ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 9 September 2010
Page Count: 6

Modeling the Effects of Temperature and Loading Rate on Fatigue Property of Asphalt Binder

Wen, Haifang
Washington State Univ., Pullman, WA

Shen, Shihui
Washington State Univ., Pullman, WA

Ma, Zhanpeng
Washington State Univ., Pullman, WA

Wang, Jingan
Washington State Univ., Pullman, WA

(Received 23 October 2009; accepted 26 April 2010)

Abstract

Fatigue cracking is one of three major distresses for asphalt pavement. Asphalt binder is a very important component of asphaltic mixture. The fatigue performance of asphalt binder also greatly affects that of asphaltic mixture. Asphalt binder’s fatigue characteristics are affected by external conditions, such as temperature and loading rate. It is warranted to study the effects of these external conditions on fatigue of asphalt binder and take them into account. New fatigue tests and properties have been proposed to characterize the fatigue behavior of asphalt binders, such as monotonic constant shear-rate tests. This study investigated the effects of temperature and shear rate on fatigue properties of asphalt binder. Two asphalt binders were tested with a range of temperature and shear rates. It was found that time-temperature superposition principle also applies to critical strain energy density and shear strength of asphalt binders. The values of shift factors for building the master curves of critical strain energy and shear strength are comparable.

Keywords:
asphalt binder, fatigue, critical strain energy, shear strength

Paper ID: JTE102806
DOI: 10.1520/JTE102806
ASTM International is a member of CrossRef.