Multifunctional concrete acid-resistant powder

Abstract

The invention relates to multifunctional concrete acid-resistant powder which is prepared from the following components in percentage by weight: 10%-15% of a calcium sulphoaluminate expanding agent, 20%-35% of fly ash, 50%-60% of blast furnace mineral powder, 2%-4% of instant powdery sodium silicate and 0.5%-1.5% of polypropylene fibers. The multifunctional concrete acid-resistant powder significantly improves the chemical composition of a concrete cementing system, reduces the reaction between acidic substances and a concrete matrix, improves the penetration resistance and crack resistance ofthe matrix, reduces the acidic substances from entering the concrete matrix, improves the acid corrosion resistance of the hydraulic concrete, and reduces the risks of surface swelling and strength reduction of the concrete under an acidic environment erosion condition. The material has the characteristics of convenience in use, complete nontoxicity and the like, is suitable for large-scale popularization and application, and has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a multifunctional concrete acid-resistant powder. Background technique [0002] With the continuous acceleration of my country's industrialization process, environmental problems have become increasingly prominent, and a series of pollution caused by this has made concrete face many threats, the most serious of which is acid corrosion. Acid corrosion will cause rapid deterioration of concrete properties, and the resulting structural aging and economic losses have become more and more serious problems. The common acid corrosion mainly exists in the sewage discharged from metallurgical enterprises and landfills, etc., and its acidity is relatively strong. According to statistics, the economic loss due to material damage in industrially developed countries generally accounts for 1% to 4% of the total output value of the national economy, which reflects the severity and h...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a multi-functional concrete acid-resistant powder, which has anti-acid Acid erosion, anti-seepage, anti-cracking functions, and has the characteristics of easy construction and low cost

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