33results about How to "Has fast hardening" patented technology

The invention discloses a fire-retardant coating with photo-catalytic performance and a preparation method thereof, belonging to the field of fire-retardant coatings. The coating comprises a base material, a catalyst, a charring agent, a foaming agent, a filler, a pigment, a solvent, a dispersant, a drier, a drying aid, a nano mother solution and the like, wherein the base material is aluminum dihydrogen phosphate, the catalyst is ammonium polyphosphate, the charring agent is pentaerythritol, the foaming agent is melamine, the filler is ultra-fine slag powder, the pigment is Cu-La/TiO2, the solvent is water, the dispersant is a BYK180 polymeric dispersant, the drier is lead oxide, the drying aid is zinc powder, and the nano mother solution is a nano SiO2 mother solution. The fire-retardant coating disclosed by the invention reduces the environment pollution to the maximum extent by using industrial waste residues as the filler; meanwhile, the coating has a function of realizing photocatalytic degradation of formaldehyde gas under a visible light source to endow conventional fire-retardant coatings with a brand-new function, and the fire-retardant coating accords with the development trend of national green ecological building materials.

The present invention discloses a system and a method for preparing a building 3D printing material by using municipal waste and industrial solid waste. The system comprises a homogenization pool, a wet powder mill, a filter press, a rotary kiln, a powder mill and a hot water storage tank. According to the method, wet sludge produced from an urban sewage treatment plant is directly mixed with mineralized garbage, red mud, desulfuration gypsum, carbide slag and industrial water to form a mixed solution without dewatering, a dry weight ratio of the wet sludge to the mineralized garbage to the red mud to the desulfuration gypsum to the carbide slag in the mixed solution is 5-10:5-10:15-30:10-20:30-60, the solid-liquid ratio in the mixed solution is maintained at 1:3-1:4, the mixed solution is sequentially subjected to wet milling, homogenization treatment and alkali removing, the homogenization treatment temperature is 60-70 DEG C, the homogenized material is subjected to mechanical pressure filtration dehydration, and the filtered material is subjected to high temperature calcination to obtain the building 3D printing material precursor.

The invention relates to a low-alkali high-strength cement comprising the following clinker components (by weight parts), C4A3S 20-30 parts, C2S 20-30 parts, C3S 15-30 parts, CaSO4 5-15 parts, C4AF 5-10 parts, C3A 2-5 parts, the cement may also contain CaCO3 5-10 parts or/and SiO2 t-10 parts as additives.

The invention discloses a cement clinker and belongs to the technical field of cement clinker production. The clinker is prepared from the following raw materials in percentage by mass: 30 to 60 percent of calcareous materials, 0 to 25 percent of siliceous materials, 10 to 40 percent of aluminum materials, 0 to 10 percent of ferrous materials and 5 to 20 percent of gypsum materials; a mineral composition of the clinker is prepared from 10 to 40 percent of C4AS, 25 to 40 percent of C2S and 10 to 30 percent of C4AF. According to the clinker disclosed by the invention, the iron content of the cement clinker is low, and the seawater erosion resisting ability of the clinker is improved; the cement clinker is especially suitable for marine engineering.

The invention discloses a ferronickel slag magnesium phosphate binding material and application thereof. The binding material is prepared from 6-12 parts of ferronickel slag, 12-25 parts of dead burned magnesia, 3-12 parts of phosphate and 1-10 parts of retarder. The ferronickel slag magnesium phosphate binding material is used in structural members requiring high strength in early age period and rush-repair work. The ferronickel slag magnesium phosphate binding material has the advantages of achieving rapid hardening and early strengthening, and being high in strength and small in shrinkage deformation, the interior structure is more compact, the porosity is low, and the durability including water tolerance is improved. Moreover, according to the ferronickel slag magnesium phosphate binding material, innocent treatment of the ferronickel slag is achieved, high-efficiency resource utilization of industrial waste residues is promoted, and on the premise that the mechanical properties of the binding material is guaranteed, the consumption of dead burned magnesia is reduced, the consumption of a non-renewable resource, namely magnesite, and energy loss are reduced, the production cost of the magnesium phosphate binding material is decreased, and therefore, economic benefits and environmental benefits are remarkable.

The invention discloses a magnesium phosphate cement-base porous material and a preparation method thereof. The preparation method is characterized by comprising the following steps: taking the following raw materials in parts by mass: 5-40 parts of dead burnt magnesite, 10-35 parts of ammonium dihydrogen phosphate, 2-15 parts of borax, 10-60 parts of fly ash, 10-60 parts of quartz sand, 0.3-1 part of metallic zinc or iron powder and 5-20 parts of water; uniformly mixing the dead burnt magnesite, ammonium dihydrogen phosphate, borax, fly ash, quartz sand and metallic zinc or iron powder to obtain a powder mixture; adding the powder mixture into a container with a stirring device, adding water while starting time keeping, stirring slowly for 15-30 seconds, stirring quickly for 1.5-3 minutes, stopping stirring for 15 seconds, and stirring quickly for 3-5 minutes to obtain a slurry; and forming the slurry, and curing to obtain the magnesium phosphate cement-base porous material. The porous material disclosed by the invention has the advantages of early strength, quick hardening, favorable acid/alkali attack resistance, favorable thermal-insulation property, low carbon and environment friendliness, and is mainly used as a thermal-insulation material.

The invention belongs to the resource recycling industry, and relates to comprehensive utilization of solid wastes, in particular to a solid-waste-based high-iron sulphoaluminate maritime work cementing material as well as a preparation method and application thereof. The high-iron sulphoaluminate cement is prepared from the following raw materials in parts by mass: 70 to 80 parts of solid waste-based high-iron sulphoaluminate cement clinker, 5 to 10 parts of desulfurized gypsum, 5 to 10 parts of limestone tailings, 10 to 20 parts of steel slag, 0.15 to 0.2 part of water reducing agent, 0.05 to 0.1 part of retarder and 2 to 4 parts of silica fume. The concrete has the characteristics of quick hardening, early strength, high strength, high compactness, high permeability resistance and the like, is particularly resistant to seawater erosion, has excellent seawater erosion resistance and carbonization resistance, and can effectively prolong the durability of marine concrete engineering.

The invention relates to the construction field, and in particular relates to a high corrosion-resistant marine cement cementing material and a preparation method thereof, and the high corrosion-resistant marine cement cementing material comprises 20-25 parts of wollastonite; 80-100 parts of sulphoaluminate cement; 30-50 parts of nano-like hydrotalcite; 20-30 parts of fiber; 80-100 parts of coralreef sand; 50-60 parts of polyacrylamide; 20-30 parts of modified acrylic emulsion and 10-15 parts of additives; the invention aims to overcome the defects of the prior art and provide the high corrosion-resistant marine cement cementing material and the preparation method thereof. The high corrosion-resistant marine cement cementing material has the characteristics of good mechanical strength, durability and corrosion resistance, improved bending strength, improved cement density, better flocculation property, capability of reducing friction resistance between liquids, excellent impermeability, quick hardening, early strength, high later strength and the like.

The invention relates to a high-toughness epoxy composite grouting material capable of being constructed at low temperature and a preparation method thereof. The epoxy composite grouting material comprises a component A, a component B and a component C, the component A comprises an epoxy emulsion, a styrene-butadiene emulsion and a defoaming agent; the component B comprises a curing agent, a cosolvent and water; and the component C comprises modified cement powder, a coagulant, a retarder, a powder water reducer, alkali-resistant glass flakes and quartz sand. The three components are uniformly mixed and stirred according to a certain proportion and sequence for use. The defects that an existing epoxy mortar grouting material is poor in low-temperature constructability and a common cement-based grouting material is low in early strength are overcome, a waterborne epoxy rapid curing system is combined with a special cementing material, the grouting material has the advantages of being good in groutability and rapid in hardening and early strength under the low-temperature condition, and the grouting material is safe and environmentally friendly. Meanwhile, after being hardened, the material is high in toughness and good in impact resistance and corrosion resistance, and can be widely applied to the fields of building repair and reinforcement, duct grouting, secondary grouting and the like.

The invention relates to high-impermeability cement-based repair mortar with a crack self-sealing function and a preparation method, and is suitable for the technical field of building materials. The repair mortar is prepared from the following components in parts by mass: 100 parts of sulphoaluminate cement, 150 to 300 parts of quartz sand, 5 to 16 parts of super absorbent resin SAP, 2 to 9 parts of waterborne epoxy resin emulsion, 1.4 to 6.4 parts of curing agent, 0.5 to 1 part of water reducing agent, 0.1 to 0.3 part of defoaming agent and 20 to 35 parts of water. The super absorbent resin needs to be pretreated by adopting a high-concentration calcium salt solution before being used. The cement-based repairing mortar provided by the invention not only has a good bonding effect with matrix concrete, but also has a crack self-sealing function when underground water permeates, so that a good anti-permeability effect is achieved, and the repairing efficiency of underground engineering concrete under high-water-content geology can be effectively improved.

The invention belongs to the technical field of building waste recycling, particularly relates to a method for recycling magnesium oxysulfate building material waste based on magnesite tailings, and further discloses a product prepared from the waste. According to the method for recycling the magnesium oxysulfate building material waste based on the magnesite tailings, magnesium oxysulfate building materials are heated and activated by a flue, performances of gel materials of the magnesite tailings are assisted, the compressive strength of a prepared building material product reaches 42.5MPa or more, a softening coefficient reaches up to 0.9 or more, and the product has the advantages of high strength and good water resistance, rapidness in hardening, easiness in strength and the like andcan be used for repairing materials. The product is uniform in quality, stable in performance and long in service life, main materials of the product include more than 95% of the waste, the recyclingrate of the magnesium oxysulfate building material waste can reach 90%, the method is economical and environmentally friendly, energy is saved, emission is reduced, the magnesium oxysulfate building material waste is recycled, waste accumulation of low-grade magnesite tailings is treated, magnesium sulfate produced by waste acid is used and the like.

The invention discloses a plastering gypsum formula, which comprises the following materials in weight percent: desulfurized gypsum and calcium carbonate (with a ratio of 8:2), 5 percent of fine sand screened out by a 0.8mm mesh screen, 1.8 thousandths of hydroxypropyl methylcellulose, 1 thousandth of polyvinyl alcohol, 1 thousandth of lignocellulose, 3 thousandths of gypsum retarder, 0.15 thousandths of guar gum and 2 thousandths of slaked lime, all of which are mixed uniformly. The plastering gypsum produced by the formula is convenient and fast in construction, gelates automatically, has a unique self-breathing function, is colorless, odorless, non-radioactive and noise-absorbing, does not shrink and crack, can meet the function requirements of building partitions, is economical and practical, is an ideal choice for high-rise and middle and low rise building walls and decoration and fitment, and has the advantages of high strength, rapid hardening, fire protection, earthquake resistance, heat resistance, heat insulation, sound insulation, high cementation, no empty drum, construction success in one time, convenient operation and the like; not only project quality is improved but also project period is shortened, and better comprehensive benefits are obtained.

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 relates to the technical field of water permeable bricks, in particular to an all-solid-waste water permeable brick and a preparation method and application thereof. The water permeable brick comprises a bottom layer and a surface layer, wherein the bottom layer comprises the following raw materials in parts by mass: 15-22 parts of a solid waste-based sulphoaluminate cementing material, 70-80 parts of steel slag, a water-cementitious material ratio of 0.33, and 3-4.4 parts of a water reducing agent; and the surface layer is prepared from the following raw materials in parts by mass: 15-22 parts of a solid waste-based sulphoaluminate cementing material, 8-10 parts of iron tailing sand, a water-cementitious material ratio of 0.33 and 3-4.4 parts of a water reducing agent. The solid waste-based sulphoaluminate cementing material and the steel slag are compounded, so that the compressive strength of the water permeable brick is improved, and the water permeability of the water permeable brick can be ensured to be good. The wear resistance and the freezing resistance of the water-permeable brick reach the standards of the water-permeable brick, iron tailing sand is selected as aggregate in the surface layer, and the iron tailing sand is compounded with a solid waste-based sulphoaluminate cementing material, so that the water permeability is improved, water can more easily penetrate through the surface layer to reach the bottom layer of the water-permeable brick, and the penetrated water can more easily penetrate through the base layer. All solid waste raw materials are adopted, the process is simple, and cost is low.

The invention discloses a fireproof coating for tunnels. The fireproof coating comprises the following raw materials in parts by weight: 5-70g of high-alumina cement, 5-70g of ordinary Portland cement, 1-10g of redispersible rubber powder, 9-32g of expanded perlite, 7-33g of expanded vermiculite, 5-15g of hollow beads, 15-35g of light calcium carbonate, 2-12g of bentonite, 2-9g of sepiolite, 1-10gof aluminum silicate fibers, 4-25g of a flame retardant smoke inhibitor, 2-15g of aluminum hydroxide, 3-10g of magnesium hydroxide and 2-10g of sodium tetraborate. According to the invention, throughnon-inflammability and low thermal conductivity of the material and heat absorption performance of the material in a coating layer, the heat rising speed of steel bars is delayed, fire resistance isimproved, the fire resistance limit is enhanced, and bonding strength between the coating and inner walls of the tunnels is enhanced. Fire prevention treatment is effectively carried out in the tunnel, loss caused by external fire is reduced, and repair cost is reduced.

The invention relates to the technical field of building materials and provides a grouting material for a sound barrier backboard. The grouting material comprises the following raw materials (by weight): 15-25 parts of Portland cement, 30-40 parts of fly ash, 50-70 parts of building rubbish, 10-15 parts of water and 0.61-1.08 parts of additives. The grouting material has advantages of wide sourcesof raw materials, high utilization rate of solid wastes, low cost, rapid hardening, early strength, slight expansion, strong bonding force, good heat stability and the like, and can be used as a binder for bonding or reinforcement of engineering equipment. The sound barrier backboard is provided with multiple reinforcing holes. after the backboard is maintained to design strength, the backboard is tensioned with pre-stress steel bars or steel strands, and then the grouting material is injected to glue the pre-stress steel bars or steel strands with the sound barrier backboard as a whole. Thus, the sound barrier backboard is safe and stable and durable.

The invention discloses a steel pipe gypsum mortar and waste concrete combined column. The steel pipe gypsum mortar and waste concrete combined column is characterized by comprising a steel pipe, and gypsum mortar and a waste concrete block which are filled into the steel pipe, wherein the two ends of the steel pipe are sealed by end plates; a plurality of tamping holes are arrayed on a side wall of the steel pipe; a plurality of longitudinal steel bars are uniformly distributed in the circumference of the inner wall of the steel pipe. The invention further discloses a method for preparing the steel pipe gypsum mortar and waste concrete combined column. The steel pipe gypsum mortar and waste concrete combined column prepared by the invention has the characteristics of rapid hardening and early strengthening, and can rapidly reach a bearing capability; the strength of a member is mainly provided by a waste concrete block framework, so that the material cost can be reduced; furthermore, the gypsum mortar is only used as a cementing material and a joint filling material, and the outer part is restrained by the steel pipe, so that the determination of a weak interface between the gypsum mortar and the waste concrete block can be weakened, and the strength and ductility of the member are greatly improved.

The invention discloses an interface joint material based on industrial solid waste and a preparation method thereof, and relates to the field of interface joint materials for buildings. The concrete comprises the following raw materials in parts by weight: 80-130 parts of Portland slag cement, 80-130 parts of metakaolin, 80-130 parts of industrial solid waste, 25-35 parts of sodium silicate, 8-12 parts of alkali, 30-36 parts of acrylate, 1-3 parts of a trivinyl ether compound, 1-3 parts of inorganic sulfite, 1-3 parts of persulfate, 3-6 parts of a water reducing agent and 60-80 parts of water. The interface joint material based on the industrial solid waste is suitable for concrete interfaces with different components, is good in cohesiveness and high in strength, and has the advantages of being capable of being pumped, rapid in hardening, early in strength, micro in expansion and high in ductility. According to the invention, the industrial solid waste is doped, so that the utilization rate of the industrial solid waste in the joint material for the building is increased, and the joint material has important significance on recycling of the industrial solid waste.