17results about How to "Promotes hydration process" patented technology

The invention relates to the technical field of building materials, and provides a preparation method of a functional fiber modifier, the modifier and application of the modifier in precast concrete.The method comprises the steps that S1, a calcium raw material is added into water to be stirred and mixed, sealed standing and aging are conducted for 20-48 h, a mixed solution is obtained, and the temperature of the water is controlled to range from 80 DEG C to 100 DEG C; s2, adding a siliceous raw material and a structure-directing agent into the mixed solution, uniformly mixing, and adding into a reaction kettle; s3, the temperature of the reaction kettle is controlled to rise, meanwhile, the stirring rotating speed is controlled to be 200-400 rpm, when the temperature rises to 180-220 DEG C, the stirring rotating speed is controlled to be 50-70 rpm, and heat preservation is conducted for a reaction; s4, after the reaction is finished, cooling, taking out slurry, filtering and drying to obtain functional fibers; and S5, dispersing the reinforcing agent in water, adding the functional fibers, and stirring for reaction to obtain the functional fiber modifier. According to the technical scheme of the invention, the functional fiber modifier has obvious rapid hardening and early strength effects, has no adverse effect on concrete performance, and can realize energy saving and steam curing-free and rapid demolding to improve the template turnover rate.

The invention provides a blasting hole sealing waterproof material with a low reaction temperature and a rapid solidification function, and belongs to the technical field of hole sealing materials. The blasting hole sealing waterproof material comprises a component A and a component B, the component A is prepared from magnesium oxide, metakaolin, calcium fluotitanate, lithium carbonate, nano zirconium oxide and water; the component B is prepared from monopotassium phosphate, borax, lithium phosphate, superfine calcium carbonate and polytetrafluoroethylene particles. The two components are mixed according to the volume ratio of 1: 1. The material can be rapidly solidified at a low reaction temperature, the compression resistance and the impermeability are remarkably improved, the material is suitable for occasions such as underground engineering, tunneling and coal mine excavation, and the problem that the performance of an existing hole sealing material is reduced under moisture permeation is solved. In addition, the adopted preparation method is simple and easy to implement, and the excellence and the application effect of the material are ensured.

The invention discloses modified sludge incineration ash and application thereof. The modified sludge incineration ash comprises the steps of alkali liquor dipping, centrifuging or filtering, drying, exciting agent adding and mortar utilization. According to the method, the adverse effect of phosphorus in the sludge incineration ash on the cement hydration reaction is avoided, the activity of the sludge incineration ash is improved, meanwhile, the mixing amount of the sludge incineration ash in mortar is increased, a way is provided for large-mixing-amount application of the sludge incineration ash in building materials, and the method has a wide application prospect.

The invention discloses an application of an anti-corrosion and anti-seepage agent in a phosphate radical and fluorine ion environment, which is characterized in that the anti-corrosion and anti-seepage agent is added into concrete according to 0.5-3% of a cementing material to prepare a required structure for resisting corrosion of phosphate radicals and fluorine ions. A concrete test piece added with the anti-corrosion and anti-seepage agent is in a phosphorus-fluorine acid environment for a long time, the compressive strength of the concrete test piece is still in an enhanced trend, the addition of the anti-corrosion and anti-seepage agent has the effect of resisting corrosion of phosphate radical and fluorine ion environment acid wastewater, and a concrete structure can still be very stable even in a strong acid environment; the high efficiency can provide a feasible solution for prolonging the service life of highly acidic environment structures such as ardealite storehouses and the like.

The invention discloses an additive for adjusting the setting time of a high-calcium-based material of an alkali-activated circulating fluidized bed, and belongs to the technical field of solid waste recycling and building materials. The additive is prepared from the following raw materials in parts by mass: 300 to 400 parts of allyl polyoxyethylene ether, 50 to 250 parts of acrylic acid, 4 to 20 parts of sodium methacrylate sulfonate, 10 to 30 parts of chain initiator, 2 to 8 parts of chain transfer agent and 600 to 800 parts of water. By scientifically regulating and controlling the raw material composition of the additive for regulating the coagulation time of the alkali-activated circulating fluidized bed high-calcium-based material, the coagulation time of the circulating fluidized bed high-calcium-based material is effectively regulated, and a technical guarantee is provided for industrial application of circulating fluidized bed high-calcium ash.

This invention relates to an ultra-high performance concrete with added supersulfate cement and its preparation method, belonging to the field of concrete technology. This invention uses granulated blast furnace slag powder, desulfurized gypsum, and cement clinker as the supersulfate cement matrix, and introduces pre-carbonized dicalcium γ-silicate, CO2 nanobubble water, and triethanolamine as ternary synergistic components. The finished product is obtained through early sealed in-situ carbonization-hydration synergistic curing supplemented by standard curing. Pre-carbonized dicalcium γ-silicate provides heterogeneous nucleation sites to accelerate early hydration; CO2 nanobubbles achieve in-situ carbonization filling submicron pores; triethanolamine simultaneously enhances the carbonization and hydration reaction rates; and sealed curing protects hydration products from decalcification. Through multi-level synergistic effects, this invention significantly improves the early strength, compressive strength, and carbonation resistance of concrete. The concrete prepared by this invention exhibits carbonation resistance, high compressive strength, and excellent early strength.

The invention discloses a low-carbon concrete nano C-A-S-H seed crystal enhancer as well as a preparation method and application thereof. The reinforcing agent comprises the following raw materials in parts by weight: 150-200 parts of water, 20-25 parts of sodium silicate nonahydrate, 15-20 parts of calcium nitrate tetrahydrate, 5-8 parts of aluminum nitrate nonahydrate, 1-4 parts of a polycarboxylate superplasticizer, 1-4 parts of sodium hydroxide, 0.5-2 parts of a silane coupling agent and 0.5-2 parts of a sodium polyacrylate dispersing agent. The preparation method comprises the steps of dissolution, precipitation reaction, dispersion modification and pH adjustment. According to the invention, by optimizing the molar ratio of silicon to aluminum and constructing a composite dispersion system, the technical problems of easy agglomeration, poor stability and poor compatibility with a water reducing agent of the nano seed crystal are solved. When 0.5-2% of the additive is applied to concrete, the early strength can be remarkably improved, the workability maintenance can be improved, the activity of solid wastes such as fly ash and the like can be effectively excited, and a key technical support is provided for preparing high-performance low-carbon concrete.

The application relates to the technical field of solid waste treatment and building materials, and discloses a modified sludge solidifying agent and a preparation method thereof, the solidifying agent contains modified aggregates 15-28 parts, a composite cementing agent 55-70 parts, an efficient water absorption modifier 6-12 parts, an organic polymer modifier 2-5 parts and early strength additives 1-3 parts in terms of weight fractions, and the components are mixed through proportioning and a segmented preparation process. The modified aggregates construct a framework support, the composite cementing agent provides hydration cementing action, the efficient water absorption modifier realizes rapid dehydration and heavy metal adsorption, the organic polymer modifier optimizes interface combination, and the early strength additives improve early strength. The application takes industrial solid waste as a main raw material, has high solid waste utilization rate, is low-carbon and environment-friendly, can quickly reduce the water content of sludge, significantly improves the mechanical properties and durability of a solidified body, effectively stabilizes heavy metals, and has a wide application prospect.

The invention discloses a preparation method of a heavy metal contaminated soil stabilizing agent, the heavy metal contaminated soil stabilizing agent and application of the heavy metal contaminated soil stabilizing agent, and relates to the technical field of solid waste treatment.The preparation method of the heavy metal contaminated soil stabilizing agent comprises the following steps that cereal straw is subjected to alkaline modification, and modified cereal straw is obtained; mixing the modified cereal straw with ardealite, and performing heat treatment to obtain a first mixture; the first mixture and blast furnace slag powder are mixed and smashed, and a second mixture is obtained; and mixing the second mixture with industrial alkaline residues to obtain the heavy metal polluted soil stabilizing agent. The raw materials used in the invention are all solid waste materials and are green and environment-friendly, and the prepared heavy metal polluted soil stabilizing agent can adsorb and complex heavy metals in the heavy metal polluted soil through hydration products formed by hydration of the agent, so that the heavy metals are fixed, and the migration of pollutants is effectively inhibited.

The invention relates to the field of concrete preparation, in particular to concrete containing sandy slate aggregate and a preparation method of the concrete. The sandy slate aggregate is prepared from the following components in parts by weight: 75 to 100 parts of ordinary Portland cement, 20 to 40 parts of fly ash, 1280 to 1380 parts of sandy slate low-strength aggregate, 300 to 500 parts of medium-strength aggregate, 0.5 to 1.0 part of carboxymethyl hydroxyethyl cellulose, 5 to 10 parts of fine ground gypsum powder, 0.8 to 1.2 parts of polycarboxylate superplasticizer, 0.1 to 0.2 part of air entraining agent and 70 to 110 parts of water. Wherein the granularity index B1 of the sandy slate low-strength aggregate is controlled to be 2.5-2.8, and the shape index S1 of the sandy slate low-strength aggregate is larger than or equal to 0.70. According to the invention, the void ratio is reduced by optimizing the aggregate gradation and the grain shape, and the water consumption and the cementing material consumption are obviously reduced on the premise of ensuring the workability and the strength.

The application relates to a full-solid-waste high-activity composite admixture and a preparation method thereof, raw materials of the full-solid-waste high-activity composite admixture comprising: mixed-milling micro-powder of steel slag tailings and refining slag, and slag micro-powder; wherein the content of the mixed-milling micro-powder is 20-30 parts by weight, and the content of the slag micro-powder is 70-80 parts by weight. Through the synergistic effect of the raw material re-mixing, the activity of the admixture is improved, the stability of the chemical performance index of the admixture is ensured, the use proportion of the admixture in cement and mortar is improved, the consumption of cement is saved, and then the cost is reduced. The metallurgical industrial solid waste such as steel slag tailings, refining slag, blast furnace slag and the like is realized to be resourcefully utilized, and the problem that long-term stacking occupies land and cannot be absorbed is solved.

The invention relates to novel cement prepared by recycling waste residues and a preparation method thereof, and relates to the technical field of waste residue recycling, the novel cement comprises the following components by mass: 30-50 parts of composite modified waste residues, 3-5 parts of modified polyvinyl alcohol fiber, 30-50 parts of cement clinker, and 0.5-1.5 parts of a water reducer; the composite modified waste residue is prepared from the following raw materials: composite waste residue, an ion-doped mineralizer and a composite excitant. The preparation method comprises the following steps: mixing the composite modified waste residue and the water reducing agent, stirring, adding the cement clinker, carrying out dry mixing, adding the modified polyvinyl alcohol fiber, and stirring to obtain the novel cement prepared by recovering the waste residue. The cement has the effect of improving the early strength performance of the novel cement prepared by recycling the waste residues, and the cement has good compressive strength and stability.

The invention provides a modified cement-based polyphenyl composite thermal insulation material and a preparation method thereof, relates to the technical field of composite materials, and is used for solving the problems that an existing thermal insulation material is easy to burn and insufficient in thermal insulation property and mechanical property. The modified cement-based polyphenyl composite thermal insulation material is prepared from 144-180 parts of cement, 9-36 parts of chromic oxide, 12-20 parts of a water reducing agent, 100-130 parts of water and 10-30 parts of expanded polystyrene, and has the characteristics of difficulty in combustion, low heat conductivity coefficient and high mechanical strength.

The invention discloses coal gangue lightweight aggregate self-curing lightweight concrete and a preparation method thereof, and belongs to the technical field of concrete.The lightweight concrete is prepared from, by mass, 20%-25% of cement, 0-5% of mineral powder, 5%-10% of fly ash, 25%-40% of coal gangue pottery sand, 20%-40% of coal gangue ceramsite, 0.5%-2% of a water reducing agent and 10%-20% of water; the coal gangue ceramsite is compounded with cross-linked sodium hyaluronate. The coal gangue ceramsite is combined with the coal gangue pottery sand, so that the weight of the concrete can be greatly reduced, the coal gangue ceramsite composite cross-linked sodium hyaluronate with a loose and porous structure has excellent water absorption, and the water retaining and releasing capability of the coal gangue ceramsite composite cross-linked sodium hyaluronate can help to release water outwards when the internal humidity of the concrete is reduced, so that a self-curing effect is realized. And the coal gangue ceramsite compounded with the cross-linked sodium hyaluronate is firmly combined with the cementing material, so that the compressive strength is improved, and the light high-strength self-curing concrete material is obtained.

This invention provides a fireproof and insulated door core and its filling process. The core is obtained by filling a door frame with a wet core material, followed by compression molding and curing. The wet core material, by weight, comprises: 4-12 parts closed-cell expanded perlite, 6-18 parts active magnesium oxide, 10-30 parts a 25%-35% (calculated as anhydrous magnesium sulfate) magnesium sulfate aqueous solution, 0.1-0.3 parts a modifier, 0.3-1.2 parts biomimetic interface hybrid modified reinforcing fibers, and 0.1-0.3 parts calcium stearate. The fireproof and insulated door core provided by this invention has low density and good thermal insulation performance, high matrix strength, density, and high-temperature stability, good flexural and impact resistance, low water absorption, good moisture resistance, and excellent overall fireproof and thermal insulation performance.

The invention discloses high-wear-resistance anhydrous phosphogypsum-based self-leveling thermal insulation mortar which is prepared from the following components in parts by weight: 70 to 80 parts of anhydrous phosphogypsum, 5 to 10 parts of semi-hydrated phosphogypsum, 4 to 6 parts of thermal insulation filler, 0.5 to 1.5 parts of modified glass fiber, 2 to 4 parts of composite wear-resistant material, 1 to 2 parts of redispersible latex powder, 0.1 to 0.3 part of sodium polyacrylate, 8 to 12 parts of river sand and 0.5 to 0.7 part of calcium chloride. 0.2 to 0.4 part of a water reducing agent, 0.05 to 0.15 part of a retarder and 30 to 40 parts of water; according to the high-wear-resistance anhydrous phosphogypsum-based self-leveling thermal insulation mortar and the preparation method thereof, the problems that the anhydrous phosphogypsum is low in hydration activity and slow in setting and hardening and semi-hydrated gypsum faces impurity influences are solved, and resource utilization of the anhydrous phosphogypsum is achieved in the field of self-leveling thermal insulation mortar; meanwhile, excellent wear resistance and heat preservation performance are achieved.

This invention relates to the field of admixtures for roller-compacted concrete (RCC), and particularly to a polycarboxylate composite water-reducing agent for RCC and its preparation method. The agent is prepared by copolymerization of the following raw materials in parts by weight: 30-50 parts polyether macromonomer, 1-20 parts modified hydrophobic unsaturated monomer C, and 1-30 parts unsaturated carboxylic acid. The modified hydrophobic unsaturated monomer C is prepared from unsaturated hydrophobic carboxylic acid ester monomers, emulsifiers, solubilizers, and water, with the mass ratio of the unsaturated hydrophobic carboxylic acid ester monomers, the emulsifier, the solubilizer, and the water being (3.0-5.5):(0.5-1.0):(0.5-1.5):(2.5-3.5). Through the aforementioned progressive and synergistic mechanism, this invention systematically solves multiple technical challenges related to water retention, construction adaptability, and long-term durability while ensuring a high water reduction rate for RCC, achieving comprehensive optimization of overall performance.