1. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin Heilongjiang 150090, China;
2. Beijing Municipal Road & Bridge Building Material Group Co., Ltd., Beijing 102600, China
Dynamic Viscoelastic Property of Hard-Grade Asphalt Mixture
DONG Yu-ming1,2, TAN Yi-qiu1
1. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin Heilongjiang 150090, China;
2. Beijing Municipal Road & Bridge Building Material Group Co., Ltd., Beijing 102600, China
摘要Four hard-grade asphalt mixtures of two hard binders and two gradations are investigated in terms of their rutting resistance, cracking resistance, and moisture sensitivity. After examining the basic properties of the hard-grade asphalt mixture, its viscoelastic performance is given focus. The dynamic modulus test is executed at seven temperatures. Based on time temperature superposition, the sigmoid function of the viscoelastic models of the hard-grade asphalt mixture on is established, and the master curves of the dynamic moduli are also constructed. Results indicate that the hard-grade asphalt mixture has excellent resistance to rutting and that its low temperature performance and water sensitivity meet the current specifications. Research demonstrates that a dynamic modulus of coarse gradation is higher than that of fine gradation in the load frequency of 10-3-104 Hz. The viscoelastic analyses for the Christensen Anderson Marasteanu (CAM) model shows that the complex modulus of the glassy state Ge*of coarse gradation is higher than that of fine gradation. The crossing frequency fc in the CAM model of the fine gradation is higher than that of the coarse gradation. These results indicate that a finer gradation is beneficial to the low temperature performance of hard-grade asphalt mixture.
Abstract：Four hard-grade asphalt mixtures of two hard binders and two gradations are investigated in terms of their rutting resistance, cracking resistance, and moisture sensitivity. After examining the basic properties of the hard-grade asphalt mixture, its viscoelastic performance is given focus. The dynamic modulus test is executed at seven temperatures. Based on time temperature superposition, the sigmoid function of the viscoelastic models of the hard-grade asphalt mixture on is established, and the master curves of the dynamic moduli are also constructed. Results indicate that the hard-grade asphalt mixture has excellent resistance to rutting and that its low temperature performance and water sensitivity meet the current specifications. Research demonstrates that a dynamic modulus of coarse gradation is higher than that of fine gradation in the load frequency of 10-3-104 Hz. The viscoelastic analyses for the Christensen Anderson Marasteanu (CAM) model shows that the complex modulus of the glassy state Ge*of coarse gradation is higher than that of fine gradation. The crossing frequency fc in the CAM model of the fine gradation is higher than that of the coarse gradation. These results indicate that a finer gradation is beneficial to the low temperature performance of hard-grade asphalt mixture.
董雨明, 谭忆秋. 硬质沥青混合料的动态黏弹特性[J]. Journal of Highway and Transportation Research and Development, 2015, 9(4): 1-8.
DONG Yu-ming, TAN Yi-qiu. Dynamic Viscoelastic Property of Hard-Grade Asphalt Mixture. Journal of Highway and Transportation Research and Development, 2015, 9(4): 1-8.
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2015, Vol. 9 
