2791results about How to "Improve early strength" patented technology

The invention provides a cement-based composite material used for a 3D printing technology as well as a preparation method and application thereof. The cement-based composite material is prepared from the following raw materials based on the total weight of the composite material: 33%-40% of cement, 0%-8% of inorganic powder, 32%-38% of tailing machine-made sand, 2.5%-3% of a high-molecular polymer, 0.1%-0.5% of a water reducing agent and 16.7%-20% of mixing water; a composite thickening time control agent, a thixotropic agent, a volume stabilizer and the like are added into a mixture to prepare an inorganic composite material; and then the inorganic composite material can be directly pumped into a 3D printer for building to be applied to construction. The cement-based composite material is an inorganic material and the materials are easily available; a lot of industrial waste materials can be used; therefore, the cement-based composite material is low in cost, energy-saving and environment-friendly; the condensation time can be flexibly controlled, and the material has super early strength, good caking property and strong stability; the requirements of 3D printing construction continuity of the building and the building strength are met so that the house building has good global stability and use safety; and the application and popularization of 3D printing technology can be greatly promoted.

The invention discloses a lightweight high-performance foam concrete, which is composed of the following components in parts by weight: 50 to 60 parts of cement, 20 to 35 parts of mineral slag, 15 to 20 parts of fly ash, 5 to 10 parts of gypsum, 60 to 80 parts of fine aggregate, 2.7 to 7.3 parts of additive, 0.1 to 0.2 part of fiber, 32 to 45 parts of water, and 5 to 25 parts of foam. The invention also discloses a preparation method of the foam concrete. The foam concrete has the advantages of small volume-weight, high strength, low water absorption, and small contraction rate, and has the waterproof and anti-cracking functions at the same time.

The invention discloses a concrete early-strength agent, which is characterized in comprising the following components according to weight percentage: inorganic salt early-strength component 35-55 percent, organic early-strength component 5-10 percent, water reducing component 15-25 percent, wherein the inorganic salt early-strength component is prepared by at least two among sulfate, carbonate, nitrate, and nitrite; the organic early-strength component selects any one among calcium formate, sodium acetate, calcium oxalate, triethanolamine, tri-iso-propanolamine and carbamide; the water reducing component selects one among naphthalenesulfuric acid type, melamine type and polycarboxylate type. The invention makes the concrete be coagulated and hardened rapidly under the condition of low temperature, so that the early strength of the concrete is greatly improved as well as later strength is ensured.

The invention relates to an assembled splicing joint sealing material for building components and an application thereof. The sealing material is prepared from raw materials in parts by weight as follows: 100 parts of cement, 0-150 parts of active admixture, 0.01-10 parts of water reducer, 0.01-10 parts of early strength agent, 0-10 parts of thickening time control agent, 0.1-30 parts of expanding agent, 0-30 parts of bonder, 0.01-30 parts of plastic retaining agent, 0.01-10 parts of starch ether, 0-10 parts of thixotropic lubricant and 0-300 parts of quarts sand. The sealing material can be applied to sealing joint of concrete components spliced. Compared with the prior art, the sealing material is good in construction performance, and can be used by adding water to stir. The sealing material can be quickly constructed by a caulking gun or an electric caulking device, and the operating time is long. Newly mixed slurry has good plasticity, adhesive force and resistance to falling. The sagging phenomenon is further avoided when a vertical direction is spliced. The condensing time is adjusted according to the project demand, the early strength is high and the later strength is continuously increased.

The invention provides single-component t high-performance mortar for repairing and reinforcing concrete, which comprises the following components in part by mass: 200g of sand, 55 to 75 parts of ordinary portland cement, 10 to 30 parts of sulphate aluminium cement, 3 to 7 parts of siliceous dust, 8 to 12 parts of flyash, 0.18 to 0.22 part of water reducing agent, 2 to 4 parts of flexibilizer, 0.04 to 0.06 part of water-retaining agent, 1.0 to 2.0 parts of swelling agent and 0.1 to 0.2 part of polymer synthetic fiber. The single-component t high-performance mortar has the advantages of high initial strength, good adhesion, excellent cracking resistance, low ratio of compressive strength to flexural strength, excellent toughness, simple and convenient construction, single component, no toxin or smell, no harm to human bodies, and environmental protection without pollution.

The invention relates to a lightweight energy-saving insulating concrete, belonging to building materials. The invention comprises the master batches and accessories in accordance with the following parts by weight: master batches: 30-70 parts of cementing materials, 25-60 parts of fillers, 5-10 parts of strength activators, and accessories: 1-3 parts of waterproof agents, 2.0-3.0 parts of bleeding agents, 2.0-5.0 parts of suspending agents, 0.1-0.5 part of foam stabilizer, 38-60 parts of honeycomb agents, 0.5-1.5 parts of rusty retardant agents, 0.02-10 parts of reinforcing agents, 1.2-4.2 parts of early strength agents and expanding agents and 0.6-1.4 parts of acid and alkali resistant fibers. The concrete has the advantages of high early tensile and compressive strength, no decrease and crack of later strength and simple manufacturing process. According to the requirement of the building structure, the technical target of the concrete can be realized by regulating the mixing proportion. The concrete can be used for manufacturing various products at normal temperature and is widely applied to insulating and self-waterproof building engineering.

The invention provides a grinding aid for slag cement. The grinding aid provided by the invention comprises the following components by weight percent: 5-20wt% of alcohol amine compound, 0.1-5wt% of hydroxypropyl methyl cellulose, 5-30wt% of polyhydric alcohol compound, 0.5-10wt% of sodium hexametaphosphate, 1-10wt% of soluble sulfate, 1-8wt% of sodium dodecyl benzene sulfonate and the balance of water. In the grinding agent provided by the invention, the hydroxypropyl methyl cellulose is beneficial for stimulating the activity of the slag, forming stable hydrous products in the reaction process, improving the property of the cement, improving the strength of the cement and improving the stability of the liquid grinding aid at the same time. Experimental result shows that the grinding aid is capable of increasing the breaking strength of the cement to 9.5MPa and increasing the compressive strength to about 55MPa.

The invention relates to a high-performance sand-soil consolidation material, as well as a preparation method and a using method thereof. The high-performance sand-soil consolidation material belongs to a mortar composition and is characterized by comprising the following raw materials in parts by weight: 5-40 parts of cement clinker, 3-6 parts of gypsum, 4-10 parts of alkali additive, 0.5-6 parts of compound activating agent, 1-4 parts of early strength agent, 2-10 parts of mineral activating agent, 3-8 parts of expansion agent and 22-77 parts of micro-powder formed by fine grinding of blast furnace water-quenched slag. The invention provides the high-performance sand-soil consolidation material which has the advantages of simple operation, convenient construction, good water resistance, fast consolidation, high early strength, stable improvement of post-strength, resistance to erosion of underground inorganic salt water, excellent anti-seepage performance and low production cost, as well as the preparation method and the using method thereof. The high-performance sand-soil consolidation material is suitable for consolidating mine tailings, natural weathered sand, fly ash, gravel, stone chips, stone powder, soil, sludge, construction waste, coal gangue and phosphorus slag into a solid material, and can be used for laying a subgrade, constructing a wall body and constructing a site foundation.

The invention discloses an ethers early strength type polycarboxylate water reducer and a preparation method thereof. The water reducer regards unsaturated esters, N,N-bis(2-hydroxyethyl)isopropanolamine (DIEPA), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), methyl allyl polyoxyethylene polyoxypropylene ether (TPEG) and the like as main chemical synthesis raw materials, and the main chemical synthesis raw materials are subjected to amidation and copolymerization in certain conditions under the action of a catalyst, an initiator, a chain transfer agent and the like, so that a high-molecular polymer with an amphoteric structure is obtained. The molecular structure of the water reducer comprises hydrophilic hydroxyl, hydrophilic carboxyl, hydrophilic acylamino, hydrophilic sulfonyl, hydrophobic carbon chains and a polyoxyethylene polyoxypropylene ether long-chain structure with certain stereo-hindrance effects, wherein an N containing group can improve early strength of concrete obviously. Therefore, the ethers early strength type polycarboxylate water reducer is applicable to pre-cast concrete components which need improvement of early strength.

The invention relates to an iron tailing-based complex mineral admixture and a preparation process thereof. The preparation process comprises the following steps of: respectively drying iron tailing sand, industrial waste slag and limestone till water content is not more than 1% for later use; adding gypsum to match with iron tailings, the industrial waste slag and the limestone after drying, then sending into a ball grinding machine to perform powder grinding, and adding grinding aids during the powder grinding process; and uniformly mixing the obtained iron tailing powder, industrial waste slag powder and limestone powder to obtain the iron tailing-based complex mineral admixture. The iron tailing-based complex mineral admixture disclosed by the invention has the beneficial effects that 1) the iron tailings are matched with other industrial waste slag, the admixture for concrete is prepared by simple mechanical fine grinding, and the performance is better; 2) the performance is good, and the iron tailing-based complex mineral admixture can be used for preparing the concrete with the strength grade of C50-C80; 3) a variety of industrial wastes are scientifically and effectively compounded, the activity and particle size synergy of each component against cement and the concrete can be fully exerted to enable the advantages of all the components to complement each other, and the over-superimposed effect is further realized; and 4) the production process is simple and conductive to industrial production, popularization and application.

The invention discloses polymer cement mortar for a slab ballastless track of a high-speed railway. The polymer cement mortar a comprises a dry raw material and a liquid raw material, wherein the dry raw material comprises a binding material component, an elastic adjusting component, an expanding component, an internal curing component, an aggregate component and a coagulation adjusting component; the liquid raw material comprises a polymer emulsion, a water reducing agent, a defoaming agent, an air entraining agent and water; and the weight ratio of the dry raw material to the liquid raw material is 100:(15-25), and the dry raw material and the liquid raw material are uniformly mixed in a proportion to prepare the polymer cement mortar. The polymer cement mortar has the advantages of controllable coagulation time, high adhering strength, adjustable elastic modulus, good elasticity and toughness, high durability and the like, and is capable of replacing cement emulsified asphalt mortar to be applied to a packing material of the slab ballastless track or can be used as a quick repairing material of a filling layer of cement emulsified asphalt mortar.

The invention discloses an environment-friendly colorful tile joint mixture. The environment-friendly colorful tile joint mixture is characterized by comprising the following components in percentage by weight: 35%-40% of white cement, 40.73%-47.75% of waste porcelain powder, 0-15% of quartz powder, 0-10% of titanium dioxide, 1%-1.5% of re-dispersible emulsion powder, 0.1% of water repellent, 0.15% of water-retaining agent, 0.4% of lignin fiber, 0.1%-0.25% of water reducing agent and 0-2% of pigment. The invention further discloses a preparation method of the environment-friendly colorful tile joint mixture. The consumption of quartz sand and heavy calcium powder is reduced by using the waste porcelain powder as the joint mixture filler; the early strength of the joint mixture is improved by virtue of early strength function of the white cement, so that the construction process requirements are satisfied. The waste porcelain powder is sintered at a high temperature, so that the physical and chemical performances are stable, the volume is stable, and the expansion-shrinkage coefficient is close to that of the tile; the material with the same expansion-shrinkage coefficient is used as the filler, so that the possibility that the tile joint mixture generates cracks can be further reduced.

The invention proposes a compounding formula and manufacture method of an early-strength polyocarboxy acid high performance water reducing agent. The compounding formula is as follows: (1) the mass ratio of 37 61.5percent allyl polyethyleneoxide ether water-soluble fluid with polymerization degree 37, allyl polyethyleneoxide ether, acrylic acid, 27.7percent acrylic amide water-soluble fluid, 26.2percent methyl propylene sulfonic acid sodium water-soluble liquid is 2321:882:311:276.7:542.2; (2) the consumed amount of the initiator hydrogen peroxide is 0.2percent of a monomer mole number; (3) the initiator Sodium bisulfoxylate is 0.06percent of a monomer mole number; (4) the five elements copolymerization is carried on in the 60percent density system under 55 DEG C. The invention synthesizes carboxylic acid series product with strong early-strength performance, which especially are used for increasing the early-strength of the concrete largely under the low temperature of the winter to speed up the concrete construction progress and enhance the use efficiency of the construction template though the adjustment of the formula and craft. The invention is suitable for the concrete project with high requirements for the concrete early-strength (within 2 days).

The present invention relates to emulsified asphalt modified by adopting water-base epoxy resin. It is characterized by that it utilizes water-base epoxy resin emulsion and solidifying agent to modify the emulsified asphalt, in which the general emulsified asphalt content is 100 portions, water-base epoxy resin emulsion content is 3-15 portions and the solidifying agent content is 20%-25% of water-base epoxy resin emulsion content.

The invention relates to a roadbed filler for a road and a preparation method of the roadbed filler. The roadbed filler for the road is characterized by being prepared from lime, pulverized fuel ash, phosphogypsum and stabilizer. The weight percentage of each material in the lime, the pulverized fuel ash and the phosphogypsum is 15% of lime, 30-50% of pulverized fuel ash and 35-60% of phosphogypsum; the sum of the weight percentages of the materials is 100%; the stabilizer is water glass or NaAlO2 (sodium metaaluminate); the adding amount of the water glass is 2-6% of total mass of the lime, the pulverized fuel ash and the phosphogypsum, and the adding amount of the NaAlO2 is 0.5-2% of total mass of the lime, the pulverized fuel ash and the phosphogypsum. Due to the roadbed filler for the road prepared by the method, not only can the early strength be improved, but also the problem of water stability can be solved.

The invention provides an aerated concrete block produced through using specially-made mineral waste residue and tailings steel slag and a production method of the aerated concrete block. The aerated concrete block is produced through the following steps: adding an additive A, an additive B and water in components as follows: 40 to 50% of specially-made mineral waste residue obtained in a such way that cinder is obtained through the production process of recycling steel slag discharged from Taizhou Zhenchang Industrial Waste Residue Comprehensive Utilization LTD and metallurgical and chemicalferrous waste residue, and then is water-quenched, 35 to 45% of tailings steel slag, 2 to 4% of cement clinker, 1 to 3% of gypsum, and 8 to 12% of modified wood, wherein the grain size of the specially-made mineral waste residue is less than or equal to 5 mm, the grain size of the tailings steel slag is less than or equal to 20 mm, the additive A accounts for 1% of the total weight of the components, the additive B accounts for 0.05% of the total weight of the components, and water accounts for 0.5 to 0.6 times of the total weight of the components; and conducting mixing, heating, air-entrapping, steaming and pressing, and curing in sequence. The aerated concrete block produced by adopting the production method is high in strength, and small in drying shrinkage value, and can meet the block standards of the A3.5 grade and the B09 grade in the JC1062-2007 foam concrete block standard.

An earth curing agent used in curing salinized soil with heavy salt is manufactured by ordinary silicate cement, water quenched blast furnace slag, fly-ash, active mineral doped material, lime hydroxides of alkali metal or alkali earth metal and chemical dispersing agent in proper proportion. The middle and strong salinized soil of sulfate can be cured effectively by doping 8%-12% earth curing agents.