Pavement surfaces should have adequate friction to minimize the skid related accidents. Pavement surfaces should also exhibit sufficient friction withstanding the seasonal and long term variation. Several past studies have addressed these aspects with no significant or useful conclusions. The seasonal variation of surface friction was measured monthly for both portland cement concrete (PCC) and asphalt concrete (AC) pavements. For long term friction performance analysis, field data of Long Term Pavement Performance (LTPP) program were obtained for both PCC and AC pavements incorporating all geographic/climatic regions of Canada and United States. Analysis has shown that seasonal variation of AC and PCC pavements wet surface friction are identical and dependent on ambient or pavement temperature during the testing (driving). AC surface friction was shown to increase for up to about eighteen months following the construction and decrease thereafter for about six years. For PCC pavements, friction increases for about 2.5 years following the construction and then decreases for about twelve years. For the covering abstract of this conference see ITRD number E216597.
Samenvatting