How Does the Micro and Macrotexture of Cement Concrete Pavement Affect the Skid Resistance of Road

Paper by ERGUN OZTAS IYINAM IYINAM from ISCR 9th 2004 Instanbul Turkey

The fast development of car technology has caused a steady increase in the speed of vehicles and increasingly higher demands on braking and traction. International studies show that every increase in average speed causes increase in personal injury accidents. Yet the present transport infrastructure in general and cement concrete pavement surface texture characteristics in particular have not accompanied this development. In wet weather, the coefficient of friction between the pavement and a vehicle tyre can be quite low. At a certain speed, namely the aquaplaning speed, the coefficient of friction drops practically to zero. This means that there is no real contact between the pavement surface and the vehicle tyre. The main aim of this paper is to search the effect of cement concrete pavement surface micro- and macrotexture on skid resistance. To reach this aim, primarily the skid resistance is defined, then the relationship between skid resistance and accidents are explained. Second part deals with the development of a new model for skid resistance using not only the microtexture parameters but also the macrotexture parameters of cement concrete road surfaces. Finally, how the micro- and macrotexture of cement concrete pavement affect the skid resistance of road is evaluated.

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