9results about How to "Guaranteed volume stability" patented technology

The invention discloses geopolymer regenerated fireproof mortar based on porous light filler and a preparation method of the geopolymer regenerated fireproof mortar. The fireproof mortar is prepared from the following raw materials: 460 to 520 parts of cementing material, 210 to 360 parts of porous light filler, 330 to 380 parts of alkali activator, 120 to 500 parts of regenerated fine aggregate and 180 to 280 parts of water, the porous light filler is preferably selected from fly ash hollow microspheres. The preparation method comprises the following steps: uniformly mixing the cementing material, the porous light filler and the recycled fine aggregate to obtain a dry mixture; and adding an alkali activator into the dry mixture to obtain the geopolymer regenerated fireproof mortar. And after the age is reached, demolding and curing are carried out. By utilizing the characteristics of high porosity, low heat conductivity coefficient and the like of the porous light filler, the heat preservation and heat insulation capabilities of the geopolymer regenerated mortar are improved, the fireproof performance of the geopolymer mortar is greatly improved, and meanwhile, the resource utilization of solid wastes is realized.

The invention relates to a preparation method of a thermal shock resistant high-alumina brick. The preparation method comprises the following steps: S1, preparing a regulator; S2, mixing aggregate; S3, preparing a mixed grinding material; the thermal shock resistant high-alumina brick preparation equipment comprises a mixing and grinding device, a brick press and a tray, the mixing and grinding device comprises a mixing and grinding cylinder, a rotating stand, a grinding wheel and a scraper blade, a discharge port is formed in the lower portion of the circumferential side face of the mixing and grinding cylinder, a guide plate is arranged on the lower side of the discharge port, and a cover plate is arranged at an opening in the upper end of the mixing and grinding cylinder in a closed mode. And the cover plate is provided with a feeding hole. The invention aims to solve or at least alleviate the problem that a fine pore structure in a high-alumina brick is not easy to control when the thermal shock resistant high-alumina brick is produced, and provides a preparation method and preparation equipment of the thermal shock resistant high-alumina brick.

The present invention relates to a "plum blossom pile" type air-permeable brick for composite ladle and a preparation method thereof, wherein the air-permeable brick comprises a dispersion block, a castable, a cover plate, an air chamber, a steel shell, and a slit, wherein the dispersion blocks are evenly and spacedly arranged from the center to the outer circle, the castable is filled between the dispersion blocks, the slits are evenly distributed in the castable, the steel shell is wrapped at the outermost part of the air-permeable brick, the cover plate is at the bottom of the air-permeable brick, and an air chamber is left between the dispersion block, the castable and the cover plate. The air-permeable brick produced by the present invention has good air flow stability and uniformity, large gas ventilation volume, high-strength brick body, good anti-permeability and thermal vibration stability, and a long service life.

The invention provides refractory concrete and a preparation method thereof, and belongs to the technical field of concrete. The preparation method comprises the following steps: modifying basalt fiber, modifying granite stone powder, grafting and mixing. The step of modifying the granite stone powder comprises the following steps: putting the granite stone powder into an ethanol solution, adding sorbitol laurate and polyoxyethylene sorbitan monolaurate, stirring at the stirring temperature of 46-50 DEG C, uniformly stirring, adding threonine, carrying out ball milling treatment for 26-30 minutes at the ball milling rotating speed of 114-125rpm according to the ball-to-material ratio of (3-5): 1, and after the ball milling is finished, cooling to room temperature to obtain the modified granite stone powder. Filtering and drying to obtain modified granite stone powder; the particle size of the granite stone powder is 135 to 145 nm; the mass concentration of the ethanol solution is 45-50%; the mass ratio of the granite stone powder to the ethanol solution to the sorbitol laurate to the polyoxyethylene sorbitan monolaurate to the threonine is (8.3 to 8.7) to (90 to 97) to (1.0 to 1.2) to (1.1 to 1.5) to (4.5 to 4.9); the prepared refractory concrete is high in strength, excellent in water permeability resistance, good in high-temperature corrosion resistance and low in linear shrinkage rate.

The present invention relates to a concrete suitable for internal pouring of a steel lattice column and a construction method thereof, and belongs to the technical field of building concrete. The concrete suitable for internal pouring of a steel lattice column according to the present invention contains the following components by weight: 300-330 parts of silicate cement, 100-120 parts of fly ash, 730-750 parts of sand, 850-900 parts of gravel, 30-50 parts of modified coal gangue, 12-20 parts of composite admixture, 0.15-0.2 parts of air entraining agent, and 180-200 parts of water. The concrete prepared by the present invention has good fluidity, can be constructed for structures with dense steel bars, narrow space, and complex shapes, and is convenient to construct; the overall structure has a high density, and the volume stability is strong, and the curing shrinkage is reduced.

The invention provides a refractory concrete and a preparation method thereof, belonging to the technical field of concrete; the preparation method comprises modified basalt fiber, modified granite powder, grafting and mixing steps; the step of modifying the granite powder comprises placing the granite powder in an ethanol solution, adding sorbitol dodecanoate and polyoxyethylene sorbitan monolaurate for stirring at a stirring temperature of 46-50 DEG C, adding threonine after stirring evenly, and performing ball milling treatment at a ball milling time of 26-30 min, a ball milling speed of 114-125 rpm, and a ball-to-material ratio of 3- 5:1, after the ball milling is completed, the modified granite powder is obtained by filtering and drying; the particle size of the granite powder is 135-145nm; the mass concentration of the ethanol solution is 45-50%; the mass ratio of the granite powder, ethanol solution, sorbitol dodecanoate, polyoxyethylene sorbitan monolaurate, and threonine is 8.3-8.7:90-97:1.0-1.2:1.1-1.5:4.5-4.9; the refractory concrete prepared by the present invention has high strength, excellent water permeability resistance, good high temperature corrosion resistance, and low linear shrinkage.

The invention discloses a preparation method of a concrete crystal nucleus early strength agent. The preparation method of the concrete crystal nucleus early strength agent comprises the following steps: adding nano calcium silicate into a sodium alginate aqueous solution, carrying out ultrasonic dispersion to form an emulsion, dropwise adding the emulsion into an excessive soluble calcium salt solution through an atomizing nozzle to form a microsphere emulsion, filtering and centrifugally separating the microsphere emulsion to obtain calcium alginate-calcium silicate microspheres, and drying the calcium alginate-calcium silicate microspheres to obtain the concrete crystal nucleus early strength agent. Then pouring the microspheres into dihydrate gypsum micro powder to be fully mixed to form nano calcium silicate-gypsum microspheres, and finally blowing the nano calcium silicate-gypsum microspheres into a high-temperature furnace kiln through an air blower to react to obtain the powder concrete crystal nucleus early strength agent. The preparation method provided by the invention not only realizes resource utilization of industrial solid waste gypsum, but also realizes good dispersity of the calcium silicate crystal nucleus early strength agent in a powder state, avoids agglomeration of the crystal nucleus early strength agent, improves the early strength effect of the crystal nucleus early strength agent, and reduces the adverse effect on the performance of the existing product due to the use of a surfactant.

The application discloses a cement concrete surface layer functional gradient material and a preparation method thereof, and has a composite surface layer structure, comprising a first concrete layer and a second concrete layer; the first concrete layer comprises cement, mineral admixture, synthetic fiber, coarse aggregate, fine aggregate, water and a first water reducing agent; the second concrete layer comprises cement, coarse aggregate, fine aggregate, water and a second water reducing agent; the coarse aggregates of the first concrete layer and the second concrete layer are of the same lithology; the linear expansion coefficient of the first concrete layer is 10*10 ‑6 / °C±0.5*10 ‑6 / °C, the linear expansion coefficient of the second concrete layer is 8*10 ‑6 / °C±0.5*10 ‑6 / °C, and the flexural elastic modulus ratio is 1.05-1.1. Through interlayer material collaborative design, the application remarkably improves the anti-freezing, anti-permeation, wear resistance and interlayer deformation coordination, prolongs the service life of the pavement, and is especially suitable for high requirement engineering such as airport pavement.

This invention discloses a method for preparing a ternary solid waste alkali-activated cementitious material based on particle size control, relating to the fields of building materials and solid waste resource utilization technology. The method includes: obtaining three solid waste raw materials—blast furnace slag, red brick powder, and waste glass powder—and setting differentiated target particle size grinding parameters based on their differences in mineral crystal structure and chemical activity; mechanically grinding the three solid waste raw materials separately and detecting the particle size of the three powders after mechanical grinding; dry-mixing the three powders according to a preset mass ratio to prepare a ternary composite precursor; adding an alkali activator solution to the ternary composite precursor and mixing to activate the hydration reaction of the system; and curing under standard curing conditions to obtain the finished cementitious material. This invention employs the above-mentioned method for preparing a ternary solid waste alkali-activated cementitious material based on particle size control, which has the advantages of being low-carbon and environmentally friendly, and while improving early strength, ensures the volume stability of the material in later stages.