1 Introduction</h5> 1.1 Evolution of skid resistance</h5> Skid resistance indicates the contribution of the road surface to the generation of friction between the tyre and the road surface and is one the most important surface properties with regard to safety. It is, for instance, one of the factors that determine braking distance and sliding forces in a sharp bend. However, due to the polishing action of the traffic, the skid resistance of an asphalt surfacing decreases continuously with time. Fig. 1 shows how the skid resistance changes with time Kane Malal et al.  .</P>1.2 Surface texture and skid resistance</h5> Skid resistance is primarily related to the road surface texture. Texture is characterized at two scale levels, namely, microtexture and macrotexture. The microtexture corresponds to surface irregularities whose dimensions range from 0.001 mm to 0.5 mm vertically and less than 0.5 mm horizontally ISO 12473-1  . It is generally an aggregate surface characteristic that provides small irregularities that disrupt the continuity of the water film and produces frictional resistance between the tyre and the pavement. The magnitude of microtexture depends on the initial roughness of the aggregate surface and the ability of the aggregate to retain this
Wear – Elsevier
Published: Jun 15, 2013
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