Calcium-based polymer gel material of multicomponent composite powder and preparation method of calcium-based polymer gel material

Abstract

The invention discloses a calcium-based polymer gel material of multicomponent composite powder and a preparation method of the calcium-based polymer gel material. The calcium-based polymer gel material is prepared by mixing the composite multicomponent powder composed of portland cement, metakaolin, high-calcium fly ash and slag powder, a composite activator composed of liquid sodium silicate andsolid pure sodium hydroxide, and water at a normal temperature, wherein the multicomponent composite powder comprises the following raw materials in parts by weight: 10-30 parts of the portland cement, 20-60 parts of the metakaolin, 15-60 parts of the slag powder and 5-20 parts of the high-calcium fly ash; in the composite activator, the liquid sodium silicate and the solid pure sodium hydroxideaccount for 10-16% of the mass of the composite powder; and the water accounts for 35-45% of the mass of the composite powder. According to the invention, the kaolin, the slag powder and the high-calcium fly ash with wide sources are used as the raw materials, the raw materials are blended with a small amount of the portland cement to obtain the calcium-based polymer gel material, a production process is simple, the energy consumption is low, and energy conservation and environmental protection are achieved; and the obtained calcium-based polymer test piece is compact in surface, high in strength and good in high-temperature resistance and chemical corrosion resistance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a novel environment-friendly multi-component composite powder calcium-based polymer gelling material and a preparation method thereof. Background technique [0002] Since its invention in 1824, Portland cement has been widely used in civil engineering due to its high strength, excellent durability and low production cost, and has become the most widely used cementitious material in the world. The cement production process includes two grinding processes and one burning process. Every ton of cement produced consumes 120 kilograms of coal resources and emits a large amount of carbon dioxide gas and dust. According to statistics, my country's cement output in 2013 was 2.41 billion tons, accounting for 58.6% of the world's total cement, and carbon dioxide emissions exceeded 1.22 billion tons; in addition, with the continuous advancement of industrialization, a large amount of indust...

AI Technical Summary

Problems solved by technology

[0004] Geopolymer cement can be divided into inorganic mineral high polymers and oligomers. Geopolymers made of metakaolin or fly ash are mostly inorganic mineral high polymers with good durability, but the prepared test The strength of the block is low, and it needs to be cured at a higher temperature. The coagulation speed is slow at room temperature and its activity is difficult to stimulate; if the reaction products are mostly inorganic mineral oligomers, although the strength is high, the prepared test block shrinks greatly. , prone to cracks, and poor durability, thus limiting the promotion and application of geopolymers

At present, most studies mainly focus on the alkali excitation of a single raw material, and some studies involve the compounding of slag and metakaolin, metakaolin and fly ash, but for Portland cement, metakaolin, high calcium fly ash, There are few reports on calcium-based polymer cementitious materials prepared by multi-component compounding of slag