Steel slag coal ash self-cementing material

Abstract

The present invention belongs to a building material, in particular to a self-concretion material of steel residue powder and coal ash. The self-concretion material of steel residue powder and coal ash is characterized in that: the material is made of the mixing with steel residue, coal ash powder, industrial waste gypsum and alkaline catalyzer; the molar of the industrial waste gypsum is 1-15 percent of the total molar of the steel residue, coal ash powder, industrial waste gypsum and alkaline catalyzer; the molar of the alkaline catalyzer is 0-3 percent of the total molar of the steel residue, coal ash powder, industrial waste gypsum and alkaline catalyzer; the molar ratio between the steel residue and the coal ash powder is 1: 2-4: 1. (The material can not only be used alone, but also be used for stabilizing the road base of detritus and grit and the building brick.) The material is characterized in low cost.

Description

technical field [0001] The invention belongs to building materials, in particular to a steel slag fly ash self-consolidating material. Background technique [0002] The production of steel slag, fly ash, and industrial waste gypsum in my country is large, the comprehensive utilization rate is low, and the economic benefits and technical content of comprehensive utilization are low. Research and development of industrial waste slag comprehensive utilization methods with large slag consumption and high technical and economic indicators It has important economic and environmental benefits. Steel slag is a waste slag generated in large quantities by extracting impurities with slagging agents such as lime or fluorite in the steelmaking industry. High-alkalinity steel slag contains C 2 S, C 3 S, C 4 A and other hydraulic minerals and silicon, aluminum vitreous body, so it has good hydraulic and potential hydraulic. Because steel slag contains a large amount of f-CaO and a certa...

AI Technical Summary

Problems solved by technology

Because steel slag contains a large amount of f-CaO and a certain amount of Fe, its stability and wearability are poor, which greatly affects the comprehensive utilization of steel slag

Although there are many studies on the application of steel slag in cement production, the actual utilization rate is still less than 10%. At present, steel slag is widely used in filling projects, and the research on using cement, lime or lime fly ash to stabilize steel slag as pavement base material is in the domestic market. However, these studies have not fully utilized the hydraulic activity of steel slag itself, and all need to be mixed with a certain amount of cement or lime and other cementitious materials.