Recycled aggregate concrete

Abstract

The invention provides a recycled aggregate concrete which comprises the following ingredients of cement, recycled aggregate, admixture, water and pumping aid for the concrete determined according toperformances, and the ingredients of the concrete according to the weight percentages of the concrete are respectively 4-20 percent of cement, 0-35 percent of recycled fine aggregate, 0-46 percent ofrecycled rough aggregate, 1-8 percent of admixture, 1.5-2.5 percent of the pumping aid for the concrete based on the weight sum of the cement and the admixture, and the balance of water. The inventionhas the effects that the effective utilization of building wastes is realized so that limited resources can be recycled, and the environment problem is solved. The recycled aggregate concrete is oneof main routes of developing green concretes and realizing the ecologization of building products. The concrete can reduce the pollution to the environment from building wastes, decrease the production volume and the production energy consumption of natural ore materials, accord with the requirements of saving resources and energy and not damaging the environment of the world environment organization, is more beneficial for sustainable development, not only can satisfy requirements of the contemporary people, but also does not damage the capacity of satisfying unborn requirements.

Description

technical field [0001] The invention relates to a concrete, in particular to a recycled aggregate concrete which uses construction waste as concrete aggregate after cleaning, crushing and screening to partially or completely replace the natural aggregate. Background technique [0002] At present, ordinary concrete aggregates are mainly natural sand and gravel, which are non-renewable resources. Mechanical mining not only destroys the natural ecological environment, but also causes environmental pollution. With the acceleration of our country's infrastructure construction, the construction industry has entered a stage of rapid development, and the demand for concrete market is increasing. As a result, the mining of natural sand and gravel mines is also increasing. Natural aggregate resources will also tend to be exhausted, and the damage to the ecological environment will also increase. Very serious. The stacking of construction waste generated by house demolition has also c...

AI Technical Summary

Problems solved by technology

[0002] At present, ordinary concrete aggregates are mainly natural sand and gravel, which are non-renewable resources