Laboratory Evaluation on the Static and Dynamic Modulus of Asphalt Concrete with Different High-Modulus Additives

Abstract

The objective of this study is to present a systematic laboratory investigation into the static and dynamic modulus of high-modulus asphalt concrete (HMAC). The static moduli of mixtures with different additives at 15℃ , 20℃ and 60℃ were determined based on the uniaxial compression test and their dynamic moduli were also tested using the Simple Performance Test apparatus. Moreover, the influencing factor analysis (IFA) on both moduli and the correlation between them were analyzed. Results indicate the static modulus of HMAC decreased significantly with the rise of temperature and mixture with PR Module (PRM) showed greater modulus than others. In addition, regardless of temperature and loading frequency, the dynamic modulus of HMAC was much greater than that of virgin asphalt concrete. Finally, a good correlation between static and dynamic modulus of HMAC was found which could be applied into approximate prediction of dynamic modulus in the case that dynamic modulus cannot be easily obtained.