Measure of Creep Characteristics of Asphalt Concrete

摘要

This research sought to evaluate the shell procedures as a tool for predictingrutting of asphalt mixtures under simulated F-15 traffic. Half the asphalt mixtures used for the test sections were designed with marshall procedures and the balance with the Gyratory Testing Machine. Predictions of both mixtures were made with sample from the paver and from cores extracted from the mat. Creep characteristics were obtained with unconfined static and dynamic testing in the laboratory. Although the rutting potential of asphalt mixtures used in this study could be qualitatively ranked relative to each other. The shell procedures, using statics or dynamic testing, did a mediocre job of quantifying the rut depths produced in this test. Dynamic tests tended to underestimate the rut; static tests over predicted rutting of the Gyratory-Designed Mixtures and Underestimated Rutting of Marshall Mixtures. Prediction of the rut depth may be only of academic interest, anyway. The real need is to prevent rutting. (mm).