Coal-ash dry-mixed plastering mortar and preparation method thereof

Abstract

The invention discloses coal-ash dry-mixed plastering mortar and a preparation method thereof. The coal-ash dry-mixed plastering mortar is characterized by comprising the following raw materials in percentage by mass: 10-15% of coal ash, 10-15% of cememt, 60-70% of machine-made sand, 5-10% of dust, 0.5-1.5% of re-dispersible latex powder and 0.1-0.5% of a water-retaining agent, wherein the total mass ratio of the above raw materials reaches 100%. The preparation method comprises the following step: sequentially adding the above raw materials into a mixing machine for sufficient stirring and uniform mixing, so as to obtain the coal-ash dry-mixed plastering mortar. The prepared coal-ash dry-mixed plastering mortar has the strong adhesive force with a wall substrate; being dry powder, the coal-ash dry-mixed plastering mortar can be stored for a long time, is convenient to transport, and is applicable to machine spraying construction; and accordingly, the construction work efficiency can be improved, a new way is opened up for the utilization of solid waste, and the manufacturing cost of dry-mixed mortar can be reduced.

Description

technical field [0001] The invention relates to a fly ash dry-mixed plastering mortar and a preparation method thereof, belonging to the technical fields of solid waste comprehensive utilization and building materials. Background technique [0002] Fly ash and desulfurized gypsum are solid wastes discharged from coal-fired power plants. With the development of the power industry, the discharge of fly ash and desulfurized gypsum from coal-fired power plants has increased year by year. A large amount of fly ash and desulfurized gypsum are not treated and utilized, occupying a large amount of land resources and polluting the soil and the surrounding environment. However, the natural sand is less and less, and the natural sand resources in the areas and rivers that can be excavated are rapidly decreasing year by year, and the natural sand in some areas has been exhausted or nearly exhausted. The quantity and quality of natural sand cannot meet the needs of national infrastructu...

AI Technical Summary

Problems solved by technology

A large amount of fly ash and desulfurized gypsum are not treated and utilized, occupying a large amount of land resources and polluting the soil and surrounding environment