Within the framework of an agreement between the french public works national research institute, screg routes et travaux publics, and its regional subsidiary screg ouest, comparative experiments werecarried out on several porous asphalts using the nantes circular fatigue test track. This facility is designed to accelerate the effectof heavy traffic, making it possible to compare different pavement structures. Although this has never been done before, screg routes et travaux publics and french highway authorities decided to use thisequipment to follow the evolution of porous asphalts under traffic.Four mixes were selected, differentiated by the nature of the binder and the grading curve. One had a base of pure asphalt cement, two of elastomer (sbs) modified binder, and the last, developed by scregroutes et travaux publics, was pure bitumen and fiber based. After a short description of the test facility, the methodology developed for investigating the on-site properties of porous asphalts and presenting the results is defined. It is concluded that the experiments made it possible to observe trends in porous bituminous mixes under traffic, demonstrate the influence of mix design parameters on the stability of properties, and confirm the excellent performance of fiber-based porous asphalt. This paper appears in transportation research record no. 1265, Porous asphalt pavements: an international perspective 1990.
Abstract