ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 1 August 2012
Page Count: 4

A Study on Photo-thermal Coupled Aging Kinetics of Bitumen

Wang, Hui
State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan,

Feng, Zhengang
State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan,

Zhou, Bo
State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan,

Yu, Jianying
State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan,

(Received 15 March 2012; accepted 30 April 2012)

Abstract

The effect of photo-thermal coupled aging on the viscosity of bitumen was investigated at three different temperatures and three different ultraviolet (UV) light intensities. The photo-thermal coupled aging kinetic model of bitumen was put forward based on the viscosity of bitumen under different photo-thermal coupled aging conditions. In order to evaluate the extent of aging in bitumen, kinetic parameters based on the aging kinetic model were calculated and compared. The results reveal that UV radiation and heat play a coupled role in accelerating the aging process of bitumen. Photo-thermal coupled aging has a greater influence on the aging rate of bitumen than single factor aging. A higher aging temperature and UV intensity have a more pronounced effect on the photo-thermal coupled aging, which leads to an obvious acceleration of the aging reaction rate.

Keywords:
bitumen, photo-thermal coupled aging, aging kinetics, viscosity

Paper ID: JTE20120065
DOI: 10.1520/JTE20120065
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