Composite blending material of slag powder and use method

Abstract

The invention relates to a composite blending material of slag power and a use method. Slag, quick lime and calcined gypsum are mixed according to a certain proportion, and then, are finely ground into the composite blending material with specific surface area of 400m<2> / kg to 600m<2> / kg. When the composite blending material is used for producing cement concrete products with a steam curing process, the composite blending material can replace 10-40% of cement with the strength grade above 32.5 in an equal quantity manner; and by using the composite blending material, the production cost of the cement concrete products is lowered, resources are saved, and favorable economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to a method for making and using a concrete admixture. Background technique [0002] In the prior art, the cementitious materials used in the production of cement concrete products are Portland cement or ordinary Portland cement or composite Portland cement with a strength grade above 32.5. Invention patents ZL 95116762.6, ZL 03112836.X, ZL 03113366.5, In ZL 03113256.1, it is proposed to add one or two kinds of materials such as ground construction sand, ground slag, ground steel slag, and ground high silica sand to compound and make concrete admixtures after grinding. application, but the three components of slag powder, quicklime and calcined gypsum are prepared in a certain proportion and ground to a certain fineness to develop a slag powder composite admixture, and replace part of the silicon with a certain proportion and equivalent amount under steam curing conditions There is no report on the technology of producing cement ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the cementitious materials used in the production of cement concrete products are Portland cement or ordinary Portland cement or composite Portland cement with a strength grade above 32.5. Invention patents ZL 95116762.6, ZL 03112836.X, ZL 03113366.5, In ZL 03113256.1, it is proposed to add one or two kinds of materials such as ground construction sand, ground slag, ground steel slag, and ground high silica sand to compound and make concrete admixtures after grinding. application, but the three components of slag powder, quicklime and calcined gypsum are prepared in a certain proportion and ground to a certain fineness to develop a slag powder composite admixture, and replace part of the silicon with a certain proportion and equivalent amount under steam curing conditions There is no report on the technology of producing cement concrete products with salt cement or ordinary Portland cement or composite Portland cement