Effect of pavement temperature on the macrotexture of a semidense asphalt surface

Abstract

International audienceThe temperature of the softening point of most bitumen is above 35ºC. Increasing the pavement temperature could change the texture surface of the pavement. The aim of this work is to analyze the influence of the surface temperature on the macrotexture of a semidense asphalt pavement located in an urban area and a semidense asphalt sample in laboratory. The superficial macrotexture profiles at different surface temperatures were measured with the LaserStaticPG-LA²IC and a texture scanner. The mean profile depth (MPD) and the texture spectra have been used for the macrotexture analysis. The analysis of the results shows that increasing pavement temperature does not necessary leads to a variation in the MPD index but a change of texture level has been observed for temperature superior to 40ºC. Moreover this study has allowed observing the repeatability of the measurements realized with the new LaserStaticPG-LA²IC and ensure another technique of road texture auscultation associating MPD and texture spectrum analysis to be used