Journal Published Online: 18 January 2016
Volume 44, Issue 2

Effect of Property Variations of Raw Materials on the Variability of Dynamic Moduli of Asphalt Mixtures



This paper presents a research on the variability of dynamic modulus of asphalt mixtures because of the variations of raw materials by error propagation theory. The coefficient of variation of dynamic module, COVE, was derived from the η-based predictive model and the variance propagation model. Then, the raw materials' properties related to the dynamic modulus of asphalt mixture were measured and collected, and the coefficients of variation (COV) were finalized and substituted into the COVE expression. The effects of variations of raw materials' properties on the variability of dynamic module were investigated, and the efficiencies and relative efficiencies of reducing materials variability on decreasing COVE were also calculated. It is found that Va makes the greatest contributions, followed by ρ4.75 and Vbeff. At high temperature the contribution of viscosity is similar to that of Vbeff, but is negligible at low temperature. However, the contributions of others are very small in all conditions. Reducing COV of ρ4.75 is with the most efficiency to decrease COVE and reducing COV of Va is with the most relative efficiency. Efficiency of reducing COV of binder viscosity varies greatly with the temperature and frequency, whereas reducing COV of other parameters are much less efficient.

Author Information

Zhang, Jiupeng
School of Highway, Chang'an Univ., Xi'an, Shaanxi Province, CN
Hu, Dongliang
School of Highway, Chang'an Univ., Xi'an, Shaanxi Province, CN
Yang, Fenghua
Dept. of Management Engineering, Shaanxi Railway Institute, East Section No.1 of Zhan Bei Rd., Weinan, Shaanxi Province 714000, CN
Pei, Jianzhong
School of Highway, Chang'an Univ., Xi'an, Shaanxi Province, CN
Lu, Ruiguo
Ningxia Highway Survey and Design Institute Limited Liability Company, Yinchuan, Ningxia, CN
Pages: 10
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Stock #: JTE20150140
ISSN: 0090-3973
DOI: 10.1520/JTE20150140