Effect of Asphalt Cement Deficiency on Open-Graded Friction Courses

摘要

Raveling is a very common and visible form of asphalt concrete degradation thatdecreases the effective life of open-graded friction courses. This, in turn, reduces their effectiveness for skid resistance and traffic safety. One of the major causes of raveling is an initial asphalt cement content below design value (asphalt cement deficiency or lean mix). This research project studies the effect of asphalt cement deficiency on open-graded friction courses in the state of Florida. Two types of OGFC friction course (FC-2 and FC-5) currently in use in Florida are investigated. This is accomplished by searching FDOT road construction databases for original AC content information for selected Florida highways and then conducting laboratory testing on pavement cores obtained from these roads.