48results about How to "Fast setting and hardening" patented technology

The invention discloses general purpose Portland cement based ultra-light physical foamed concrete which is characterized by being prepared by mixing, forming and maintaining the following components in percentage by weight: 20-70% of general purpose Portland cement, 0-40% of a type A admixture or/and 0-40% of a type B admixture, 0.5-4% of a type C additive, 0.3-2% of a foaming agent, 0-1% of a water reducing agent, 0-4% of fibers and 25-60% of water. The general purpose Portland cement based ultra-light physical foamed concrete disclosed by the invention has the characteristics of ultra-low dry density, low thermal conductivity, relatively high strength, wide raw material source, low cost, simple preparation process, easy maintenance process selection and the like, is suitable to serve as an earthquake-proof and energy-absorbing material, a lightweight cushion course and a catalyst carrier material in a thermal insulation project, a floor heating project and a back filling project, and is particularly suitable for a building exterior wall external thermal insulation system, a roof thermal insulation system, a composite thermal insulation wall body and a buffer energy absorbing system.

The invention discloses super-light foam concrete. The super-light foam concrete is characterized by comprising the following materials in parts by mass: 60-80 parts of ordinary Portland cement, 10-20 parts of rapid hardening sulphoaluminate cement, 2-5 parts of silica fume, 8-15 parts of ultra-fine fly ash, 0.5-1.0 part of a polycarboxylate superplasticizer, 1-2 parts of redispersible powder, 0.05-0.2 part of hydroxypropyl methyl cellulose ether, 0.1-0.4 part of polypropylene fibers, 0.02-0.05 part of a superfine MnO2 catalyst, 4-6 parts of hydrogen peroxide and 50-60 parts of water, wherein a sustained-release gelatin capsule is filled with the superfine MnO2 catalyst and has the collapse time limit of 5-10 min. The invention also discloses a preparation method of the super-light foam concrete. The preparation method is characterized by comprising the steps of weighing, mixing, stirring and pouring. The super-light foam concrete has the advantages of high percentage of close area, low water absorption, high compressive strength and low heat conduction coefficient. The preparation method of the super-light concrete has the advantages that the hydrogen peroxide decomposition efficiency can be improved, and the hydrogen peroxide decomposition speed can be effectively controlled.

This invention relates to a method for preparing fireproof and heat-insulating board for architectures. The fireproof and heat-insulating board comprises aggregate and gel material at a weight ratio of (100-150):(100-250). The gel material comprises: light-burned MgO 46-56 wt.%, industrial MgCl2 20-26 wt.%, H2O2 1.5-3.5 wt.%, H3PO4 0.2-0.3 wt.%, HBO3 0.2-0.3 wt.%, and water 20-26 wt.%. The method comprises: (1) screening foam glass (particle sizes are 15-35 mm, and density is 160-180 kg/m3), and placing in a mold; (2) adding industrial MgCl2 and water; (3) adding H3PO4 and HBO3, and stirring uniformly; (4) adding light-burned MgO, stirring uniformly, and adding H2O2 during stirring to obtain a gel material; (5) pouring the gel material into a mold; (6) covering the lid, and curing naturally; (7) demolding, and maintaining. The fireproof and heat-insulating board has such advantages as low weight, high strength, high impact resistance, no deformation, good heat, sound, fire and water resistance, and good processability.

The invention provides self-leveling type II polymer cement waterproof mortar. The mortar comprises Portland cement, a composite hardening accelerator, aggregates, water, polymer and other additives, wherein the composite hardening accelerator comprises the following raw materials in parts by weight: 3 to 6 parts of calcium lime, 2 to 5 parts of sodium sulphate, and 5 to 10 parts of aluminate cement. The mortar solves the durability problem of poor long-term waterproof anti-penetrability performance of common self-leveling motor due to high aluminum cement component content, realizes the self-leveling construction of polymer cement waterproof mortar, and can be applied to various waterproof construction projects, such as toilets, kitchens, roofs, swimming pools and subsurface structures.

The invention discloses a sulphur oxide cement product and a preparation method thereof. The sulphur oxide cement product is prepared from, by weight, 50-100 parts of activated magnesium oxide powder, 30-100 parts of magnesium sulfate heptahydrate, 0.05-2 parts of an additive and a basic magnesium sulfate saturated suspension. The obtained sulphur oxide cement product is high in early strength and good in early anti-cracking capability.

The invention discloses a seepage and corrosion resistant casting material. The casting material comprises an A composition, a B composition and a C composition, wherein the weight percentage of various compositions is calculated by the 100 total weight percentage of the casting material; the A composition is a uniform mixture of the following compositions: 13 to 18 percent of 5-7 mm fused zircon corundum, 12 to 20 percent of 3-5 mm fused zircon corundum, 19 to 27 percent of 1-3 mm fused zircon corundum and 12 to 18 percent of 0-1 mm fused zircon corundum; the B composition is a uniform mixture of the following compositions: 3 to 5 percent of activated alumina micro powder, 2 to 4 percent of low-iron silica fume, 3 to 7 percent of desilicate zirconium, 2 to 10 percent of zircon powder and 2 to 10 percent of white alundum powder; and the C composition is a uniform mixture of the following compositions: 1 to 3 percent of alumina cement and 0.05 to 0.15 percent of sodium tripolyphosphate. The seepage and corrosion resistant casting material has the advantage of strong capacity of resisting corrosion of glass chemistry and the like.

The invention discloses a quick-setting early-strength grouting material, and belongs to the technical field of grouting materials. The quick-setting early-strength grouting material comprises the following raw materials in percentage by mass: 75 to 90 parts of potland clinker, 3 to 10 parts of mineral slag, 5 to 15 parts of sulphate aluminium cement, 1 to 5 parts of silica fume, 0.5 to 4 parts of bentonite, 0.05 to 0.2 part of hydroxyethyl cellulose, 0.25 to 0.5 part of water reducing agent, 0.005 to 0.1 part of lithium carbonate, and 0.05 to 0.5 part of defoaming agent. The grouting material disclosed by the invention is mainly applied to grouting leakage plugging of a rock-soil layer, and in particular to the grouting leakage plugging engineering of water burst at the positions of a dam foundation and the like, and has the advantages of short setting time, high early strength, high construction performance, and good plugging performance.

The invention discloses a crystal seed used for improving concrete early stage strength, and an application thereof. The crystal seed is characterized in that: the crystal seed is prepared from grinded cement stones, wherein the specific surface area of the crushed and grinded crystal seed is 8000 to 15000m<2>/kg. The cement stones are obtained through steps that: a certain amount of inorganic salt is doped into common portland cement, and the mixture is cured for a certain age, such that the cement stones are obtained. The application of the crystal seed comprises steps that: the crystal seed is added to concrete, wherein an adoption amount takes 0.8 to 3% of the mass of the concrete. The crystal seed is an additive with advantages of cheap price, good quality, and environment friendliness. When the crystal seed is added to concrete, early stage strength of concrete is improved, and later stage strength of concrete is ensured. Therefore, durability of concrete is improved.

The invention discloses crack-resistant early strength concrete and a preparation method of the crack-resistant early strength concrete. The concrete is prepared from the following raw materials in parts by weight: 460 to 475 parts of cement, 60 to 65 parts of a mineral powder, 512 to 527 parts of sand, 1252 to 1288 parts of gravel, 5 to 10 parts of a cellulose-silica composite nanomaterial, 2 to5 parts of calcium sulfate whiskers, 4.1 to 4.9 parts of an early-strength polycarboxylic acid water reducer and 175 to 180 parts of water. The concrete prepared by the invention not only has fast coagulation hardening speed, high early strength and good early strength, but also has high compressive strength at the later stage, and is not easy to crack and produce cracks, and has excellent workingperformances and durability.

The invention provides an eco-friendly pavior brick and a preparation method thereof, and relates to the technical field of pavior brick production. The pavior brick comprises a surface layer and a base layer, wherein the surface layer is prepared from, by weight, 15-27 parts of cement, 15-30 parts of grit, 5-7 parts of macadam, 30-40 parts of industrial waste cinder granules, 12-16 parts of waste ceramic particles, 3-6 parts of silica fume, 5-10 parts of coal ash, 3-10 parts of lime, 2-4 parts of air-entraining agents, 1.5-2.5 parts of waterproof agents, 0.3-0.5 part of antifreezing agents, 0.4-0.6 part of water reducing agent, 0.3-0.5 part of pigment powder and 1-3 parts of water; the base layer is prepared from, by weight, 16-18 parts of cement, 18-22 parts of grit, 17-25 parts of macadam and 2-3 parts of water; the preparation method includes the steps of (1) the preparation of surface layer ingredients, (2) preparation of base layer dosing, (3) molding, demoulding, stacking and maintaining; the eco-friendly pavior brick and the preparation method thereof solve the problems of unavailable recycling of wastes, poor heat insulation property, low water permeability and freezing resistance, a bad effect of reducing water and low compressive strength in the prior art.

The invention discloses a concrete early strength agent, an early strength type concrete and a preparation method of the early strength concrete. The concrete early strength agent is prepared from, by mass, 70-80% of a component A and 20-30% of a component B, the component A is a liquid mixture and comprises, by weight, 10-24 parts of silica sol dispersion liquid, 10-15 parts of siloxane emulsion, 2-4 parts of a surfactant, 8-15 parts of soluble calcium salt and 4-5 parts of alcamines; the silica sol dispersion liquid is a dispersion liquid of three substances, namely nanoscale silicon dioxide, a dispersing agent and a suspending agent, in water, and the dispersing agent accounts for 0.5-2% of the solvent water; the suspending agent accounts for 0.5-1% of the solvent water, and the nanoscale silicon dioxide accounts for 55-70% of the solvent water; and the component B is a solid mixture and comprises,s by weight, 30-40 parts of meta-aluminate, 20-30 parts of silicate, 20-30 parts of lithium salt, 2-10 parts of calcium tartrate and 0.5-1 part of methyl cellulose ether. The superposition effect of different early strength components can be exerted, the setting and hardening speed of cement is accelerated, the precipitation of hydration products is promoted, and the early strength of concrete can be obviously improved in a low-temperature environment.

The invention discloses a high-strength cement-based self-leveling mortar prepared by desulfurization calcium plaster, and belongs to the technical field of self-leveling mortar. The high-strength cement-based self-leveling mortar prepared by desulfurization calcium plasteris prepared from the following raw materials in parts by weight: 18 to 28 parts of desulfurized calcium plaster, 30 to 37 parts of aluminate cement, 5 to 6 parts of Portland cement, 35 to 39 parts of natural siliceous sand, 0.7 to 0.8 part of water reducing agent, and 0.01 part of thickener. The invention further discloses apreparation method of thehigh-strength cement-based self-leveling mortar prepared by the desulfurization calcium plaster. According to the high-strength cement-based self-leveling mortar prepared bythe desulfurization calcium plaster and the preparation method thereof, the performance characteristics of the desulfurized calcium plaster, high-alumina cement, and the ordinary Portland cement are fully utilized respectively, the prepared cement-based self-leveling mortar has the characteristics that the setting and hardening speeds are fast, fracture resistance and crush resistanceof early andlater periods are high, wear resistance is good,the surface is not prone to being pulverized, and impact performance is good; the plasterin the desulfurized calcium plaster is not subjected to treating processes such as pressure filtration and drying, so that the dispersion effect of the desulfurized plasterin cement slurry is better, the production cost is lowered, new approaches are provided forpreparation of cement-based self-leveling mortar and resource utilization of desulfurizedcalcium plaster,and economic and environmental benefits are good.

The invention belongs to the technical field of mining, and particularly relates to aluminate cement-based jet mortar and a preparation method thereof. The jet mortar is composed of a binding material, a composite additive, sand and water according to the weight ratio of 1: (0.03-0.06): (1.5-3.0): (0.40-0.50). The cementing material is prepared from the following raw materials in parts by weight: 20-40 parts of aluminate cement, 20-40 parts of Portland cement, 10-30 parts of slag powder and 10-30 parts of gypsum; the composite admixture is prepared from the following raw materials in parts by weight: 20-40 parts of a water reducing agent, 10-30 parts of slaked lime, 10-30 parts of sodium carbonate, 10-30 parts of anhydrous sodium sulphate and 5-10 parts of redispersible latex powder. The jet mortar has the characteristics of high setting and hardening speed, high early strength, micro-expansion and the like, and is suitable for engineering application.

The invention relates to the technical field of coal mine roadway material spraying. The invention particularly discloses a high-strength and corrosion-resistant wet spraying material for a coal mineroadway and a construction process thereof. The wet spraying material comprises a solid raw material and water; the ratio of the water to the solid raw material is 0.09-0.11; the solid raw material comprises 15%-30% of cement, 20%-40% of sand, 20%-30% of pebbles, 5%-10% of coal ash, 10%-15% of mineral powder, 5%-10% of silica fume, 0.5-1.5 kg/m < 3 > of hybrid fibers and 2%-20% of a cement additive. The hybrid fibers are two or more of steel fibers, glass fibers, carbon fibers or polypropylene fibers, and the lengths of different fibers are different. The spraying material obtained according to the proportion in the patent can still keep better strength when being used in an acidic corrosive environment of a coal mine roadway, and can meet the requirements of high stress, large deformationof soft rock, rock burst and high-corrosivity coal mine roadway support.

The invention discloses exposed reinforced concrete repairing mortar and a use method thereof. The exposed reinforced concrete repairing mortar is prepared from the following raw materials: magnesium oxide, ammonium dihydrogen phosphate, fly ash, gypsum, sand, water, sodium tripolyphosphate, borax and an auxiliary agent. The concrete is prepared from the following raw materials in parts by weight: 25-30 parts of magnesium oxide, 8-13 parts of ammonium dihydrogen phosphate, 7-14 parts of fly ash, 2-3 parts of gypsum, 20-25 parts of sand, 4-7 parts of water, 2-4 parts of sodium tripolyphosphate, 1-2 parts of borax and 1-4 parts of the auxiliary agent. According to the invention, 25-30 parts of magnesium oxide, 8-13 parts of ammonium dihydrogen phosphate, 7-14 parts of fly ash, 2-3 parts of gypsum, 20-25 parts of sand, 4-7 parts of water, 2-4 parts of sodium tripolyphosphate, 1-2 parts of borax and 1-4 parts of the auxiliary agent are matched, and the raw materials of the concrete repairing mortar are selected and improved, so that the fusion degree of the raw materials reaches the best. The self characteristics and the overall reaction effect of all the raw materials are fully exerted, and the setting and hardening speed of the concrete repairing mortar is increased through flow matching of the first step, the second step, the third step, the fourth step and the fifth step.

The invention relates to a cracking-resistant cement mortar for building plastering, which belongs to building materials, which is prepared from perlite, cement and 801 glue with a volume ratio of (7.5-9):(2.8-3.3):1. The cement mortar solves the cracking, bubbling and poor bonding property problems of the prior plastering material; and has the advantages of high coagulation and setting speed, and good fire resistant, acid and alkali-resistant, thermal insulation and sound absorption properties.

The invention provides a pulse type grouting machine and a double-liquid grouting construction method. The quincuncial pile type is adopted to arrange grouting holes; grouting is carried out on one point of a central area; grouting is dense without a dead angle, the grouting effect is excellent, the grouting pressure is low, and the grouting efficiency is high; and a cabin is unlikely to be blocked on the condition that the condensation rate of mixed slurry is higher. High and low pressure peak load shifting grouting of the pulse type grouting machine is used to realize premixing; secondary mixing in a mixing pipe and third-time in-depth mixing of a vibrator are realized; the grouting speed is controllable; and on the condition that the slurry is excellent in underwater dispersity resistance and high in cohesiveness, the mixing efficiency and the uniform degree are improved. A A-component single fluid and a B-component signal fluid are designed; the single fluid components can work fora long time; when the double fluid is mixed, the underwater dispersity resistance is high, the condensation and hardening rate is high, and the underwater rapid repairing demand of a railway tunnel foundation disengaging area is met; double-liquid grouting does not affect construction due to pipe blocking caused by excessively high condensation rate. The proportion of the component A and the component B can be controlled to adjust the working time of the mixed slurry.

The invention provides a magnesium oxychloride cement-based material, a sand prevention and stabilization plate and preparation methods of the magnesium oxychloride cement-based material and sand-preventing and sand-fixing plate. The magnesium oxychloride cement-based material comprises magnesium chloride, fine sand, bischofite, a water reducing agent, a thickening water-retaining agent, a thixotropic agent, a defoaming agent and fibers. The magnesium oxychloride cement-based material provided by the invention has the characteristics that the fluidity is adaptive to extrusion type printing, the early strength of the material is high in the printing process, and the bonding force between printing layers is good, can be used for 3D printing of sand prevention and stabilization plate construction operation at the room temperature of 15-45 DEG C, and can achieve the purposes of waste utilization and ecological environment improvement.