Abstract
Long-term anti-skid performance plays a vital role on the road life cycle and driving safety. Therefore, the CVS was proposed, which can perform full-size polishing on the rutting slabs. The CVS system was used to simulate the long-term anti-skid attenuation law of five kinds of asphalt mixture with different BOF steel slag contents, and the influence of different BOF steel slag contents on the road anti-skid performance was comprehensively analyzed by using pendulum friction value. With the increase of BOF steel slag volume, the long-term anti-skid performance of asphalt mixture increases first and then decreases. Especially, the asphalt mixture with 50% BOF steel slag content has the best long-term anti-skid performance.
Highlights
Steel slag is a solid waste slag produced in steel-making process, mainly composed of silicate and oxide aggregates [1]
Steel slag is a kind of recycled material which has the potential to replace natural aggregate to prepare asphalt mixture
Marshall specimens with different BOF steel slag contents were prepared by impacting 75 times on each side, including one granite control group (H) and four experimental group (S25, S50, S75, S100), using BOF steel slag to replace granite coarse aggregate in different proportion
Summary
Steel slag is a solid waste slag produced in steel-making process, mainly composed of silicate and oxide aggregates [1]. The skid resistance attenuation rate of steel slag asphalt mixture was slower than that of basalt asphalt mixture [3]. Wu used steel slag as coarse aggregate in asphalt mixture to verify its feasibility, and pointed out that the asphalt mixture with steel slag had better skid resistance than ordinary basalt asphalt mixture [5]. There are few laboratory studies on long-term skid resistance of steel slag asphalt mixture and its attenuation law. The polishing devices, used to evaluate the skid resistance of asphalt mixture in laboratory, cannot simulate the polishing effect of real road surface under the vehicle load, resulting the skid resistance attenuation law of asphalt mixture has some limitations. Instruments that can be used to measure the polishing performance of aggregates
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