Comparison of pavement surface roughness characteristics of different wearing courses evaluated using 3D scanning and pendulum

Abstract

Road pavement roughness, in terms of skid resistance, can be described from a geometrical point of view as a texture or from a physical point of view as friction between a tire and a road surface. The paper deals with the comparison of asphalt and concrete pavement surface on selected newly built sections of the D1 motorway near the Ovčiarsko tunnel. Texture measurements were performed with a Static Road Scanner (SRS) capable of recording surface irregularities up to the microtexture level (2.49 µm resolution). A pendulum was used to determine the friction. Subsequently, the texture was evaluated using individual amplitude and wavelength characteristics and the friction was evaluated using the PTV parameter. Finally, correlations were searched between the roughness characteristics of asphalt concrete and cement concrete pavements, but also between texture and friction characteristics.

Stiffness Modulus of Aged Asphalt Mixtures

“…The aged binder loses its elasticity, becomes stiff and brittle, and causes a change in the stiffness of the asphalt mixture and the layer is more prone to frost and fatigue cracking, stripping of binder and aggregate from surface (roughness changes). Asphalt mixtures also show a higher noise level after 15 years of service life compared to asphalt mixtures being in operation for shorter duration and this parameter may be considered as an additional indicator of wearing course end of life [7,8]. At present, the testing of aged asphalt mixture is preferred to testing of the aged bitumen binder due to its more realistic modelling.…”