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.
Highlights
The article deals with roughness, which is a variable parameter that is described either physically as skid friction between the road surface and the vehicle tire, or in geometric terms as the road surface morphology.Complex expression of road surface morphology is very demanding because of the range of amplitudes and wavelengths of surface irregularities, and because of the extent of the impact on the vehicle-road system interaction
Skid friction characterizes the roughness from a physical point of view. We can measure this friction in several ways, for our measurement we used a pendulum device (Fig. 9), which uses a rubber friction slider to determine the amount of road surface resistance
When the pendulum is released from its horizontal position, its kinetic energy is lost when the friction slider passes over the moistened surface at the prescribed rearrangement length, determining the degree of surface resistance to skid as the Pendulum Test Value (PTV) determined by the pointer's position on the scale [12]
Summary
The article deals with roughness, which is a variable parameter that is described either physically as skid friction between the road surface and the vehicle tire, or in geometric terms as the road surface morphology. Skid friction characterizes the roughness from a physical point of view We can measure this friction in several ways, for our measurement we used a pendulum device (Fig. 9), which uses a rubber friction slider to determine the amount of road surface resistance. The measured surface is evaluated and its basic characteristics are determined on the basis of which the given surface is evaluated These experimental measurements were carried out on the newly built section of the D1 motorway, at two stations in front of the Ovčiarsko tunnel portal and at two stations inside the Ovčiarsko tunnel building (Fig. 2). All measurements were made both on the vehicle's wheel path and lane center zone These measurements were made to compare the roughness characteristics on different road covers. It will be possible to determine the degradation difference only from traffic (inside the tunnel), but from the climatic effects and traffic (before the tunnel)
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