ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 1 August 2012
Page Count: 6

Performance Evaluation of SBS Modified Asphalt with Different Anti-aging Additives

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

Xu, Song
State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan,

Sun, Yubin
Center for Materials Research and Analysis, Wuhan Univ. of Technology, Wuhan,

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

(Received 7 March 2012; accepted 26 April 2012)

Abstract

The effects of three different types of anti-aging additives (bumetrizole, octabenzone, and tinuvin770) on the physical and rheological properties of styrene butadiene styrene (SBS) modified asphalt were investigated by means of conventional physical properties tests and dynamic shear rheometer (DSR) tests. In order to evaluate the aging properties of different anti-aging additive/SBS modified asphalts, the thin film oven test and ultraviolet (UV) radiation test were performed, and different aging parameters were compared. The results show that the penetration, ductility, and softening point are increased, whereas the viscosity is decreased, with the addition of different anti-aging additives. The DSR analysis indicates that anti-aging additives can enhance the elastic behavior and improve the thermal stability of SBS modified asphalt. Improvement in the thermal-oxidative aging properties of SBS modified asphalt can be achieved with the three different anti-aging additives, but the UV aging properties of anti-aging additive/SBS modified asphalts are dependent on the type of anti-aging additive. Of the three different anti-aging additives, tinuvin770 improves both the thermal- and the photo-oxidative aging resistance of SBS modified asphalt significantly.

Keywords:
SBS modified asphalt, anti-aging additive, thermal-oxidative aging, UV aging, rheological property

Paper ID: JTE20120047
DOI: 10.1520/JTE20120047
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