Load-bearing heat-preserving concrete utilizing wastes as coarse and fine aggregates and preparation method of load-bearing heat-preserving concrete

Abstract

The invention relates to the technical field of concrete materials and particularly discloses load-bearing heat-preserving concrete utilizing wastes as coarse and fine aggregates and a preparation method of the load-bearing heat-preserving concrete. The load-bearing heat-preserving concrete utilizing the wastes as the coarse and fine aggregates comprises the following components in parts by weight: 8-15 parts of water, 16-28 parts of cement, 2-5 parts of fly ash, 18-26 parts of tailing waste sand, 4.6-6.5 parts of glazed hollow beads, 45-57 parts of high-titanium heavy slag, 0.26-0.33 part ofa water reducing agent. The load-bearing heat-preserving concrete disclosed by the invention utilizes the high-titanium heavy slag as the coarse aggregates and the tailing waste sand as the fine aggregates and solves the problems of land resource waste and environmental pollution caused as a large amount of slag and tailing waste sand occupy a large amount of land; the thermal conductivity coefficient of the prepared load-bearing heat-preserving concrete is 0.09-0.22 W/(m*K), so that the heat-preserving and energy-saving performance of a wall body are greatly improved.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a load-bearing and heat-retaining concrete using waste as coarse and fine aggregates and a preparation method thereof. Background technique [0002] my country's steel production capacity has been among the top in the world for many years in a row, while most of the iron tailings waste sand and gravel produced in steelmaking and ironmaking are directly abandoned and piled up. At present, it has exceeded 10 billion tons, and its recovery rate is only about 14%. Caused a lot of waste of resources. A large number of tailings will not only occupy valuable land resources, but also the chemical reagents added to the tailings for screening minerals will also cause serious pollution to the natural environment. Therefore, the problem of recycling iron tailings sand also needs to be solved urgently. Therefore, if the tailings can be effectively used, not only can the land occupa...

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Problems solved by technology

[0005] Aiming at the problems of reutilization of tailings waste sand and gravel produced in existing iron and steel refining, treatment of high-titanium heavy slag, poor thermal insulation performance of traditional concrete materials, and energy waste caused by adding thermal insulation layer, the present invention provides a Load-bearing and thermal insulation concrete made of coarse and fine aggregates

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