The objectives of this study were to (1) determine the appropriate trigger measure such as asphalt or water absorption and to identify the appropriate trigger value, which necessitates use of Dry Back procedure, and (2) determine if there are improvements that can be made to the Dry Back procedure to make it less subjective and produce more repeatable and reliable test results. The results of the research shall be used to modify the existing AASHTO T 209 test procedure.
STATUS: The project final report was submitted to AASHTO COMP for review and further possible action.
