C30 concrete and preparation method thereof

Abstract

The invention provides C30 concrete. One cubic meter of C30 concrete is prepared from the following raw materials: 304 to 315kg of P.O42.5R cement, 400 to 410kg of river sand, 400 to 410kg of machine-made sand, 200 to 210kg of recycled aggregate with the particle diameter being 5 to 10mm, 785 to 805kg of recycled aggregate with the particle diameter being 10 to 25mm, 82 to 88kg of tap water, 82 to 88kg of concrete stirring station recovery water, 51 to 57kg of S75 stage ore powder, 6.9 to 7.7kg of additives and 1.9 to 2.3kg of retarders; the fall highness of the C30 concrete is 200+ / -20mm. The invention also provides a preparation method of the C30 concrete. In the C30 concrete provided by the invention, the content of the tap water and recovery water is respectively 50 percent; for the mixed recovery water, the ingredients of additives are regulated, so that the fall highness of the C30 concrete is 200+ / -20mm; the quality effect identical to that of the concrete mixed by using pure tap water can be achieved; in addition, 50-percent recovery water is mixed in the C30 concrete; the C30 concrete workability is greatly changed; the use of the tap water is reduced; in addition, the recycled aggregate is obtained through crushing, processing and screening building garbage; the material cost is reduced; meanwhile, the ecological environment is effectively protected.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a C30 concrete and a preparation method thereof. Background technique [0002] With the continuous acceleration of the urbanization process in our country, a large number of people are pouring into the city. While the economy is booming, various problems continue to emerge: road traffic congestion, frequent smog weather, air quality decline, random discharge of waste water, etc., all of which are It is becoming a bottleneck restricting the sustainable development of cities. Among them, waste water refers to the general term of water discharged during residents' activities and runoff rainwater, which includes domestic sewage, industrial waste water, and other useless water such as primary rain tracks flowing into drainage pipes and canals. Wastewater treatment refers to the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce ...

AI Technical Summary

Problems solved by technology

As a concrete production company, how to recycle the construction waste in the renovation of the old city and the waste water from the mixing station in the company's concrete production, reduce construction waste pollution and achieve zero discharge of waste water, and directly use the recycled construction waste and waste water in concrete Production and other construction industries create greater economic benefits for the company while making our ecological environment more environmentally friendly. The inventors of the present invention have found no mention or report after investigation