Ultrahigh-performance concrete doped with steel residues and preparation method of ultrahigh-performance concrete

Abstract

The invention discloses ultrahigh-performance concrete doped with steel residues and a preparation method of the ultrahigh-performance concrete. The content of each raw material in every stere of ultrahigh-performance concrete is as follows: 372.1-620.2 kg of cement, 62.0-248.1 kg of steel residues, 141.3-196.3 kg of coal ash, 87.8-131.8 kg of silica fume, 198.4-297.6 kg of quartz sand I, 793.6-1190.4 kg of quartz sand II, 78.5-235.5 kg of steel fibers, 127.8-153 kg of water and 27-45 kg of water reducing agent. The doping amount of the steel residues is large and can reach 30% of the mass ofthe cement, and 186 kg of steel residues can be doped into every stere of ultrahigh-performance concrete; and meanwhile, the ultrahigh-performance concrete is high in strength, after the cement with the mass percentage of 30% is replaced with the steel residues, the seven-day strength can reach 130 MPa, and the fourteen-day strength can exceed 150 MPa.

Description

technical field [0001] The invention belongs to the technical field of materials and specifically designs an ultra-high performance concrete mixed with steel slag and a preparation method thereof. Background technique [0002] According to statistics, my country's steel production accounts for 1 / 5 of the world's steel industry. Steel slag is the waste slag produced in the steelmaking process, and its discharge is about 15% of steel production. The annual discharge of steel slag in my country is huge; The situation is not ideal. Many steel slags are treated extensively: about 4.5 million tons are used for road construction and engineering backfill, 1.2 million tons are used for sintering, and only about 500,000 tons are used for cement or other construction materials. According to resource and effectiveness evaluation, the actual utilization rate of steel slag in my country is only about 40%. 65% of steel slag in Europe has been effectively utilized, and the discharge and util...

AI Technical Summary

Problems solved by technology

A large amount of steel slag has been piled up and put on hold in my country. At present, the accumulated steel slag has reached more than 300 million tons, occupying cultivated land and causing serious water and soil pollution.

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