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.

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 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 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 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.