Concrete doped with dolomitic rock powder, and preparation method thereof

Abstract

The invention relates to the technical field of energy-saving and environment-friendly building materials, and particularly discloses a concrete doped with dolomitic rock powder, and a preparation method thereof. The concrete is prepared from, by weight, 150-170 parts of cement, 150-170 parts of water, 30-50 parts of fly ash, 60-90 parts of granulated blast furnace slag powder, 30-50 parts of dolomite powder, 700-900 parts of medium sand, 900-1061 parts of broken stone, and 5-10 parts of a polycarboxylic acid water reducer. The concrete prepared by the invention has excellent mixture performance, mechanical property and durability.

Description

technical field [0001] The application relates to the technical field of energy-saving and environment-friendly building materials, more specifically, it relates to a concrete mixed with dolomite powder and a preparation method thereof. Background technique [0002] Dolomite powder is the high purity of 0.045mm sieve out of 0.045mm sieved residue within 45% in the process of crushing dolomite sandstone aggregate. Dolomite powder is a mine waste and also a good inert auxiliary cementitious material. [0003] Commonly used mineral admixtures such as fly ash and finely ground slag powder, as important cementitious materials in concrete, have been widely used in concrete structures and become indispensable raw materials, forming a huge market demand. With the adjustment of my country's energy structure, the proportion of coal used for thermal power generation and heating is decreasing day by day, and new energy sources such as nuclear power, hydropower, wind energy, and solar e...

AI Technical Summary

Problems solved by technology

However, dolomite powder often encounters the following difficulties in the practical application of concrete preparation: dolomite powder is mixed into concrete alone, which is prone to bleeding on the surface of the concrete, and the fluidity and later mechanical properties of the prepared concrete mixture are lower than those of the mixed concrete. Ordinary concrete with the same amount of cement as fly ash and granulated blast furnace slag powder, which limits the use of dolomite powder in the concrete industry

[0005] Since this kind of mine waste cannot be effectively utilized, it has become a huge problem restricting the healthy development of dry sand production in mines.

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