800 results about "Calcium aluminates" patented technology

The invention discloses a yellow phosphorus tailing-based mine filling material and application thereof. The yellow phosphorus tailing-based mine filling material comprises aggregate and a cementing material, the cementing material comprises the following components in parts by mass: 5-20 parts of red mud, 20-40 parts of yellow phosphorus slag, 10-30 parts of slag, 5-10 parts of fly ash, 5-10 parts of a compound exciting agent, 1-3 parts of an early strength agent and 2-5 parts of a water-retaining agent; wherein the compound exciting agent comprises the following components in parts by mass: 10-20 parts of sodium metasilicate, 30-40 parts of gypsum powder, 20-30 parts of sodium sulfate, 5-10 parts of carbide slag and 5-10 parts of silica fume; according to the invention, the raw materials are compounded and the specific exciting agent is subjected to depolymerization-polycondensation reaction to obtain a cementing material containing Aft (ettringite), C-S-H gel (hydrated calcium silicate gel) and C-A-S-H gel (hydrated calcium aluminosilicate gel), and finally, the mine filling material with high fluidity, low bleeding rate and high strength is obtained while yellow phosphorus tailing solid waste is treated.

The invention relates to 390mm * 510mm section bloom B3 grinding ball steel and a preparation method thereof, and the preparation method comprises the following steps: loading a certain amount of molten iron and scrap steel for primary smelting in a converter, and sequentially adding an aluminum ingot, an alloy, pre-melting type calcium aluminate and refined lime when 1 / 4 of the steel is tapped; carrying out LF refining on the tapping molten steel subjected to primary smelting in the converter to obtain refined molten steel; the refined molten steel is subjected to RH vacuum refining, and RH vacuum refined molten steel is obtained through superheat degree control, RH working vacuum degree control, retention time control and soft blowing time control; and continuous casting is conducted, specifically, the RH vacuum refined molten steel is subjected to set pulling speed, crystallizer and tail end electromagnetic stirring and soft reduction treatment according to the pouring section, and the bloom B3 grinding ball steel with the section being 390 mm * 510 mm is obtained. According to the method, the converter primary smelting, the LF refining, the RH vacuum refining and the molten steel whole-process protection pouring smelting process are controlled, the cleanliness of the molten steel is guaranteed, and generation of large-particle inclusions is avoided; and process parameters are reasonably set in the continuous casting process, so that the internal quality of the bloom is obviously improved, and the production efficiency is greatly improved.

The invention provides a concrete super-early-strength quick-hardening material, and relates to the field of building materials. The high-strength concrete comprises the following components in percentage by mass: 40%-50% of calcium aluminate, 30%-40% of gypsum, 8%-15% of high aluminum, 1%-3% of an additive, 3%-12% of an exciting agent and 1%-5% of an auxiliary material. According to the super-early-strength quick-hardening material provided by the invention, hour-level strength can be quickly and stably improved, and the strength increasing curve of each age is smooth and stable, so that the requirements of scenes such as road repair and tunnel construction on early strength can be met; it can be guaranteed that the 28-day compressive strength of the material breaks through 70 MPa, the later strength is kept stable, and the long-term safety of an engineering structure is guaranteed; the anti-seepage, anti-freezing and anti-erosion capabilities are realized in a complex environment, the service life of a project can be effectively prolonged, and the maintenance cost is reduced. In addition, the invention further provides a preparation method of the concrete super-early-strength and quick-hardening material, and the preparation method is used for preparing the super-early-strength and quick-hardening material provided by the invention.

The invention relates to the technical field of castable, and discloses a silicon carbide castable which comprises main materials and auxiliary materials, the main materials comprise 30-70 parts of silicon carbide particles, 5-20 parts of micro powder which is silicon carbide micro powder, 5-20 parts of nano aluminum oxide, 5-20 parts of a phase change material and 5-20 parts of reinforced fibers, and the auxiliary materials comprise a binding agent, an additive, a heat stabilizer, a high-heat-conductivity additive and an antioxidant. The phase-change material is a metal alloy phase-change material, and the reinforcing fiber is 5-20 parts of steel fiber. The binding agent is 10-15 parts of pure calcium aluminate cement, and the additive is 3-5 parts. In the preparation process of the silicon carbide castable, the steel fiber, the metal alloy phase change material and the graphite are added, the overall performance of the silicon carbide castable can be remarkably improved, the steel fiber can remarkably improve the toughness and mechanical strength of the silicon carbide castable, the castable can be effectively prevented from being heated to deform at a high temperature, shrinkage is inhibited, and a good prevention and treatment effect on microcracks is achieved; therefore, the overall stability and durability of the pouring material are improved.

The invention belongs to the technical field of new building materials, and provides a low-alkalinity and early-strength ardealite filling and curing material and a preparation method thereof.The low-alkalinity and early-strength ardealite filling and curing material is prepared from ardealite, a curing agent and water, the curing agent comprises silica fume, limestone powder, superfine granulated blast furnace slag powder, metakaolin, calcium aluminate powder, Portland cement clinker powder, a suspension stabilizer and hydroxypropyl methyl cellulose ether. The problems of delayed coagulation, low early strength and high alkalinity of a common cement-based ardealite filling material can be solved, and the technical requirements of ardealite cemented filling are met.

The invention belongs to the field of modified self-repairing calcium aluminate cement 3D printing, and particularly relates to a phosphate modified self-repairing calcium aluminate cement 3D printing material and a preparation method thereof. The phosphate modified self-repairing calcium aluminate cement 3D printing material prepared by the invention is prepared from the following raw materials in parts by mass: 60 to 70 parts of calcium aluminate cement, 3 to 7 parts of silica fume, 2 to 4 parts of metakaolin, 0.5 to 3.5 parts of double-template modified calcium bentonite, 0.8 to 1.5 parts of amino modified sodium polyphosphate and 0.15 to 0.8 part of basalt fiber. The invention relates to a concrete anti-microbial agent, which is prepared from the following raw materials in parts by weight: 20-30 parts of water, 20-30 parts of water, 20-30 parts of water, 20-30 parts of nano calcium carbonate, 20-30 parts of nano calcium carbonate, 20-30 parts of magnesium phosphate cement coated bacteria-loaded porous microspheres, 20-30 parts of a polycarboxylate superplasticizer, 20-30 parts of an organic silicon defoaming agent and 25-35 parts of mixing water. The technical-economic cooperation requirement of building 3D printing under complex working conditions is met, and various indexes of phosphate modified calcium aluminate cement applied to the 3D printing technology are met.

The invention discloses a high-ground-temperature-resistant ultrahigh-flow nano-modified polymer grouting material as well as a preparation method and application of the high-ground-temperature-resistant ultrahigh-flow nano-modified polymer grouting material, and belongs to the technical field of geotechnical engineering. According to the present invention, the nanometer modified cementation particles are combined with the calcium hydroxide, the sodium carbonate, the cellulose nanofiber and the tannic acid to regulate and control the hydration process, the fluidity and the mechanical strength, the nanometer modified cementation particles are injected into the deep surrounding rock, the high fluidity can be maintained in the high ground temperature environment for a long time, the grouting diffusion range is effectively expanded, and the accurate regulation and control of the grouting material gelling time can be achieved. Meanwhile, high-mass-fraction fly ash and silica fume are excited to generate calcium aluminosilicate hydration products, and the problems that an existing conventional calcium silicate grouting cementing material is poor in reinforcing and anti-seepage effect in a high-ground-temperature environment, slurry is prone to cracking and the like are solved.

The invention provides a CO2 mineralized cementing material based on steel slag-mineral slag-fly ash multi-element solid waste and a preparation method, and relates to the technical field of building materials. The CO2 mineralized cementing material based on the steel slag-slag-fly ash multi-element solid waste is prepared from the following raw materials in parts by mass: 10 to 15 parts of steel slag, 30 to 40 parts of slag, 50 to 60 parts of slag fly ash, 5 to 20 parts of gypsum, 1 to 5 parts of clinker, 1 to 5 parts of cement, 5 to 20 parts of exciting agent, 4 to 6 parts of cross-linking agent composition, 0.1 to 0.5 part of alkaline water and 0.1 to 0.5 part of defoaming agent. According to the invention, the steel slag, the furnace slag and the furnace slag fly ash are excited by adopting a composite exciting agent of aluminum sulfate, calcium aluminate and sodium hydroxide, the problem of early strength is successfully solved through alkali excitation and aluminate excitation, the proportion of the exciting agent is reasonably configured, the effect of the exciting agent is exerted to the maximum extent, and the mechanical strength of the CO2 mineralized cementing material is improved.

The invention discloses fiber reinforced concrete for bridge deck pavement and a preparation method thereof, and belongs to the technical field of concrete. The fiber reinforced concrete is prepared from the following raw materials: Portland cement, modified basalt fiber, a slow-release mineralizer, a stress-oriented dispersing aid and the like. The modified basalt fiber is a basalt fiber which is subjected to amino silanization through a silane coupling agent KH-550 and then is catalytically grafted with ethylenediamine tetraacetic acid and hydroxyethyl methylacrylate through DCC (dicyclohexylcarbodiimide); the slow-release mineralizer comprises calcium sulphoaluminate and silicon-based coated nano calcium sulfate; the silicon-based coated nano calcium sulfate is core-shell structure powder formed by coating a nano calcium sulfate core material with a silicon dioxide shell layer; the concrete is strong in interface bonding, excellent in dynamic fatigue resistance, good in durability and stable in volume, and the problem that the mechanical property, the durability and the dynamic anti-interference capability of the concrete cannot be considered at the same time is solved.

The invention provides a concrete composite expanding agent and a preparation method thereof, and belongs to the field of concrete admixtures. The concrete composite expanding agent comprises modified phosphogypsum, fly ash, bauxite, a modified oxide and an auxiliary agent, and is obtained by uniformly mixing the modified phosphogypsum, the fly ash, the bauxite, the modified oxide and the auxiliary agent which have different specific surface areas. According to the composite expanding agent, the modified ardealite and the fly ash synergistically provide an early-stage expansion source, early-stage shrinkage of concrete is compensated through calcium sulphoaluminate hydration products, meanwhile, modified magnesium oxide serves as a later-stage expansion source, magnesium hydroxide is generated through slow hydration, and long-term expansion compensation is achieved; the device has the advantages of good strength, compensation capability and the like; a large amount of industrial waste residues such as ardealite and fly ash are utilized, high-added-value utilization of the industrial waste residues is achieved, and remarkable economic benefits are achieved.

The invention relates to the technical field of concrete waterproofing agents, in particular to a high-efficiency concrete anti-crack waterproofing agent and a preparation method thereof, and the high-efficiency concrete anti-crack waterproofing agent is prepared from the following raw materials in parts by weight: a calcium sulphoaluminate expanding agent; light burning of magnesium oxide; re-burning the magnesium oxide; nano-scale silicon dioxide; metakaolin; polypropylene fibers; basalt fibers; styrene-acrylic emulsion; a silane emulsion; silica fume; hydroxypropyl methyl cellulose; and a polycarboxylic acid water reducer compatilizer. According to the high-efficiency concrete anti-crack waterproof agent disclosed by the invention, the nano-silica, the metakaolin and the styrene-acrylic emulsion synergistically block nano-to-macroscopic multi-stage pores, so that double waterproofing of physical filling and chemical film forming is realized; the polypropylene and the basalt fiber are subjected to ultrasonic dispersion and interface combination optimization to form a three-dimensional anti-crack network, the component uniformity and the functional stability are ensured through precise proportioning, graded mixing and directional granulation, meanwhile, the waterproof agent is compatible with industrial production fluctuation, large-scale application reliability is ensured, and the problems that a traditional waterproof agent is single in function and insufficient in durability are solved.

The invention discloses multi-source composite expansion super-early-strength concrete and a preparation method thereof. The concrete comprises a cementing material, aggregate, a water reducing agent, water and a multi-source composite expansion system. The expansion system is composed of a plastic expansion agent, a calcium sulphoaluminate early expansion source, a magnesium oxide delayed expansion source and an internal curing material. Through precise component design and function time sequence matching, a cooperative compensation network covering the whole life cycle of the concrete is constructed, a plastic expanding agent inhibits plastic shrinkage, calcium sulphoaluminate compensates early-stage self-shrinkage, magnesium oxide resists medium-and-long-term drying shrinkage, an internal curing material provides continuous moisture guarantee for the above process, and the overall performance of the concrete is improved. And the efficiency of each expansion source is excited and coupled. According to the invention, seamless and accurate shrinkage compensation from a plastic stage to a service later stage can be realized on the premise of ensuring the super early strength characteristic of the concrete, the technical problem that the super early strength concrete is easy to crack due to severe shrinkage is fundamentally solved, and the volume stability and durability of the structure are remarkably improved.

The invention relates to the technical field of refractory materials, in particular to a waste magnesia-calcium brick-containing refractory material and a preparation method thereof, and the waste magnesia-calcium brick-containing refractory material comprises the following components: composite aggregate, calcium aluminate cement, urea resin-aluminum dihydrogen phosphate, active alpha-Al2O3 micro powder, silica micro powder and sodium tripolyphosphate. In the room-temperature spraying maintenance and low-temperature working stage, hydration of free CaO in the waste magnesia-calcium bricks and erosion of OH <-> are prevented through the hydrophobic effect of fluorinated polyphosphazene and modified zirconium oxide sol, and the compatibility and wettability of the composite aggregate and cement paste are improved through carboxylic acid groups of carboxyethyl silanetriol and polyethylene glycol monomethyl ether. According to the present invention, with the temperature rising, the aluminum dihydrogen phosphate forms the viscous liquid phase to wrap the aggregate so as to provide the temporary protection, the temperature continues to rise, the zirconium oxide and the nanometer Al2O3 react with the CaO and the MgO to generate the CaZrO3 and the MgAl2O3, the aluminum dihydrogen phosphate reacts with the nanometer Al2O3 in the system to generate the AlPO4, and the CaZrO3, the MgAl2O3 and the AlPO4 form the multi-phase fire-resistant structure so as to further improve the fire resistance of the fire-resistant material;

The invention relates to the technical field of refractory materials, and discloses a rotary kiln lining refractory material and a preparation method thereof, the raw materials comprise mullite, boron carbide, calcium hexaluminate, silicon carbide, silica powder, alpha-alumina micro powder, coating powder, modified refractory fiber, and a binder. The mullite and the boron carbide are selected as base materials and have excellent acid corrosion resistance, the titanium dioxide and the aluminum oxide are used for treating the refractory fibers, so that a compact enrichment layer is formed, low-temperature sintering is promoted by adding the yttrium oxide, the titanium dioxide is introduced into the refractory fibers, and the corrosion resistance of the refractory fibers is improved. And micropores in the fiber surface can be blocked, so that the porosity of the refractory material is reduced, and the diffusion path of acid steam is prolonged. The refractory material provided by the invention has excellent high-temperature stability and corrosion resistance.

The invention discloses a permeable laminated grid ecological bank protection material suitable for improvement of a dredged soil green material and a preparation method of the permeable laminated grid ecological bank protection material. The preparation method comprises the following steps that S1, a dredged soil green improver and dredged soil are evenly mixed in a dry mode, and homogeneous slurry is formed after stirring; s2, injecting the homogenized slurry into a mold, and pressing the homogenized slurry into hollow laminated grid units through a hydraulic forming machine; and S3, the permeable laminated grid units are naturally cured, and the permeable laminated grid ecological bank protection material suitable for improvement of the dredged soil green materials is formed. According to the invention, the dredged soil is taken as a matrix, and the mechanical property and ecological compatibility of the dredged soil are remarkably improved by adding the composite modifier composed of 11 components such as the steel slag micro powder, the red mud activator, the calcium sulphoaluminate expanding agent and the active magnesium oxide and combining the design of the three-layer permeable laminated grid structure.

The invention belongs to the technical field of building materials, and particularly relates to a micro-expansion anti-cracking waterproof composite deep groove filler and a preparation method thereof. The micro-bulking anti-cracking waterproof composite deep groove filler provided by the invention comprises cement, gypsum, mineral powder, nano silicon oxide, coarse aggregate, fine aggregate, modified fibers, an expanding agent, a polycarboxylate superplasticizer and water. According to the invention, polyacrylamide, calcium sulphoaluminate and magnesium oxide are adopted to jointly form an expanding agent, and early-stage-late-stage full-period shrinkage compensation is jointly formed in a concrete hydration process, so that the density of the concrete is effectively improved, and the waterproof performance of the concrete is further improved; according to the invention, sodium dodecyl benzene sulfonate and propylene glycol block polyether are adopted to carry out compound modification on graphene oxide, and gamma-aminopropyltriethoxysilane is connected to the surface of basalt fiber, so that the bonding strength of basalt fiber and a cement matrix and the compactness of the cement matrix are improved, and the waterproof and anti-cracking properties of concrete are further improved.

The invention discloses anti-cracking concrete and a preparation method thereof, and the anti-cracking concrete is prepared from the following raw materials in parts by weight: 400-450 parts of cement, 600-700 parts of fine aggregate, 900-1000 parts of gravel, 70-80 parts of a composite additive, 30-40 parts of modified fiber, 4-5 parts of a water reducing agent and 160-180 parts of water, the composite additive is prepared from fly ash, modified sepiolite, calcium sulphoaluminate and an air entraining agent; the modified sepiolite is obtained by taking sepiolite as a raw material, pretreating the sepiolite through a silane coupling agent and then sequentially reacting the pretreated sepiolite with sulfanilamide and dodecyl chloride. According to the invention, through the synergistic effect of the composite additive and the modified fiber, the comprehensive improvement of the crack resistance and mechanical strength of the concrete is realized, in the composite additive, the moderate expansion of calcium sulphoaluminate compensates the early shrinkage stress, the microbubble system formed by the air entraining agent relieves the stress concentration, and the dispersion effect of the polycarboxylate superplasticizer is matched, so that the crack resistance and mechanical strength of the concrete are improved. The hardened body forms a compact and uniform microstructure, and the tensile strength of the concrete is improved.

The invention relates to the technical field of cement-based materials, in particular to a slow-release accelerator for a cement-based filling material as well as a preparation method and application of the slow-release accelerator. The slow-release accelerator comprises a calcium aluminate inner core and a cellulose first-stage shell layer coating the surface of the inner core, and the surface of the first-stage shell layer is further coated with a nano silicon dioxide second-stage shell layer. After the slow-release accelerator is doped into a filling cementing powder-based filling material, the external first-stage shell layer and the external second-stage shell layer are preferentially consumed in the pumping process, so that the accelerator calcium aluminate inner core is prevented from being consumed in the pumping process, and the problems of pipe blockage and the like caused by premature coagulation of the filling material are avoided.

The invention relates to the field of furnace lining materials, in particular to a rapid repairing material for a tapping hole and a furnace lining of an intermediate frequency furnace. The rapid repairing material comprises the following components in parts by weight: 50-70 parts of tabular corundum, 10-20 parts of fused magnesite, 8-15 parts of alumina micro powder, 3-8 parts of nano zirconia, 5-12 parts of silicon carbide, 10-15 parts of silica sol and 2-5 parts of a reinforcing agent. Wherein the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride. The tabular corundum is mainly used as an integral framework; the fused magnesite is matched with the alumina micro powder to form magnesium aluminate spinel with a high melting point; the nano zirconium oxide can fill pores and is excellent in toughness; the silicon carbide has the advantages of high hardness, high thermal conductivity and high melting point; the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride, although the adding amount is small, the high-temperature strength, toughness and thermal shock resistance of the repairing material can be remarkably improved, and especially the long-term corrosion resistance can be remarkably improved.

The invention discloses a super-early-strength shrinkage-free high-crack-resistance tunnel spraying repair material in the technical field of civil engineering materials, which comprises the following raw materials in percentage by mass: 35-45% of sulphoaluminate cement; 8%-12% of a superfine early strength admixture; 2%-3% of a calcium sulphoaluminate expanding agent; 1%-2% of a magnesium oxide-based expanding agent; 1-2% of a calcium-magnesium composite expanding agent; 10%-15% of hollow glass beads; 1.5%-2.5% of copper plated steel fiber; 0.1%-0.3% of polypropylene fiber; 25%-30% of graded quartz sand; 0.5%-1.0% of a polycarboxylic acid water reducing agent; 3%-5% of an alkali-free liquid accelerator; 0.3%-0.8% of a thixotropic agent; and 0.1%-0.3% of a thickening time control agent. According to the method, a multi-scale performance cooperative regulation system is innovatively constructed. Through accurate control of the hydration process of a gel system, a shrinkage stress multi-stage compensation mechanism and systematic integration of a fiber-matrix interface strengthening technology, the mutual restriction relationship among early strength development, volume stability and crack resistance of a traditional material is broken through.

The invention discloses a preparation method of high-basicity polyaluminum chloride, which comprises the following steps: by taking hydrochloric acid with the mass fraction of 30% and aluminum hydroxide as raw materials, adding solid polyaluminum chloride into a chitosan-blended kaolin solution which is 2-5 times of the total amount of the solid polyaluminum chloride, then adding a hydroxyapatite agent which is 10-15% of the total amount of the solid polyaluminum chloride, and fully stirring to obtain the high-basicity polyaluminum chloride. And carrying out suction filtration and drying to obtain the high-basicity polyaluminum chloride. According to the high-basicity polyaluminum chloride disclosed by the invention, hydrochloric acid and aluminum hydroxide are adopted as raw materials and are matched with calcium carbonate powder and calcium aluminate powder to prepare solid polyaluminum chloride, and then chitosan is blended with kaolin liquid and a hydroxyapatite agent for coordination and synergism, so that the high-basicity polyaluminum chloride is prepared through the coordination and synergism of the raw materials; the C0D, turbidity and heavy metal removal rate of the obtained high-basicity polyaluminum chloride product are improved in a balanced manner, and meanwhile, the durability and stability effects of the product are remarkable.

The invention discloses a corundum high-strength wear-resistant castable, which belongs to the field of castable, and comprises a raw material, an auxiliary material, a binding agent and an additive, the raw material is corundum aggregate, and the auxiliary material comprises corundum fine powder, mullite fine powder, an inorganic non-metallic material and stainless steel fiber, the binding agent comprises calcium aluminate cement, hydrated alumina, silica sol, aluminum dihydrogen phosphate and refractory clay, and the additives comprise sintered spinel fine powder, silica micropowder, activated alumina micropowder, zirconia micropowder, a coagulant, a retarder, a dispersant, a flocculant, a plasticizer, a water-retaining agent, an anti-settling agent and a preservative. The corundum high-strength wear-resistant castable is prepared by mixing the raw materials, the auxiliary materials, the binding agent and the additive, so that the corundum high-strength wear-resistant castable has excellent strength, wear resistance, fire resistance and thermal shock resistance during use, and further the actual use effect and performance of the corundum high-strength wear-resistant castable are ensured; and the service life of the product is prolonged.

The invention relates to sulfur silicate cement and a preparation method thereof. Relates to the technical field of cement. Comprising sulfur silicate clinker, gypsum, a mixed material and a performance adjusting component, the sulfur silicate cement comprises the following components in parts by mass: 50-90 parts of sulfur silicate clinker, 4-25 parts of gypsum, 5-50 parts of a mixed material and 0-5 parts of a performance adjusting component. The mineral composition of the sulfur silicate clinker is as follows: 15 to 50 weight percent of calcium sulphoaluminate, 5 to 50 weight percent of calcium sulphosilicate, 10 to 70 weight percent of dicalcium silicate, 2 to 15 weight percent of free gypsum and 0 to 2 weight percent of free lime; the 45-micron screen residue of the sulfur silicate clinker is less than or equal to 25%. According to the invention, under the condition that the mineral composition of the sulfur silicate clinker is changed, the hydration degree of the clinker is improved and the consumption of the clinker is saved by compounding the proper gypsum and the admixture, the clinker coefficient can reach 0.5-1, and the cement cost and carbon emission are effectively reduced.

The invention provides a mixed type shield synchronous grouting material and a grouting process, and relates to the technical field of building materials, the grouting material is composed of fast hydration Portland cement, activated aluminosilicate minerals, nanometer silicon powder, bentonite, a reversible thixotropic polymer, a delayed hydration agent, coated calcium aluminate fast setting powder and a coated silicate gel precursor. The early-stage reaction is inhibited by delaying hydration, and a controllable solidification sequence of slurry from a flowable stage, a rearrangement structure stage to a rapid solidification stage is realized by breaking a membrane under the action of temperature or pressure gradient. In the process, by monitoring the conductivity, the concentration of Ca < 2 + > / Mg < 2 + > and the temperature in real time, the adding amount of an additive and grouting parameters are automatically adjusted, so that the stable diffusivity of the material is kept and the curing speed is accelerated under different stratum conditions. The solidified body forms a C-S-H, C-A-S-H and N-A-S-H gel interpenetrating network, the permeability coefficient is low, the water dispersion resistance is high, and the shield grouting quality and the tunnel structure safety can be remarkably improved.

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 discloses an anti-erosion Al2O3-SiC-C slag runner castable containing pyrophyllite and a preparation method of the anti-erosion Al2O3-SiC-C slag runner castable, and belongs to the technical field of refractory materials. The Al2O3-SiC-C slag trough castable is mainly prepared from the following raw materials in percentage by mass: 30 to 45 percent of high-alumina clinker, 20 to 35 percent of pyrophyllite, 8 to 15 percent of silicon carbide, 5 to 10 percent of kyanite, 5 to 10 percent of graphite electrode powder, 3 to 6 percent of active Al2O3 micro powder, 2 to 4 percent of silicon micro powder, 1.5 to 2.5 percent of antioxidant, 3 to 5 percent of pure calcium aluminate cement and 1.5 to 2.5 percent of asphalt. In addition, explosion-proof fibers accounting for 0.03-0.15% of the total weight of all the raw materials and a water reducing agent accounting for 0.05-0.15% of the total weight of all the raw materials are added. The anti-erosion Al2O3-SiC-C slag runner castable is prepared by mixing the weighed raw materials uniformly and then obtaining the anti-erosion Al2O3-SiC-C slag runner castable. The Al2O3-SiC-C slag runner castable prepared by the method can completely meet the requirements of the use performance of the Al2O3-SiC-C slag runner castable, and the Al2O3-SiC-C slag runner castable can be well applied to a blast furnace casting house; meanwhile, the cost is reduced, and remarkable social benefits and economic benefits are achieved.

The invention discloses anti-crack and anti-alpine concrete and a preparation method thereof, and relates to the technical field of concrete.The anti-crack and anti-alpine concrete is prepared from, by mass, 300-500 parts of low-heat Portland cement, 50-100 parts of carbon sequestration composite superfine powder and 10-20 parts of nano calcium carbonate; the magnesium oxide is calcined at the temperature of 500 to 600 DEG C, is compounded with the calcium sulphoaluminate, and is modified by a silane coupling agent; the phase change microcapsule is formed by packaging paraffin in a silicon dioxide shell layer, and the phase change temperature ranges from-30 DEG C to 10 DEG C; the microbial self-repairing capsule is characterized in that bacillus pasteurii is coated in a sodium alginate-montmorillonite composite carrier; according to the invention, the multi-dimensional performance breakthrough of the high-cold concrete is realized through gradient expanding agent compounding, fiber synergistic enhancement, phase change microcapsule temperature control and microbial self-repairing technologies. The drying shrinkage is reduced to 1.2 * 10 <-4 > by compounding magnesium oxide / calcium sulphoaluminate, the crack propagation is inhibited by a fiber network, and the initial crack threshold value is less than 0.15 mm.

The invention belongs to the technical field of refractory materials, and discloses a high-temperature high-strength ceramic wear-resistant castable as well as a preparation method and a construction method thereof. The high-temperature high-strength ceramic wear-resistant castable is prepared from the following raw materials in percentage by mass: 14 to 22 percent of mullite with the particle size of 8 to 5mm, 16 to 24 percent of mullite with the particle size of 5 to 3mm, 13 to 18 percent of brown aluminum oxide with the particle size of 3 to 1mm, 12 to 19 percent of brown aluminum oxide with the particle size of 1 to 0.074 mm, 16 to 25 percent of brown aluminum oxide with the particle size of less than or equal to 0.074 mm, 3 to 7 percent of activated aluminum oxide powder, 4 to 7 percent of submicron SiO2 powder and 0.3 to 0.6 percent of pure calcium aluminate cement, and rare earth modified titanium-aluminum alloy fibers accounting for 1-1.5% of the total mass of the raw materials, a water reducing agent accounting for 0.05-0.15% of the total mass of the raw materials, explosion-proof fibers accounting for 0.03-0.1% of the total mass of the raw materials and water accounting for 3.5-4.5% of the The submicron SiO2 powder is used as a binding agent to endow the castable with certain normal-temperature strength, the activated alumina powder is combined to provide high-temperature strength, the brown fused alumina and the sintered mullite are used as aggregates, and the rare earth modified titanium aluminum steel fibers are combined to endow the castable with high-temperature, high-strength and wear-resistant properties.

The present invention relates to a method for co - processing and resource utilization of overhaul slag, fly ash, and desulfurized gypsum. The method comprises the following steps: Step 1) dehydrate and then dry the desulfurized gypsum, add calcium carbonate to the dried desulfurized gypsum, and collect SO3 gas; Step 2) carry out an autoclave reaction on the SO3 gas obtained in Step 1, water, and fly ash. After solid - liquid separation, silicon dioxide and an aluminum sulfate solution are obtained; Step 3) crush and ball - mill the overhaul slag, and carry out first - stage roasting with a peroxide at high temperature to obtain clinker 1; leach out sodium fluoride from clinker 1 by water immersion, and then add it to the aluminum sulfate for second - stage roasting to obtain clinker 2; Step 4) mix clinker 2 with water for leaching to obtain a filtrate and a filter residue; Step 5) calcine calcium oxide and the filter residue to obtain calcium aluminate. The beneficial effect of the present invention aims to synergistically utilize the sodium, aluminum, fluorine, and lithium elements, the aluminum and silicon elements of fly ash, and the calcium element in desulfurized gypsum to achieve the purpose of resource conversion.

The present invention relates to the technical field of inorganic multi-color coatings, and specifically relates to a preparation method and apparatus for an inorganic multi-color coating, and a use. The preparation method comprises the following raw materials: base paint: water, cellulose, a defoaming agent, a dispersing agent, a wetting agent, a luminescent material, an inorganic hybrid emulsion, an odorless pH regulator, and a bactericide; granulation liquid: water, a bactericide, xanthan gum, protective colloid powder, an odorless pH regulator, nanocellulose, and a defoaming agent; and a continuous phase emulsion: an inorganic hybrid emulsion, a bactericide, inorganic gel, deionized water, an odorless pH regulator, a thickening agent, and a defoaming agent. In the present invention, a mixture of CaAl2O4 calcium aluminate and BaAlO4 barium aluminate is added to serve as a luminescent material, the luminescent material can absorb and store solar energy by means of a specific mode when exposed to sunlight during the daytime, and at night, the internally stored energy is converted into optical radiation to be released, thereby realizing a light-emitting effect and realizing the luminous function of the coating.