Method for preparing low-grade rolled concrete by using multiple industrial waste slag

Abstract

This invention relates to a method for preparing low-grade concrete by utilizing industrial-residues, such as: red mud (from sintering process aluminium production), residue from chlorine-alkali process for producing alkali, carbide slag, pyrite cinder, waste slag of titanium oxide and coal ash and the like. The water content of these residues is regulated and they are proportioned, mixed evenly by mechanical agitation and added no binder suchas cement, lime or asphalt to produce this inventive products. This product can be used as basic material under road structure, foundation earth; or for producing low grade concrete, baking-free bricks, building-blocks with the strength being up to 13MPa. Advantages are: simple process, low cost, wide use, high utilization rate of industrial wastes, no secondary pollution.

Description

technical field [0001] The method for preparing low-grade roller compacted concrete by utilizing various industrial waste residues belongs to the field of resource utilization of industrial waste residues. Background technique [0002] According to relevant statistics, industries around the world produce about 2.1 billion tons of solid waste every year. As far as China is concerned, the annual industrial waste reaches more than 600 million tons, and the cumulative accumulation over the years has reached nearly 6 billion tons. Except for a small part of utilization, most of them are in the state of simple stacking and random discharge. It not only occupies a large amount of land and farmland, but also pollutes the surrounding soil, water, air and environmental sanitation, causing potential and long-term harm to humans. The resulting direct economic losses amount to more than 30 billion yuan per year. Therefore, the utilization of industrial waste as a resource has become a...

AI Technical Summary

Problems solved by technology

But, owing to above-mentioned patent and technology one, improve the strength of mixture by adding binding material (cement, asphalt, lime and solidifying agent etc.);

Therefore, due to factors such as high binder cost, low mixture strength, and small waste residue usage, the product has low profit and little space for use, and has certain limitations in environmental pollution control and popularization and application.

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