Resource utilization type steel-slag concrete

Abstract

The invention discloses a resource utilization type steel-slag concrete. The resource utilization type steel-slag concrete is characterized in that the volume weight is 2400 -2600kg / m3, and the raw material components and the weight part of each component based on the mass percentage of cement are as follows: 1.000 parts of cement, 0.300-0.350 parts of mineral powder, 0.350-0.400 parts of coal ash, 0.100-0.150 parts of steel-slag fine powder, 1.300-1.650 parts of steel-slag fine aggregate, 1.400-1.900 parts of steel-slag rough aggregate, 2.000-2.200 parts of sand, 3.200-3.450 parts of broken stone, 0.700-0.900 parts of water, and 0.015-0.025 parts of additive. In comparison with the normal concrete, the resource utilization type steel-slag concrete provided by the invention has the advantages that the total content of solid wastes such as steel-slag and coal ash is higher than 30%; with the adoption of the industrial solid slag, the additional value is enhanced, the production cost is reduced, and meanwhile, the environmental problem is solved; the prepared concrete has good compactness and excellent mechanical property.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a steel slag concrete for resource utilization, which is a concrete mixed with steel slag fine powder, steel slag fine aggregate with a particle size of 0-5 mm and steel slag coarse aggregate with a particle size of 5-25 mm . Background technique [0002] The Twelfth Five-Year Plan requires vigorously promoting the development of circular economy and improving the utilization rate of bulk industrial solid waste such as steel slag. Steel slag is solid waste slag in the steelmaking process, and its discharge per ton of steel reaches 0.15-0.20 tons. my country's steel output ranks first in the world. After decades of exploration, my country has formed its own characteristics in steel slag treatment and utilization technology. Steel slag has been successfully used in sintering ingredients, cement production, engineering backfill materials, road subgrade materials, etc. [0003] Ho...

AI Technical Summary

Problems solved by technology

[0003] However, due to the difference in smelting process and steel slag treatment process, the composition of steel slag is complex and fluctuates greatly, especially the stability of converter steel slag restricts the effective utilization of steel slag

The application of steel slag micropowder to concrete is relatively extensive, but the application of steel slag fine aggregate and steel slag coarse aggregate to concrete, especially the application of steel slag coarse aggregate with large particle size to concrete, is currently seldom studied.

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