Material for promoting formation of geopolymer in high-humidity environment and preparation method thereof

Abstract

The invention discloses a material for promoting formation of a geopolymer in a high-humidity environment and a preparation method of the material. The raw materials comprise solid waste, an exciting agent, an additive and water, the solid wastes are industrial solid wastes and comprise fly ash and phosphorus tailing sand; the exciting agent is an alkaline exciting agent and is one of a sodium hydroxide exciting agent, a sodium hydroxide-silica fume composite exciting agent and a water glass exciting agent; the additive is xanthan gum, and the addition amount of the additive is 1% of the solid waste; and the mass ratio (water-solid ratio) of the water to the solid waste is 0.5-0.75. According to the method, the feasibility of preparing a geopolymer grouting filling material from the solid wastes is improved, the problem that the goaf grouting filling material is difficult to form in the actual grouting process is solved, the forming degree of the geopolymer in the high-humidity environment is improved, the final setting time is shortened, the industrial solid wastes can be consumed, and meanwhile, goaf repair treatment is carried out. The raw materials are industrial solid wastes and are low in price and wide in source.

Description

technical field [0001] The invention relates to the technical field of geopolymer preparation and application, in particular to a material for promoting the formation of geopolymers in a high-humidity environment and a preparation method thereof. Background technique [0002] Geopolymer refers to a three-dimensional network polymeric gelling material composed of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron formed by polycondensation of minerals under high alkaline conditions using natural minerals or solid waste and artificial silicon-aluminum compounds as raw materials. . Compared with Portland cement, geopolymers have the advantages of rich sources of raw materials, simple preparation process, low production energy consumption and "three wastes" emissions, high strength, good durability, easy access to raw materials, and low cost. Therefore, in recent years, relevant scholars at home and abroad have carried out a series of research on the use of geopolymers ...

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Problems solved by technology

[0003] However, in the process of practical application, it is found that the environment of the goaf is relatively special, there is a large amount of old empty water, the overall humidity of the gob is relatively high, and the temperature is low

Therefore, in the actual test process, it is found that the geopolymer grouting materials have poor molding problems in the low temperature and high humidity environment. After the test block is cured in the curing box under simulated conditions (25 ° C, 98 ± 1% humidity) for 28 days Still kind of soft and not dry

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