination. After being specifically treated, raw material powder enters a self-gravity dispersion type semi-suspended raw material preheating three-blade rotary kiln to be preheated, and then enters a closed electric heating three-blade rotary kiln capable of capturing CO2 and light burning dicalcium silicate. By controlling the electric heating condition, the uniform cross solid-phase reaction is realized, and CO2 is captured. The process solves the problem caused by material layering of a conventional novel dry-method preheater, reduces the loss of powdery materials, and effectively controls the ratio of raw materials to clinker. Meanwhile, high-concentration CO2 can be directly captured, and compared with other technologies, the investment is saved, the operation cost is reduced, the energy-saving and emission-reducing effects are remarkable, and the operation is simple.

The application discloses an injectable anti-disintegration paste material and a preparation method and application thereof, and belongs to the field of biomedical materials. The paste material comprises a powder component and a liquid component. The powder component comprises tricalcium silicate powder, beta-tricalcium phosphate powder and anhydrous calcium dihydrogen phosphate. The liquid component is a hydroxypropyl methylcellulose aqueous solution with a mass percentage concentration of 1-3%. The mass ratio of the powder component to the liquid component of the paste material is 1.5-2.5:1. The prepared injectable anti-disintegration paste material has excellent anti-disintegration performance and injection performance, can be self-cured quickly, is convenient to operate and easy to fill, can prevent the paste from being eroded by a water-containing environment, can induce the generation of bone-like hydroxyapatite, and can be used in the field of dental repair such as pulp capping, root tip shaping and root canal treatment.

The invention relates to a phosphogypsum modified material for a highway under a new excitation system and a preparation method and device thereof, and belongs to the technical field of highway engineering in traffic transportation engineering. The modified material comprises the following raw materials in percentage by weight: 80-90% of phosphogypsum and 10-20% of a modifier, totaling 100%, the mass of the water is 15%-18% of the total mass of the phosphogypsum and the exciting agent; the modifier comprises the following raw materials: calcium oxide, silicon dioxide, ferric oxide, aluminum oxide, mineral powder, tricalcium silicate, calcium carbonate, sodium silicate, a coupling agent, iron powder and rubber powder. The ardealite modified material has the advantages of excellent strength increase and stability improvement in the aspect of long-term performance development, is high in environmental protection property, free of pollution to the environment, soil and water, good in economical efficiency and easy to popularize and apply, and does not increase the comprehensive construction cost of a project.