47results about How to "Increase age intensity" patented technology

The invention discloses a silicate cement grinding aid and a preparation method thereof. The silicate cement grinding aid is prepared from the following main raw materials by weight: 3-6 parts of sodium hexametaphosphate, 2-5 parts of aluminum sulfate, 5-8 parts of tetra sodium salt of amino trimethylene phosphonic acid (ATMP.Na4), 4-6 parts of ethylene diamine tetra (methylene phosphonic acid) sodium, 38-45 parts of polymeric alkylol amine, 34-42 parts of triisopropanolamine, 8-12 parts of waste engine oil, 2-5 parts of sodium alpha-olefin sulfonate, 10-16 parts of sorbitol, 15-20 parts of diethylene glycol, 8-13 parts of polypropylene wax, 6-10 parts of oxidized polyethlene wax, 4-8 parts of lignite wax, 20-30 parts of odium thiosulfate, 12-18 parts of sodium thiosulfate and 15-20 parts of quicklime powder. The prepared silicate cement grinding aid has the advantages that the quality is stable, the effect is remarkable, the adding amount is small, the use is simple, and the adding is more convenient and reliable to control.

The invention relates to an ecotypic cementing material, which comprises the components of: 40-60 parts of building waste brick powder, 15-30 parts of slag, 10-20 parts of steel plant semi-dry sintering flue gas desulfurization ash, and 10-15 parts of a composite grinding aid activator, which is prepared by raw materials in the following weight ratio: 70-85 parts of calcination modified desulfurization gypsum, 5-10 parts of sodium metasilicate pentahydrate, 5-10 parts of sodium aluminate, 1-5 parts of a naphthalene-based water reducer, 0.1-0.5 part of triethanolamine, 0.05-0.1 part of potassium humate, and 0.05-0.1 part of glycerol. The cementing material of the invention utilizes the synergetic and complementary effects of component materials, realizes resource utilization of building waste brick powder and semi-dry desulphurization ash as well as other solid wastes, thus making waste profitable.

The invention discloses a modified metakaolin-based permeation-resistant and crack-resistant agent for concrete. The modified metakaolin-based permeation-resistant and crack-resistant agent for concrete comprises: by mass, 10 to 75% of modified metakaolin, 5 to 40% of fine limestone powder, 4 to 40% of superfine coal ash, 1 to 20% of calcined hydrotalcite, 2 to 40% of fine quartz sand and 0.2 to 20% of solid silane powder. A preparation method of the modified metakaolin comprises the following steps of putting dry and washed kaolin into a bowl mill, carrying out grinding to obtain kaolin powder, carrying out calcination of the kaolin powder at a temperature of 500 to 1000 DEG C for 0.5 to 6.0 hours to obtain metakaolin, putting the metakaolin into a dispersion machine, adding an organic modifier of sulfamate or triethanolamine into the metakaolin, wherein a mass ratio of the metakaolin and the organic modifier is in a range of (5000: 1) to (100: 1), and carrying out dispersion to obtain the modified metakaolin having a contact angle of 50 to 100 degrees and a specific surface area of 8000 to 15000m<2>/kg. The modified metakaolin-based permeation-resistant and crack-resistant agentfor concrete can be utilized as a concrete additive, improves strength of concrete at different ages, does not produce obvious influences on concrete work performances, obviously improves anti-chloride ion penetration capability of concrete, reduces total shrinkage of concrete and improves crack resistance of concrete.

The invention discloses new ultrafine sand concrete. The new ultrafine sand concrete comprises the following components in parts by weight: 1.3 parts of cementing material, 1.5 parts of fine aggregate, 4 parts of coarse aggregate, 0.01 part of high efficiency water reducing agent and 0.32 part of water. The ultrafine sand concrete also contains expanding agent, water reducing agent, grinding aid, surfactant and reinforced fiber. By adopting the coordination of various components, particularly adding the reinforced fiber in the ultrafine sand concrete disclosed by the invention, the technical defect of the prior art that concrete is easy to crack can be overcome, the anti-seepage function of concrete can be enhanced and the cracking of concrete can be inhibited.

A multifunctional anti-cracking water-proofing agent for improving the flowability and slump of concrete, increasing the strength, impervious performance and compactness of solidified concrete, and decreasing the consumption of water is prepared proportionally from high-concentration naphthelene-series efficient water reducing agent, sodium laurylsulfate, sodium gluconate, hydroxypropyl methylcellulose, vinyl acetate-ethene copolymer emulsion and water through sequential mixing and stirring.

The invention relates to modified and activated phosphorus slag, a preparation method and modified and activated phosphorus slag cement and concrete. The modified and activated phosphorus slag consists of an activating agent and phosphorus slag in mass ratio of (0.5-1):10; the moisture in the phosphorus slag is less than 2% of the weight of the phosphorus slag; and the activating agent consist of the following components in parts by weight: 50-70 parts of carbide slag, 0-40 parts of aluminum sulfate slag, 0-40 parts of red mud, 0-30 parts of high-aluminum fly ash, 20-30 parts of gypsum and 0-30 parts of anhydrous calcium sulphoaluminate mineral. The modified and activated phosphorus slag eliminates the influence of harmful ingredients in the phosphorus slag on the properties of cement and concrete, shortens the cement setting time and improves the cement intensity, and simultaneously improves the intensity of concrete at each age, and the drying shrinkage rate at each age is less than the drying shrinkage rate of slag powder. The activating agents used for modifying and activating the phosphorus slag are various industrial residues and do not contain chemi-excitation reagents, have no adverse effects on the service performance, endurance quality and the like of cement and concrete, enable application of high phosphorus slag content in cement and concrete, and achieve the purpose of changing waste into valuable.

The invention relates to a grouting material for rock mass cracks of rock caves and a preparation method therefor. The method comprises the steps: a. mixing hydraulic-activity oyster dust, silica sandand metakaolin which are in the mass ratio of 4: 5: 1; b. adding an expanding agent AEA, of which the weight accounts for 5% of total mass, into the mixture, and carrying out uniform stirring in a stirrer; and c. stirring the mixed powder for 20 minutes for later use by a water-cement ratio of 0.37. According to the grouting material, slurry of a reinforcement material has an initial setting timeof about 275min and a final setting time of about 9 hours, the set shrinking percentage of the slurry is lower than 0.08%, the average porosity is 43.95%, the compressive strength in 50 days is not lower than 24MPa, the folding strength is not lower than 5.5MPa, and the compressive strength of 18 freeze-thaw cycles is 25.94MPa. More choices are provided for solving the problem of crack grouting of cave temples.

The invention discloses a composite concrete grinding-assistant reinforcing agent which is prepared by using the following methods: adding 500kg of polycarboxylic acid copolymer, 90kg of triisopropanolamine, 100kg of triethanolamine, 40kg of propanediol and 70kg of glycol into a reaction container; heating to 50-60 DEG C; stirring for 0.5-1.5 hours to uniformly mix to prepare a mixture No.1; adding 50kg of esterifying agent, 250kg of carbamide, 180kg of calcium formate and 20kg of adjusting solidification agent into 700kg of water; fully stirring for 0.5-1.0 hour at 50 DEG C-60 DEG C to prepare a mixture No.2; and keeping the temperature of the mixture No.1 at 50 DEG C-60 DEG C, slowly pouring the mixture No.2 into the No.1 mixture while stirring; fully stirring for 0.5-1.5 hours to obtain the composite concrete grinding-assistant reinforcing agent which is brown liquid and hardly precipitates. The invention has the advantages of favorable stability performance, no influence on cement condensation time, electricity saving, chlorine free, enhancement, simple use, low doping content, small investment and the like, improves output table yield of the cement by 15 percent to 30 percent and improves the age strength of the cement.

The invention discloses a titanium slag-based solid waste cementing material and a preparation method thereof. The titanium slag-based solid waste cementing material comprises the following raw materials by weight: 70-80% of a titanium slag-based material, 15-25% of gypsum, and 2.5-7.5% of cement clinker. The preparation method is simple, and the used materials are subjected to separate or mixed grinding according to different types of grindability differences, and then are mixed and stirred. In the raw materials, the titanium-containing slag-based material is used as a main component and is matched with the cement clinker and the gypsum to form the gel material, so that effective comprehensive utilization of a large amount of high-titanium-containing slag and industrial byproduct gypsum resources produced by iron and steel enterprises in Panzhihua, Leshan sand bay and the like in the southwest region can be realized, most of conventional engineering applications can be met, and the material can also be used in a construction environment with rich tunnel terrestrial heat.

The invention discloses an ultrafine inorganic grouting material for tunnel inverted arches. The grouting material comprises, by mass, 75-90% of an ultrafine cementing material, 5-20% of a mineral filler, 2.5-7.5% of a composite expansion agent, 0.04-0.08% of a fluid volume stabilizer, 0.5-1.5% of a film forming modifier, 0.4-0.8% of a water reducer, 0.02-0.05% of a defoamer, 0.1-0.4% of a dispersant, 0.05-0.1% of an anti-seepage water repellent and 1-5% of a nano-reinforcing component. Above components are uniformly mixed, water is added according to a water-cement ratio of 0.25-0.30, and stirring is performed to obtain the grouting material which can be used for grouting reinforcement portions and defect parts of the tunnel inverted arches. The inorganic grouting material obtained in theinvention is suitable for repairing and stabilizing defects and dangerous rock bodies of tunnel inverted arches at 5-35 DEG C, has the advantages of high fluidity, high bonding strength, no shrinkage, good impermeability and good durability, and is suitable for being promoted and applied.

The invention discloses a concrete anticorrosive rust inhibitor for cast-in-place piles. The concrete anticorrosive rust inhibitor is formed by mixing and stirring the following components by mass: 20-30% of calcium nitrite, 20-30% of silica fume, 30-40% of fly ash, 8-10% of finely ground expansive clinker, 1-1.5% of a powder plasticizer and 0.2-0.8% of an air entraining agent. The concrete anticorrosive rust inhibitor has no significant effect on working performance of concrete under appropriate dosage, improves age strength of the concrete, increases compactness of the concrete by certain self-expansion, forms a dense protective layer on a surface of a reinforcing bar, and effectively improves sulfate corrosion resistance of the concrete and erosion resistance of the reinforcing bar.

The invention discloses a viscosity adjusting admixture for spray construction and a preparation method thereof. The viscosity adjusting admixture is composed of following components in parts by weight: 60 to 90 parts of ultrafine powder, 5 to 10 parts of a rheology modifier, 5 to 10 parts of an aggregate wrapping agent; 0.5 to 1 part of an air entraining agent; 1 to 10 parts of a reinforcing component; and 1 to 10 parts of a setting control component; wherein the ultrafine powder is ultrafine limestone flour with a size of 600 to 1000 meshes, and the aggregate wrapping agent is a nano aggregate wrapping agent. The provided viscosity adjusting admixture can reduce the rebound rate, improves the construction efficiency, enhances the strength of all stages, and obviously improves the qualityof construction engineering that uses motor spraying and concrete spraying. The admixture can be used to adjust the viscosity of a spraying material. The pipe obstruction is inhibited. The construction efficiency is improved. The rebound rate of spraying construction, the strength of materials of all stages, and the bonding strength are all improved.

The invention discloses composite graphene high-strength construction waste cement mortar and a preparation method thereof, the composite graphene high-strength construction waste cement mortar is prepared by mixing construction waste and standard sand as aggregate, using graphene oxide as a modifier, and then adding a polycarboxylate superplasticizer, cement and water. The performance indexes ofthe cement mortar disclosed by the invention meet the requirements that the 28-day standard compressive strength is 57.6 MPa, and the breaking strength is 9.03 MPa (tested according to GB/T17617-1999and JGJ/T70-2009); the mass loss and the strength loss of 150 times of anti-freezing cycles are both less than 5% (according to GB/T50476-2008 test); and the Cl<-> content in the product is 0.0067%, and the IRa is 0.08, and the Ir is 0.15 (tested according to GB6566-2010).

The invention belongs to the technical field of cement additives, in particular to an enhanced composite cement grinding aid. The enhanced composite cement grinding aid is prepared from the following raw materials in parts by weight: 20-30 parts of triethanolamine, 10-20 parts of triisopropanolamine, 8-16 parts of sodium tripolyphosphate, 2-6 parts of alkyl glycoside, 1-6 parts of zinc stearate, 0.6-2.2 parts of sodium sulfosuccinate and 35-55 parts of water. With the adoption of the enhanced composite cement grinding aid, the strength of cement at ages of 1 day, 7 days and 28 days can be significantly improved, and defects in the prior art are overcome.

The invention provides a cement grinding aid for improving a grinding effect and a preparation method of the cement grinding aid. The cement grinding aid is characterized by being prepared from the following components in parts by weight: 53-57 parts of water, 11-12 parts of industrial salt, 1-3 parts of anhydrous sodium sulfate, 1-2 parts of sodium thiosulfate, 1-2 parts of sodium nitrite, 1-2 parts of urea, 1-3 parts of sodium lignin sulfonate, 6-8 parts of triethanolamine, 11-13 parts of composite alkylol amine, 4-5 parts of glycerinum and 1-2 parts of sugar. By adopting the cement grindingaid, the cement dispersibility can be remarkably improved, and the cement grinding effect can be improved.

The invention discloses a preparation method of a cement grinding aid, and the method comprises the following steps of: polymerizing polyamine monomers, unsaturated carboxylic acid esters, diluents, amine polyether and alkylene oxide according to a certain molar ratio under appropriate conditions. The invention provides a grinding aid with simple preparation method, strong structural adjustability, good grinding aid effect and high storage stability.