ACPA Quarter 3 2019

www.acpa.org Quarter 3, 2019 15 traffic that did not need to exit,” explains Go- emaat. When rebuilding the southbound lanes, Archer Western had to complete the project in two phases to coordinate activities and traffic phasing with contractors working on an adjacent road project. Addressing the problems related to the drain- age layer was critical, says Thompson. “When we removed the concrete, we saw water had stripped the asphalt away from the drainage layer, leaving only clean stone that could not support the pavement,” says Thompson. Long joint spacings produced an increased occurrence of transverse slab cracking and the shifting clean stone underneath contributed to inadequate load transfer across the cracks, he adds. “According to Pavement ME, the pavement we now have is built upon a highly erosion resistant base that should support projected traffic with little to no cracking for 40 to 50 years.” » continued from page 13 I - 8 5 S P A R T A N B U R G C O U N T Y