In 2000, a review of Interstate 90 in Washington State revealed that pavements with asphalt thicknesses greater than 8 inches had never been rebuilt for structural reasons after in service, since the road was built over several years. The age at resurfacing ranged between 17 and 22 years.rnThat same year the Kansas DOT built four 500-foot-long sections with 11 - to 15-inch-thick asphalt layers placed on a clay subgrade on U.S. Route 75. Seven sessions of pavement response measurements under known vehicle loads were performed between July 2005 and October 2007.
展开▼
