67results about How to "Reduce unit water consumption" patented technology

The invention relates to a rare earth separation method with the material linkage cyclic utilization function. The rare earth separation method comprises the following steps: the organic phase of loaded rare earth prepared by extractant A and rare earth soap stock through mixing is used for the follow-up linkage extraction separation, and inorganic acid in the residual water phase is extracted and concentrated by extractant C and is then reused for material dissolving or recovering rare earth with oxalic acid precipitated therein; purified rare earth solution is subjected to extraction separation, the rare earth is precipitated through oxalic acid, sediment mother solution containing oxalic acid and inorganic acid is mixed with extractant B, the oxalic acid is extracted to be reused for precipitating rare earth, and the residual inorganic acid is directly used for washing and back extraction processes or is used for material dissolving after being concentrated by the extractant C. With the rare earth separation method provided by the invention, intermediate materials generated in the rare earth separation process can be recycled in process sections in a linkage manner, the alkali saponification process is avoided, and the material dissolving, washing and back extraction processes can be finished only by the recycled inorganic acid, so that the rare earth separation and purification process disclosed by the invention does not consume alkaline and inorganic acid, the cost is low, and the rare earth separation method is green and environmental-friendly.

The invention provides a controllable low-strength backfill material and a preparation method thereof. The controllable low-strength backfill material is prepared by adding fly ash, cement, water, a water reducing agent and a soil dispersing agent into a basic raw material and fully and uniformly mixing the mixture, wherein the basic raw material is a mixture of crushed engineering residue soil, mixing plant waste residues and sludge. The prepared controllable low-strength backfill material comprises the following components in parts by weight: 30-45 parts of engineering residue soil, 20-30 parts of mixing plant waste residues, 10-20 parts of sludge, 5-10 parts of fly ash, 5-20 parts of cement, 10-25 parts of water, 0.1-2 parts of a water reducing agent and 0.1-2 parts of a soil dispersing agent. Through the mode, the synergistic effect of all the raw materials can be fully utilized, the utilization rate of waste resources is effectively increased, meanwhile, the backfill material which is high in flow state, self-compacting and controllable in unconfined compressive strength is prepared, and the requirements of practical application are met.

The invention relates to an anti-crack construction waste recycled concrete wallboard which comprises a wallboard assembly. The wallboard assembly comprises a wallboard body, and the wallboard body comprises a fireproof layer and a concrete layer. The concrete layer is prepared from the following raw materials in parts: 22-34 parts of recycled coarse aggregate, 33-43 parts of recycled fine aggregate, 46-72 parts of anti-crack cement, 1-13 parts of steel fibers, 1-3 parts of a water reducing agent, 1-4 parts of a reinforcing agent, 5-9 parts of mineral powder, 5-8 parts of nano silicon dioxide and 120-230 parts of water. The crack resistance of the concrete layer can be greatly improved; the flowability of a concrete mixture is improved, and high economic benefits are achieved; the durability and wear resistance of the concrete surface can be improved; and a wallboard installation limiting function can be achieved, and installation is convenient.

The invention discloses high-performance concrete for building. The concrete is prepared from the following raw materials in parts by weight: 32 to 36 parts of Portland cement, 28 to 30 parts of quartz sand, 24 to 26 parts of fly ash, 22 to 24 parts of superfine mineral powder, 18 to 22 parts of bechilite powder, 14 to 16 parts of polyethylene glycol oxide, 3 to 5 parts of titanium fiber, 4 to 8 parts of fatty alcohol-polyoxyethylene ether, 8 to 10 parts of thermal stabilizers, 3 to 4 parts of anti-aging agents, 1 to 2 parts of water-reducing agents, 2 to 3 parts of waterproof agents and 20 to22 parts of water. The high-performance concrete for building has the advantages that the concrete has excellent intensity and durability; meanwhile, the raw material ingredients are safe and non-toxic and achieve the environment-friendly effects; high practical values and good application prospects are realized.

The invention discloses a preparation method of a micro-nano porous impermeable crack-resistance concrete additive, and belongs to the technical field of building water resistance. The preparation method comprises following steps: 1, preparation of a polycarboxylic acid water reducer; 2, raw material mixing; 3, additive mixing; and 4, finished product preparation. According to the preparation method, combined water resistance is replaced by concrete structure type water resistance, water-proof material cost is reduced greatly, multi-layer water-proof construction process is avoided, so that construction time is shortened, construction working efficiency is increased greatly, artificial construction steps are reduced greatly, artificial cost is reduced, and artificial construction imbalancehidden trouble is avoided; a concrete self water-proof system is adopted, so that water resistance lasting period is as long as building service life, in the prior art, maintenance cost is extremelyhigh because of leakage caused by various factors in water proof construction, while almost no daily maintenance is needed in the invented technology.

The invention provides an efficient concrete composite water reducing agent which consists of the following components in parts by weight: 10-40 parts of a polycarboxylic acid mother liquid, 4-15 parts of an air entraining agent, 15-30 parts of lyophilic colloid, 0.1-1 part of a retarder, 0.8-2 parts of mirabilite, 1-5 parts of calcium lignosulphonate, 5-20 parts of a cellulose water retaining material and 30-70 parts of water. The efficient concrete composite water reducing agent is applied to preparation of concrete, the mass ratio of the efficient concrete composite water reducing agent to the concrete is (0.0001-0.1):(20-300). The efficient concrete composite water reducing agent has properties such as slow release, collapse prevention, high early strength and water retention, is capable of greatly reducing the unit water consumption of the concrete, improving the density of the concrete, greatly reducing the amount of cement, reducing the shrinkage and improving the stability of the concrete, has the characteristics of being low in doping quantity and remarkable in effect when being used in the concrete, in addition is environment-friendly, and has very good economic benefits and social benefits.

The invention provides a water-reducing agent for concrete and a preparation method thereof. The water-reducing agent for concrete is prepared from the following components in percentage by mass: 2.5-4.5% of amino benzene sulfonate, 8-11% of sodium metabisulfite, 12-18% of methacrylic acid, 8-16% of acrylic acid, 6-15% of methyl methacrylate, 5-15% of sodium p-aminobenzenesulfonate, 3.5-8.5% of phosphinobutane tricarboxylic acid, 7.5-14.5% of lauryl sodium sulfate, 6.5-10.5% of stabilizer, 13-25% of enhancing component and 10-15% of curing component. The water-reducing agent for concrete provided by the invention has the beneficial effects that the unit consumption of water is reduced, the fluidity of concrete mixture is improved, simultaneously the strength of the cured concrete also canbe obviously enhanced, the cracking of the concrete can be avoided, the benefit for ensuring the sufficiency of concrete reaction is achieved and the comprehensive property of the concrete can be improved.

The invention relates to a crack-resistant construction waste recycled concrete wallboard, which includes a wallboard assembly, the wallboard assembly includes a wallboard body, the wallboard body includes a fireproof layer and a concrete layer, and the concrete layer consists of the following parts Made of raw materials: 22-34 parts of recycled coarse aggregate, 33-43 parts of recycled fine aggregate, 46-72 parts of crack-resistant cement, 1-13 parts of steel fiber, 1-3 parts of water reducing agent, 1 part of reinforcing agent ~4 parts, mineral powder 5~9 parts, nano silicon dioxide 5~8 parts, water 120~230 parts. The invention can greatly increase the crack resistance of the concrete layer; improve the fluidity of the concrete mixture and have strong economic benefits; can improve the durability and wear resistance of the concrete surface; and can realize the installation limit of the wallboard function, easy to install.

The invention provides an efficient set-retarding and water-reducing agent for cement concrete and a preparation method of the efficient set-retarding and water-reducing agent. The efficient set-retarding and water-reducing agent comprises the following components in parts by weight: 30 to 50 parts of polycarboxylic acid mother liquid, 3 to 5 parts of poly-aluminum chloride, 0.5 to 2 parts of sodium polyaspartate, 10 to 30 parts of allyl polyoxyethylene ether, 0.5 to 0.8 part of coco fatty acid diethanol amide, 5 to 10 parts of hydrogen peroxide, 0.5 to 1.2 parts of mirabilite, 3 to 10 parts of an air entraining agent, 15 to 30 parts of hydrophilic colloid, 1 to 3 parts of a set retarder, 5 to 10 parts of fiber, 1 to 5 parts of asbestos wool, 0.1 to 0.2 part of an initiator and 30 to 50 parts of deionized water. The efficient set-retarding and water-reducing agent is prepared by optimizing the components of the set-retarding and water-reducing agent, modifying part of the components and mixing, so that the efficient set-retarding and water-reducing agent has high compatibility with cement, is small in mixing amount and high in water-reducing rate, can enhance the compression resistance and the fracture resistance of concrete, has a good set-retarding effect, long concrete setting time, high strength and high construction performance, saves construction materials, can save waterand electricity and has high practical value.

The invention discloses a civil engineering material curing agent. The civil engineering material curing agent is characterized by being prepared from the following materials in percentage by weight:1.3 to 7 percent of a water reducer, 2.5 to 9 percent of an anti-seepage agent, 1.5 to 13 percent of sodium hydroxide, 1.8 to 25 percent of sodium oxide, 1.3 to 21 percent of maleic acid, 1.7 to 23 percent of silicate, 2.5 to 28 percent of a gel material, 5 to 11 percent of triethanolamine, 7 to 13 percent of a surfactant, 15 to 29 percent of water, 35 to 65 percent of cement and 20 to 45 percentof quick lime powder; the surfactant is prepared from sodium nitrite, fatty acid amide, alkylamine and acidic ammonium phosphate; the sodium nitrite, the fatty acid amide, the alkylamine and the acidic ammonium phosphate are compounded according to the ratio of (2.3 to 4.3) to (1.2 to 2.5) to (1.9 to 3.4) to (1.3 to 2.4). By adopting the civil engineering material curing agent, the problem that the anti-freezing performance of the curing agent is relatively poor under a severe cold climate is solved.

The invention discloses high-strength and low-hydration-heat marine concrete and a preparation method thereof. Limestone powder and cement are uniformly stirred to enable the gaps of the cement particles to be filled with the limestone powder, so that the compactness of a cement base system is improved; then, slag powder and fly ash are added to improve the fluidity, cohesiveness and water retention of the concrete mixture, and therefore, the concrete mixture is easy to pump, pour and mold; then, silicon powder is added to form C-S-H gel, one part of the C-S-H gel coats the surface of a cementing material, the other part of the C-S-H gel fills the pores of sand, gravels and cement particles which are added later; and the cement particles are further helped to be dispersed through a water reducing agent, the unit water consumption is reduced, and the fluidity of the concrete mixture is improved, so that the marine concrete with uniformly dispersed internal system particles and high compactness is finally obtained.

The invention discloses a method for preparing concrete, comprising the following steps: (1) material obtaining: taking sludge, construction waste, coal ash and cement and putting into stirring equipment; (2) stirring: pouring water into the stirring equipment and starting the stirring equipment, and introducing air into a stirring shaft in the stirring process, so that outwards sprayed airflow isgenerated on the stirring shaft and impacts the material in the stirring equipment; (3) performance improvement: adding reinforcing fiber to the material obtained by stirring in step (2) and furtherstirring to obtain the finished product. According to the invention, sludge, construction waste and coal ash are adopted as materials, so that waste of non-renewable resources such as gravels and sandis effectively reduced; and the stirring shaft can spray air to outwards in the stirring process, so that the condition of caking of the material is effectively prevented, the material is mixed moreuniformly, and therefore, the prepared concrete is better in performance.