Nondestructive Evaluation of Asphalt Mixtures by Ultrasonic Method

摘要

This paper reports on the ultrasonic testing method, one of the non-destructive tests, measuring modeli of asphalt mixtures such as E-moduli, G-moduli and Poisson's ratio. These moduli vary greatly under the influence of temperature. As the temperature rises, the dynamic E-moduli and the dynamic G-moduli decrease, while the dynamic Poisson's ratio increases. The dynamic E-moduli of the asphalt mixture, to which the repeated compressive loadings are applied, increase temporarily, while the dynamic Poisson's ratio decreases. The greater the compressive strength exhibits, the higher the dynamic E-moduli are observed.