ASSESSMENT OF STRIPPED ASPHALT PAVEMENT

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 asphalt layers 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.