Many miles of pavement that are stripped need to be restored to a serviceable condition, but there is no accepted procedure to determine whether the pavement should be removed during the rehabilitation process. This paper describes an attempt to develop a methodology that employs a quantitative test to evaluate pavement layers. The indirect tensile test was used under various testing conditions to develop a deterioration curve for stripped pavement layers based on data from three field projects. The procedure will be valuable because it will make possible the evaluation of individual layers of asphalt; for in situ strength tests, however, such as those provided by deflection devices, that employ dynamic field measurements, the asphaltlayers are evaluated as a whole. Criteria defining minimum strengths necessitating removal are suggested. It is realized that these criteria may have to be changed as experience with the evaluation procedure is gained. This paper appears in transportation research recordno. 1228, Asphalt mixtures and asphalt chemistry.
Samenvatting