Cement-stabilized steel slag gravel pavement base mixture and preparation method thereof

Abstract

The invention relates to the technical field of pavement base materials, in particular to a cement-stabilized steel slag gravel pavement base mixture and a preparation method thereof. The raw materials comprise steel slag, gravel, fibers, a dispersing agent, bentonite and water. The cement-stabilized steel slag gravel pavement base mixture is obtained by reasonably compounding gravel, cement, waste steel slag, bentonite, fibers and a dispersing agent. Compared with the prior art, the water stability, the crack resistance and the seepage resistance of a pavement base structure are greatly improved under the condition that the requirements for the strength and the rigidity of the pavement base structure are met; according to the invention, cracks caused by temperature stress and shrinkage are greatly improved, the erosion resistance, the wear resistance and the durability are greatly improved, the service life of the pavement is prolonged, and the later maintenance and repair cost is greatly reduced; meanwhile, waste steel slag is turned into wealth, and the environmental pollution degree caused by the fact that the steel slag occupies a large amount of land is reduced.

Description

technical field [0001] The invention relates to the technical field of pavement base materials, and relates to a cement-stabilized steel slag gravel pavement base mixture and a preparation method thereof. Background technique [0002] Steel slag is a by-product of the combination of ore, fuel and fusible silicate in flux during the steelmaking process. Its recycling has always been an important part of the sustainable development strategy, and it is also an important research in building materials at home and abroad. one of the directions. In recent years, with the development of my country's economy and the increase of steel output, the output of steel slag has also increased. In 2016, the output of steel slag was about 65 million tons to 120 million tons. In 2017, my country's steel slag discharge was about 80 million tons. In 2018, China's steel output was about 1.1 billion tons, and the steel slag output was about 170 million tons, but its utilization rate was only 22%,...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a cement-stabilized steel slag gravel pavement base mixture and its preparation method, which overcomes the deficiencies of the prior art and can effectively solve the problem of water stability, crack resistance and seepage prevention of the existing semi-rigid base during use Poor performance, easy to produce dry shrinkage and temperature shrinkage cracks, which will cause premature cracking of the asphalt surface layer, resulting in insufficient strength to form diseases such as pumping, subsidence, and edge gnawing, and is also vulnerable to rainwater and groundwater erosion. The back layer will be cracked and damaged , leading to the problem that the road surface cannot reach the design service life, and the later maintenance and repair costs are high