ABSTRACT
Over 300 million vehicle tires have been generated until 2010 in China. Of these, approximately 200 million are scrap tires and added to stockpiles, landfills, or illegal dumps (Ren et al. 2009). The alternative use of crumb rubber as an additive in asphalt concrete has beendiscussed and researched for the last 30years.The crumb rubber modified asphalt concrete (CRMAC) can be broken down into wet and dry processes. The wet process means the crumb rubber as an additive used in the asphalt binder, mixing of the crumb rubber with the binder and allowing time for their reaction prior to mixing with the aggregate. The dry process means rubber as an aggregate, simultaneous mixing of the crumb rubber, the binder, and the aggregate. Several researchers have proved that CRMAC have favorable performance with respect to resistance to moisture damage, high temperature stability and resistance to cracking at low temperature in laboratory tests (Zhang et al. 2005).
