Open graded friction course (OGFC) asphalt mixture is a permeable mixture allowing water to flow through the pavement and drain out to the sides. The friction course significantly reduces splash/spray from vehicles and reduces vehicle noise. However, the accumulated pollutants in the surface of pavement, caused by vehicle fuel leak, tire wear, and vehicle exhaust adhesion can drain into natural water. It can cause environmental water pollution. In this study, the decontamination ability of OGFC with different air voids was investigated. The high temperature resistance of OGFC asphalt mixture was evaluated by wheel tracking testing. A new rain simulation device was designed to control the rainfall intensity and duration in laboratory. The densities of chemical oxygen demand (COD) and suspended solid (SS) were measured. The results showed that the decontamination ability increased with the increasing of air voids for OGFC asphalt mixture and the decontamination effect for COD was less than that for SS. Furthermore, to balance the performance and decontamination effect, the OGFC asphalt mixture with 21% air voids was recommended for wearing course of pavement.
Laboratory Evaluation of Decontamination Ability for Runoff Water through OGFC Asphalt Mixtures with Different Air Voids
10th Asia Pacific Transportation Development Conference ; 2014 ; Beijing, China
2014-05-05
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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