A kind of preparation method of foamed concrete plate doped with glass micropowder

Abstract

The invention discloses a preparation method for a doped-glass micro powder foam concrete plate, and belongs to the field of concrete. According to the preparation method, portland cement and coal ash are mixed to obtain a mixture I, pretreated toughened glass powder and river sand aggregate are added into the mixture I to obtain a concrete-based slurry, then additives such as hydroxymethyl cellulose are added to be mixed with the slurry to obtain a mixture II, and forming of the mixture II is realized in a grinding tool to obtain the doped-glass micro powder foam concrete plate. According to the plate, waste toughened glass micro powder which is spherical in surface configuration and relatively large in specific surface area is doped in concrete, so that gaps between cement particles and gel products are effectively filled, cement stones and a limiting surface are compact, the concrete porosity rate is greatly reduced, the chloride diffusion resistance and the durability of the concrete are greatly improved, two solid wastes, namely the waste glass and the waste concrete, are utilized comprehensively, and cyclic utilization of municipal wastes and waste concrete resources is facilitated.

Description

technical field [0001] The invention discloses a method for preparing a foam concrete plate doped with glass micropowder, which belongs to the field of concrete. Background technique [0002] Glass is widely used in our daily life and in all walks of life. At the same time, the amount of waste glass is increasing. According to the estimate of the United Nations, 7% of the global solid waste is waste glass. The waste glass produced in my country every year is 10.4 million tons. Accounting for 5% of the total solid waste, only 13% to 15% of waste glass in my country is recycled, and more of it is landfilled as garbage, which also causes pollution to the ecological environment and waste of resources and energy. At the same time, the annual concrete consumption in the world exceeds 4 billion m 3 , the aggregate consumption of sand and gravel exceeds 6-8 billion tons. And our country consumes 1.3 to 1.4 billion m3 of concrete every year 3 , Accounting for 1 / 3 of the global conc...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the current waste glass coarse aggregate doped in concrete, because it has a smooth structure on both sides, it has poor adhesion with the aggregate, resulting in the interior of the concrete being not dense, and chloride ions are easy to penetrate, causing the steel bars in the concrete to corrode To solve the problem, a preparation method of foamed concrete board doped with glass micropowder is provided. The invention mixes Portland cement and fly ash, and adds pretreated tempered glass powder and river sand aggregate to obtain concrete base material. mud, add hydroxymethyl cellulose and other additives to mix, and mold it in an abrasive tool to get a foam concrete plate doped with glass micropowder. This invention uses waste tempered glass micropowder to dope concrete. With a large specific surface area, it can effectively fill the gaps between cement particles and gel products, make the cement stone and the interface dense, greatly reduce the porosity of concrete, and improve the chloride ion diffusion resistance and durability of concrete Greatly improved, and the comprehensive utilization of waste glass and waste concrete two solid wastes is conducive to the recycling of urban waste and waste concrete resources