Green expansive cementing material based on salt chemical industry solid waste and building garbage, preparation method and applications thereof

Abstract

The present invention discloses a green expansive cementing material based on salt chemical industry solid waste and building garbage, and a preparation method thereof, wherein salt-containing chemical industry waste (salt mud, carbide slag and mirabilite), building garbage (gravel, broken bricks and concrete blocks), steelmaking plant waste residue (water residue and steel residue) and power plant desulfuration gypsum are matched with an expander, a water reducer, a soluble calcium salt and other components, and fine grinding and uniform mixing are performed to prepare the green expansive cementing material. According to the present invention, the salt mud, the carbide slag, the mirabilite and other solid waste produced by the salt chemical industry enterprise are digested while the building garbage, the desulfuration gypsum, the water residue and other solid water are subjected to the resource utilization, such that the green expansive cementing material is the green environmental protection cementing material; and the green expansive cementing material has characteristics of good expansion property, good fluidity, good consolidation property, good early strength, active tightening and effective earth's surface sinking control, is the cementing material for mine, and is particularly suitable for the filling mining of coal mines or non-coal mines.

Description

technical field [0001] The invention relates to the field of resource utilization of salt chemical waste, construction waste and mine filling cementing material, in particular to a green expansive cementing material based on industrial waste. Background technique [0002] The solid waste produced by salt chemical enterprises, such as salt mud, calcium carbide slag, and thenardite, has complex recycling processes and poor economic benefits, resulting in a large amount of solid waste accumulated and left idle. On the one hand, the stacking of solid waste occupies a large amount of land resources, on the other hand, it seriously pollutes the soil, water bodies and the atmosphere, and destroys the local ecological environment. Therefore, how to realize the recycling of solid waste such as salt mud, carbide slag and Glauber's salt is an urgent problem for salt chemical enterprises. [0003] At the same time, with the continuous acceleration of my country's urbanization process, ...

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Problems solved by technology

[0006] In order to realize the resource reuse of salt chemical solid waste (calcium carbide slag, salt mud, Glauber’s salt) and construction waste (gravel, broken brick, concrete block), solve the problems of poor topping performance and high production cost of existing mine filling materials , the present invention creatively proposes a green expansive gelling material based on salt chemical solid waste and construction waste. The green expansive gelling material has good expansion, fluidity, consolidation and early strength, and can actively top, effectively control surface subsidence, while realizing the resource utilization of salt chemical solid waste (carbide slag, salt mud, Glauber's salt) and construction waste (gravel, broken brick, concrete block), etc., overcome the mine filling in the existing technology Poor topping of materials, high production costs and other technical problems, have high economic benefits and social significance

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