5results about How to "Promotes hydration process" patented technology

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 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.

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.