Preparation method of high-performance gas-filling building block composite material

Abstract

The invention discloses a preparation method of a high-performance gas-filling building block composite material, belonging to the technical field of building materials. According to the invention, the coal ash, tailings, slag, yellow sand and the like are used as major raw materials, the cement, carbide slag and lime are used as excitants, the aluminum powder paste and hydrogen peroxide are used as gas production agents, the phosphoric acid and water glass are used as foam stabilizers, the ardealite and titanium gypsum are used as retarders, and the calcium lignosulphonate and hydroxylmethylcellulose are used as dispersing agents. The preparation method is characterized in that the coal ash, the tailings, the slag, the yellow sand and the like are subjected to the technologies of PLC system grinding, mixing, pouring, precuring, cutting, steaming and pressing, building block separation, packing and the like; and the technology for preparing the silicate composite material for a building is adopted. Through the invention, the produced building block has the characteristics of stable chemical property, excellent physical performance and the like. The preparation method has a simple technology and high efficiency, can consume a great quantity of solid wastes, prevents the emission of three wastes and the environmental pollution, reduces the environmental pollution caused by other wastes, and creates obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for preparing a high-performance aerated block composite material by using fly ash or tailings. Background technique [0002] As one of the world's major coal-producing and coal-consuming countries, coal will still be the main energy demanded by various energy industries for a long period of time in the future. Coal resources account for 90% of the total proven primary energy; although the country It has been committed to the in-depth development of clean resources such as hydropower, nuclear power, and wind power, but thermal power still dominates as a traditional model. As the waste residue of industrial power plants, the discharge of fly ash has increased sharply year by year. According to statistics, in 2009, the national discharge of fly ash was nearly 400 million tons, and the cumulative amount of fly ash piled up was more than 5 billion tons. The mass...

AI Technical Summary

Problems solved by technology

At present, the fly ash autoclaved products with solid waste such as fly ash or tailings as the main raw material is one of the top ten demonstration projects for the comprehensive utilization of bulk solid waste specially supported and promoted by the country during the "12th Five-Year Plan" development. 1. However, the current fly ash brick products generally have technical problems such as poor quality, low strength, large shrinkage, high water absorption, easy to crack, and large capacity.