26 results about "Water reducer" patented technology

The invention belongs to the technical field of concrete. The invention relates to recycled concrete and a preparation method thereof. The recycled concrete comprises the following raw materials in parts by weight: 150-200 parts of a recycled concrete aggregate, 400-450 parts of cement, 700-800 parts of sand, 1000-1100 parts of stones, 120-150 parts of mineral powder, 50-100 parts of fly ash, 3-7parts of an expanding agent, 5-10 parts of a tackifier, 4-8 parts of a water reducing agent and 150-200 parts of water. Concrete waste is subjected to crushing, hydrochloric acid solution soaking, sodium silicate solution soaking and polyvinyl alcohol solution soaking to prepare the recycled concrete aggregate, and gaps of the concrete waste are filled, so that the mechanical property of the recycled concrete aggregate is improved. The recycled concrete prepared in the invention has excellent mechanical properties, and is suitable for constructional engineering with high requirements on concrete.

The invention discloses C50 high performance concrete prepared from a fully-recycled fine aggregate, the C50 high performance concrete includes the following components: a binding material, a coarse aggregate, a fine aggregate, a water reducing agent and water, wherein the fine aggregate is the fully-recycled fine aggregate, the amount of binding material is 400-430kg / m<3>, the water-binder ratio is 0.33-0.35, the sand rate is 38%-40%, and the amount of the coarse aggregate and the amount of the fully-recycled fine aggregate are calculated according to volume method, and the water reducing agent neat dosage is 0.3 to 0.5% of the dosage of the binding material. The C50 high performance concrete breaks through the problem of low strength of recycled aggregate concrete, micro powder in the fully-recycled fine aggregate is effectively used for filling aggregate voids, the dosage of the binding material can be reduced by 20kg-80kg in each cubic meter of concrete, environment is protected, and cost is saved.

The invention discloses sticky-rice mortar and a preparation method thereof. The sticky-rice mortar comprises, by weight, 15-30 parts of sticky-rice flour, 100-180 parts of calcium hydroxide powder, 200-300 parts of calcium carbonate granules, 20-30 parts of sand, 1-5 parts of cellulose, 15-25 parts of fine aggregate, 3-12 parts of pre-gelatinized sticky-rice flour, 0.8-1.6 parts of a water reducer, 75-150 parts of water, 5-12 parts of red soil, 10-15 parts of coal ash, 10-20 parts of modified metakaolin and 10-15 parts of modified clay. The sticky-rice mortar has the advantages of fast curingspeed, small shrinkage and high strength.

The invention discloses a coating material for sealing the coal wall of a gob-side coal roadway. The coating material comprises 100 parts of cement, 3-6 parts of an environmentally-friendly interfacepolymer solid material and 10-15 parts of a mineral mixture and other additives, the environmentally-friendly interface polymer solid material comprises, by mass, 100 parts of an acrylate polymer solid and 8-9 parts of polyethylene synthetic resin, and the mineral mixture and other additives comprise, by mass, 5-10 parts of silica fume, 10-15 parts of common fly ash or slag, 1-2 parts of a superplasticizer and trace parts of basalt chopped fibers. The coating material is a novel composite material for guniting, and meets the requirements for plugging the coal wall of the gob-side coal roadway.

The invention relates to the technical field of construction and building materials, in particular to photocatalytic concrete prepared with a phosphogypsum-based hydraulic composite binding material and a preparation method of the photocatalytic concrete. The photocatalytic concrete is prepared from phosphogypsum, slag powder, limestone powder, portland cement, broken glass slag, wind-blown sands,a foamer, a foam stabilizer, a water reducer and a photocatalytic organic adhesive. The photocatalytic concrete provided by the invention can be used to improve the indoor air pollution problem, particularly perform adsorption and degradation on harmful gas including formaldehyde, the improvement can be finished under the condition of natural illumination without more energies and operation steps, and the photocatalytic concrete has market value. The photocatalytic concrete is suitable for the field of indoor decorative materials including light wall body materials, gypsum wall body articlesand ceiling decorative plates.

The invention discloses a concrete high-efficiency water reducer. The water reducer comprises the following raw materials in parts by weight: 20-40 parts of unsaturated alcohol-polyoxyethylene ether,10-30 parts of sodium lignin sulfonate, 10-20 parts of acrylic acid, 5-10 parts of modified starch, 3-8 parts of aloe gel, 2-6 parts of cyclodextrin, 2-5 parts of cross-linked povidone, 2-5 parts of zinc gluconate, 1-3 parts of sodium polystyrenesulfonate, 1-3 parts of sodium alginate, 0.5-2 parts of graphene oxide, 0.2-1 part of sodium silicate, 0.1-0.5 part of a defoaming agent and 3-5 parts ofan initiator. The high-efficiency water reducer prepared by the method is good in stability, and can increase workability of concrete when used in the concrete. In addition, the water reducer can be mixed with other water reducing agents for use, the water adding amount is reduced, the solidification time of concrete is shortened, and strength of the concrete is improved.

The invention relates to the field of concrete production, and particularly discloses high-ductility concrete as well as a preparation method and equipment thereof. The high-ductility concrete is prepared from coarse aggregate, fine aggregate, quartz sand, cement, water, coal ash, coumarone resin, polyvinyl alcohol fiber, permanganate and a water reducing agent. The preparation method comprises the following steps: firstly, adding the cement, the quartz sand, the fly ash, the coarse aggregate, the fine aggregate, the polyvinyl alcohol fiber and the coumarone resin into a stirrer for mixing to obtain a first mixture, then mixing and stirring the water reducing agent and the water to obtain a second mixture, then adding the permanganate into the second mixture to obtain a third mixture, and finally, adding the third mixture into the first mixture to obtain the high-ductility concrete. The equipment comprises a rack, a stirring barrel, a stirring assembly, a driving mechanism, a scraping assembly and a lifting assembly. The high-ductility concrete has the effects of enhancing the overall mechanical property of the high-ductility concrete and widening the application range of the high-ductility concrete.

The invention discloses an environmental-friendly water-resistance high-strength ceramic gum and a preparation method. The gum comprises, by weight, 20-50 parts of acrylic emulsion, 50-80 parts of artificial quartz, 1-6 parts of hydroxypropyl methylcellulose slurry, 0.05-0.2 part of a water reducer and 0.1-2 parts of a preservative, wherein the mass fraction of the hydroxypropyl methylcellulose slurry is a hydroxypropyl methylcellulose aqueous solution. The invention provides the preparation method of the environmental-friendly water-resistance high-strength ceramic gum with a simple technology and low cost, and the method aims at improving the doping amount of the quartz powder while the constructivity of the gum is ensured to improve the flexibility and water resistance of the gum.

The invention discloses concrete for a prefabricated part and a preparation method thereof, which relate to the technical field of concrete, and solve the problems that harmful substances such as acidand alkali ions are easy to permeate inwards through tiny gaps and cracks of the concrete, so that the volume of a steel bar is expanded, and the prefabricated part is damaged. The concrete for a prefabricated part comprises the following components in parts by weight: 180-200 parts of Portland cement, 170 to 180 parts of water, 720 to 760 parts of medium sand, 1020 to 1050 parts of broken stone,70 to 80 parts of fly ash, 170 to 190 parts of mineral powder, 3 to 5 parts of a water reducing agent, 2 to 3 parts of a retarder, 4 to 8 parts of an anti-permeability agent, 6 to 10 parts of methylsodium silicate, 5 to 9 parts of triethoxysilane, and 15 to 35 parts of organic silicon water-soluble resin. The concrete for the prefabricated part has excellent chemical corrosion resistance, has agood protection effect on steel bars in the prefabricated part, and is good in overall application effect.

The invention relates to the field of building materials, and particularly discloses a shield grouting material and a preparation method thereof. The shield grouting material is prepared from the following raw materials in parts by weight: 80 to 120 parts of cement, 180 to 300 parts of fly ash, 200 to 350 parts of sand, 50 to 80 parts of bentonite, 2 to 4 parts of a thickening agent, 0.5 to 1.5 parts of an expanding agent and 0.5 to 3 parts of a water reducing agent, the thickening agent is prepared from silica fume, hydroxypropyl methyl cellulose and diallyl phthalate; the shield grouting material prepared by the invention has a relatively high condensation speed.

The invention relates to the field of concrete, and particularly discloses an impermeable and anti-crack concrete and a preparation method thereof. The impermeable and anti-crack concrete is prepared from cement, mineral powder, an expanding agent, sand, stone, a water reducing agent, a synergist, m-xylylenediamine, p-tolualdehyde and water. The preparation method comprises the following steps: S1, uniformly mixing the cement, the water reducing agent, the synergist, the m-xylylenediamine and the p-tolualdehyde to form a premixed material; S2, adding water into the premixed material, and uniformly mixing to form premixed slurry; S3, adding the mineral powder, sand and stone into the premixed slurry, and uniformly mixing to form an anti-seepage and anti-crack concrete mixture; and S4, pouring the impermeable and anti-crack concrete mixture into a mold, conserving, and curing to form the impermeable and anti-crack concrete. The concrete has the advantage of high compressive strength. In addition, the preparation method has the advantage that the prepared concrete is good in quality.

The invention discloses a mud-resistant early-strength enhanced polycarboxylate superplasticizer and a preparation method thereof. The preparation method comprises the steps that acrylic acid, a mud-resistant monomer 1 and deionized water are mixed to be uniform, and a solution A is obtained; uniformly mixing a reducing agent and the deionized water to obtain a solution B; uniformly mixing an early strength agent, a reinforcing agent and the deionized water to obtain a solution C; and adding polyether, a mud-resistant monomer 2 and the deionized water into a reactor with a stirring function, adding an initiator, uniformly mixing the materials, dropwise adding the solution A and the solution B, supplementing water, dropwise adding the solution C at a constant speed, and uniformly mixing, thereby obtaining the mud-resistant early-strength enhanced polycarboxylate superplasticizer. According to the mud-resistant early-strength enhanced polycarboxylate superplasticizer and the preparationmethod thereof, the mud-resistant early-strength enhanced polycarboxylate superplasticizer is used for concrete production, workability such as workability, wrapping performance and pumpability of concrete can be excellent, and the early strength and the later strength of the concrete are improved.

The invention discloses a light-weight medium-high pressure mold and a preparation method thereof. The light-weight medium-high pressure mold comprises the following raw materials by weight: cement, wherein the cement is P.O42.5 and above ordinary Portland cement; ceramsite, wherein the density grade of the ceramsite is greater than or equal to 700, and the particle diameter is 8-12 mm; sand, wherein the sand is medium-coarse sand, and the modulus of the sand is 2.4-3.3#; a water reducing agent, wherein the water reducing agent is a polyhydroxy acid high-efficiency water reducing agent, and the mixing amount is 0.5-1%; and silica fume powder, wherein the particle size of the silica fume powder is less than 5 [mu]m, the water/binder ratio is 0.3-0.35, the ratio of the cement to the silica fume to the ceramsite to the sand is 48-52:1.5-3.5:16-20:55-60, the compressive strength of the mold is 40-45 Mpa, and the density of the mold is 1500-1600 kg/m<3>. On the premise that the compressivestrength is kept, the weight of the mold can be reduced by about 30%.

The invention discloses a concrete water reducer, which is prepared by mixing acrylic acid, methyl methacrylate and sodium hydrogensulfite. The concrete water reducer has low production cost and good operating effect.

The invention discloses single-size-fraction coal gangue self-compacting concrete. The single-size-fraction coal gangue self-compacting concrete comprises he following components in parts by weight: 592 to 761 parts of natural aggregate, 85 to 254 parts of coal gangue, 700 to 800 parts of river sand, 100 to 130 parts of fly ash, 400 to 500 parts of cement, 1 to 3 parts of a water reducing agent and 190 to 210 parts of water, wherein the coal gangue is single-size-fraction coal gangue with a particle size ranging from 10 mm to 20 mm. According to the single-size-fraction coal gangue self-compacting concrete provided by the invention, the adopted single-size-fraction coal gangue aggregate is convenient to screen compared with the existing continuous-grade coal gangue aggregate, so preparation cost is greatly reduced; the characteristics of large porosity and strong water absorption of the crushed coal gangue are utilized, and the coal gangue is used as an internal curing material, so the later hydration of the concrete is promoted, and the strength of the concrete is favorably improved; and the coal gangue is used for replacing a part of natural aggregate, so the problem of environmental pollution is effectively solved, the problem of scarcity of natural coarse aggregate in China is overcome, and high economic benefits are achieved.

The invention relates to the technical field of dry-mixed mortar, and particularly discloses high-strength anti-crack masonry dry-mixed mortar and a production process thereof. The high-strength anti-crack masonry dry-mixed mortar is mainly prepared from the following raw materials in parts by weight: 780 to 860 parts of sand, 100 to 130 parts of cement, 40 to 60 parts of fly ash, 0.5 to 0.8 part of cellulose ether, 0.3 to 0.5 part of viscose fibers, 2 to 3 parts of a water reducing agent and 5 to 15 parts of an anti-cracking agent; and the anti-cracking agent is composed of at least one of chitosan and butadiene styrene rubber and aliphatic hyperbranched polyester according to a mass ratio of (2.5-5):(7-12). The high-strength anti-crack masonry dry-mixed mortar can be used for construction operations such as building construction and house decoration, and has the advantages of high strength and cracking resistance.