High-strength recycled concrete

Abstract

The invention discloses a high-strength recycled concrete. The high-strength recycled concrete is composed of, by weight, 200 to 330 parts of cement, 80 to 90 parts of ore powder, 640 to 950 parts of recycled sand, 350 to 400 parts of recycled aggregate, 70 to 80 parts of a gel material, 5 to 12 parts of a pumping aid, and 170 to 200 parts of water. Most of the above raw materials, except recycled aggregate, are recycled, so that environment protection and resource recycling are realized further. No toxic or harmful material is added; no harm is caused on human body or the environment; the strength of the obtained high-strength recycled concrete is capable of reaching C50 standard; the performance of the high-strength recycled concrete is stable; stable control of the performance of the high-strength recycled concrete can be realized via controlling the amount of cement, recycled sand, and recycled aggregate; application value is high; a preparation method is low in cost, and is capable of satisfying economic and environment protection requirements; excellent economic benefit and social benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of concrete material preparation, and in particular relates to high-strength recycled concrete. Background technique [0002] According to relevant statistics, in 2001, about 35% of waste concrete was discharged in structural engineering in my country, and the rest was asphalt concrete and other wastes. According to rough statistics, in my country alone, the waste from demolition of old buildings reaches more than 40 million tons every year, of which the amount of disintegrated old concrete is about 13.6 million tons. The amount of waste concrete discharged is as high as 4.8 million tons; based on an average of more than 30 mixing stations in a city, more than 4 million cubic meters of concrete are mixed every year, and about 100,000 tons of waste concrete are discharged; with the transformation of the old city With the development of economic construction, it is estimated that the amount of waste concrete wi...

AI Technical Summary

Problems solved by technology

However, it is difficult to control the hardness and other properties of the recycled concrete produced by this method, which leads to the limitation of its application range. In actual use, the performance of the final produced concrete has to be underestimated, so as to ensure that the use of the concrete will not cause safety problems. , which also results in the waste of other raw materials to a large extent

Therefore, the method for preparing recycled concrete proposed by this invention only provides a theoretically more effective method in improving the autogenous shrinkage of concrete, and there are still many deficiencies in other aspects, so it is difficult to put it into practical application.