31results about How to "Long construction time" patented technology

The invention discloses a novel high-strength polyurethane waterproofing paint which consists of a component A and a component B. The component A is prepared from the following components in parts by weight: 140-350 parts of polyether polyol, 20-60 parts of TDI (toluene diisocyanate), 20-60 parts of diphenylmethane diisocyanate and 50-100 parts of a plasticizer; the component B is prepared from the following components in parts by weight: 50-100 parts of polyether polyol, 40-200 parts of a plasticizer, 20-80 parts of a chain extender, 100-300 parts of pigment and filler, 0.1-0.5 part of a catalyst, 0.1-0.5 part of a polymerization inhibitor and 0.1-1 part of a high-performance accessory ingredient defoaming agent. The invention also comprises a preparation method of the high-strength polyurethane waterproofing paint. The high-strength polyurethane waterproofing paint disclosed by the invention has relatively long operable construction time and excellent physical and mechanical properties such as high strength, high elongation rate and high bonding strength, and is low in residual TDI and toxicity. The novel high-strength polyurethane waterproofing paint can be widely applied to infrastructure construction and municipal traffic engineering, and particularly to water resistance of important projects such as high-speed railways and highway bridges.

The invention discloses one-component salt fog resistant water paint and a preparation method thereof. The water paint includes the following raw materials in parts by weight: 20-46 parts of EPMC, 5-18 parts of special EPMC, 20-40 parts of anti-rust pigment, 13-30 parts of deionized water, 2-10 parts of an environment-friendly additive. The product is excellent in performance: the hardness is greater than or equal to H, the adhesive force is of 0-1 level, and the salt fog resistant duration is longer than 800 hours; the paint is environment-friendly and wide in application range.

The invention discloses a high-property water permeation concrete cementing agent. The high-property water permeation concrete cementing agent is prepared from the following raw materials in percentage by mass: 68 to 72% of activated silicon dioxide powder, 18 to 22% of interface modifier, 7 to 10% of water reducing agent, 2 to 4% of thickening time control agent, and 0 to 2% of thickener. The high-property water permeation concrete cementing agent has the advantages that by blending the cementing agent into water permeation concrete, the construction operation time can be obviously prolonged; the compressive and break strengths are improved, and the water permeation coefficient is increased.

The invention discloses a mineral-powder-based admixture for dry-mixed plaster mortar, which comprises the following components in percentage by weight: 60 to 70 percent of mineral slag micro powder, 3 to 6 percent of desulfurized gypsum, 5 to 10 percent of heavy calcium carbonate powder, 1.5 to 2.5 percent of cellulose ether, 5 to 10 percent of redispersible polymer powder (ethylene-vinyl acetate EVA) and the balance of fly ash. The mineral-powder-based admixture for the dry-mixed plaster mortar has the density of more than or equal to 2.5kg/m<3>, the specific surface area of more than or equal to 350m<2>/kg, and the water content of less than or equal to 1.0 percent. The dry-mixed plaster mortar can be prepared by mixing the mineral-powder-based admixture, cement and medium sand in a certain ratio uniformly. The mineral-powder-based admixture has high construction property, high physical and mechanical properties, long construction operable time, a good construction effect and high construction efficiency, and can be used for preparing the plaster mortar of a building wall external thermal insulation system and a building wall internal thermal insulation system.

The invention discloses a preparation method for cement-based crack grouting material for road bridges, and relates to the technical field of concrete crack-grouting materials of bridges. The preparation method comprises the following steps: first weighing the following raw materials: composite cement, composite emulsion, pearlite sand, halloysite clay, sepiolite velvet, epichlorohydrin grafted copolymerized modified bone glue, fibrous xonotlite, a composite water repellent, a composite coupling agent and a composite latex powder; conducting graded chopping on the sepiolite velvet; conductingpulverization and activation on the halloysite clay and the xonotlite; and mixing the materials. The crack grouting slurry material of the invention has excellent slurry performance, bonding performance, process performance and resistance to construction negative temperature, has strong environmental adaptability and high stress resistance, and has broad application prospects.

A water-based liquid reinforcing material for high-performance water-permeable concrete is disclosed. Raw materials of the water-based liquid reinforcing material include, by weight, 5-20 parts of powder reinforcing polymer, 35-50 parts of nanometer silica fume, 10-20 parts of a water reducing agent, 3-5 parts of a viscosity adjusting agent, 0.2-2 parts of a defoamer, 0.1-2 parts of a retarder, 0.5-1 part of a rheological agent and 10-15 parts of an early strength agent. A preparation method of the water-based liquid reinforcing material is also disclosed.

The invention belongs to the technical field of ultra-high performance concrete, and particularly relates to low-temperature ultra-high performance concrete as well as a preparation method and application thereof. The low-temperature ultra-high performance concrete provided by the invention comprises a concrete matrix raw material and water; the concrete matrix raw material comprises, in parts by mass, 100 parts of a cementing material, 100 to 120 parts of aggregate, 20 to 30 parts of a mineral admixture, 0.4 to 0.6 part of a water reducing agent, 0.08 to 0.12 part of a de-foaming agent, 0.1 to 0.3 part of an early strength agent, 0.15 to 0.25 part of a set retarder, 0.1 to 0.5 part of an anti-freezing agent and 13 to 20 parts of steel fibers. The mass ratio of the water to the concrete matrix raw material is (0.08-0.115):1. Various preparation raw materials are compounded to synergistically improve the low-temperature performance of the low-temperature ultra-high-performance concrete, so that the low-temperature ultra-high-performance concrete has good fluidity, compressive strength, durability and construction quality.

The invention relates to a special interior wall painting mortar using gypsum. The mortar comprises cement, fly ash, nickel powder, gypsum, mineral slag micropowder, redispersible rubber powder and additives, wherein the additives comprise a water retaining agent, an air entraining agent, a water reducing agent and polyvinyl alcohol. The special interior wall painting mortar provided by the invention has the advantages of excellent construction performance, good physical and mechanical properties, long construction operation time, good construction effect and high construction efficiency, is simple in construction process, free of hollowing and cracking after being used and applicable to brushing leveling of all interior walls, and has good heat-preserving performance, bonding force and workability.

The invention discloses calcination-free functional desulphurization gypsum putty powder for interior and exterior walls, which comprises the following components in percentage by weight: 65 to 80 percent of desulphurization gypsum, 5 percent of other aggregate, 10 to 25 percent of excitation material, 4 to 7 percent of functional material and 2.8 to 3.3 percent of admixture, wherein the functional material may be one or the mixture of two of SI90-0 type mineral powder releasing elements which a human body needs, far-infrared ray releasing fibrous rock flour and crystal-equivalent rock flour with the fineness of 2,000 meshes; the excitation material comprises steel slag, calcination alums and sodium silicates; and the admixture comprises dispersible polymer powder, methyl hydroxyethyl cellulose and a 3060 type seaweed additive. The invention also discloses a preparation method for the calcination-free functional desulphurization gypsum putty powder for the interior and exterior walls. The calcination-free functional desulphurization gypsum putty powder for the interior and exterior walls has the advantages of releasing far-infrared rays, keeping healthy the human body, invigorating the health of the human body, decomposing a plurality of toxic gases and eliminating unusual smell, along with a good waterproof effect, the effect of adjusting the ionic equilibrium of the human body, a plurality of trace elements beneficial to the human body, and the like.

The invention discloses a method for preparing inorganic coarse aggregate by a gypsum calcination-free technology. The inorganic coarse aggregate is prepared by uniformly mixing industrial side product gypsum, steel slag, mineral vanadium and metakaolin, carrying out ball milling to obtain granules with fineness of over 200 meshes, and packaging. The product prepared by the method has high strength, water resistance, and gelling property. The method has the advantages of being capable of consuming massive desulfurization gypsum, reducing secondary energy loss and secondary CO2 pollution and achieving low-carbon technology and low-carbon economy.

The invention belongs to the technical field of road and bridge materials, and relates to an epoxy asphalt additive for road and bridge pavement as well as a preparation method and a use method thereof. The technical key points are as follows: the water-damage-resistant asphalt mixture comprises the following components in parts by weight: 40-60 parts of solid epoxy resin, 5-20 parts of a water-damage-resistant improver, 5-10 parts of an ultra-high molecular weight epoxy flexibilizer, 30-45 parts of a latent polyester curing agent, 50-100 parts of hard asphalt particles, 0.1-0.5 part of a curing accelerator, 0.3-1 part of a lubricating separant and 0.5-2 parts of an antioxidant. The epoxy asphalt additive is prepared under the condition of 110 to 140 DEG C. The softening points of the main raw materials such as the resin component, the curing agent, the hard asphalt particles and the like in the epoxy asphalt additive are controlled within the range of 90-130 DEG C, and the epoxy asphalt additive for road and bridge pavement is prepared by adopting a 110-140 DEG C melt extrusion process. And then directly putting the mixture into a mixing cylinder of an asphalt mixing plant to prepare the high-performance epoxy asphalt concrete with high-temperature rut resistance, low-temperature crack resistance and medium-temperature fatigue resistance.

The invention discloses a preparation method of a cement-based crack grouting material for roads and bridges and relates to the technical field of bridge concrete crack grouting materials. The preparation method comprises the following steps: firstly, weighing the following raw materials: composite cement, composite emulsion, pearlite sand, halloysite clay, sepiolite fabric, epoxy chloropropane graft copolymerization modified bone glue, fibrous xonotlite, a composite water repellent, a composite coupling agent and composite rubber powder; grading and chopping the sepiolite fabric; crushing andactivating the halloysite clay and xonotlite; and mixing and stirring the materials. The crack grouting material disclosed by the invention has the advantages of excellent slurry performance, bondingperformance, process performance and construction negative temperature action resistance, strong environmental adaptability, high stress resistance and wide application prospect.