Study on the skid resistance of asphalt pavement covered with spreading chips

Asphalt plates covered with spreading chips of different aggregates were produce in laboratory. The plates were polished with real tires by the so called Aachen Polish Machine, which had been constructed by the Institute of Road and Traffic Engineering Aachen. The friction coefficient was measured with PWS after different stages of polishing. The friction test showed that asphalt with spreading chips can avoid the poor skid resistance at the early stage of polishing. It can be inferred that, asphalt pavement with spreading chips on the surface can not only keep high skid resistance in the short term, but can also maintain high friction in the long run over the whole design period of the road.