Shear Performance of Different Types of High Modulus Asphalt Mixtures

Abstract

Abstract: In order to study the shear performance of different types of high modulus asphalt mixtures, the complex shear modulus and phase angle of EME2 asphalt mixture and AC-20 asphalt mixture were measured by Superpave shear testing machine according to frequency sweep test at constant height (FSCH) method. According to the time-temperature equivalent principle, the complex shear modulus master curves at reference temperature were obtained through non-linear least square regression analysis, and the master curves were used to predict the high and low temperature performance of the two types of asphalt mixtures. Through the repeated shear test at constant height (RSCH), the end load strain and shear slope of two high modulus asphalt mixtures were obtained. The FSCH results show that the complex shear modulus of the two asphalt mixtures decreases with the increase of temperature and increases with the increase of load frequency. The high temperature shear performance of AC-20 asphalt mixture is better than that of EME2 asphalt mixture, and the normal temperature deformation resistance of EME2 asphalt mixture is better than that of AC-20 asphalt mixture. The RSCH results show that the shear performance of AC-20 asphalt mixture is better than that of EME2 asphalt mixture at 60 ℃.

Key words: high modulus asphalt mixture, complex shear modulus, frequency sweep test at constant height (FSCH), repeated shear test at constant height (RSCH), high and low temperature performance

CLC Number:

U414

HAO Peiwen, WANG Junbiao, ZENG Zhiwu, ZHAO Chaozhi, WU Tao, LI Dewen. Shear Performance of Different Types of High Modulus Asphalt Mixtures[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2020, 39(12): 4054-4060.

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