Effect of Ultraviolet Aging on Asphalt Rheological Properties  

作　　者：Wang Jiani Xue Zhongjun Tan Yiqiu Zhang Lei 

机构地区：[1]School of Civil Engineering, Beijing Jiaotong University [2]Beijing Major Projects Construction Headquarters Office [3]School of Communications Science & Engineering, Harbin Institute of Technology [4]Beijing Road Engineering Quality Supervision Station

出　　处：《China Petroleum Processing & Petrochemical Technology》2013年第4期26-32,共7页中国炼油与石油化工（英文版）

基　　金：supported by the National Natural Science Foundation of China(NNSFC,Grant No.50808058);the New Century Excellent Talents in University,2007(NCETU);the National Science Foundation for Post-doctoral Scientists of China(NSFPSC,Grant No.20080430925);the Specialized Research Fund for the Doctoral Program of Higher Education of China(SRFDPHEC,Grant No.200902403)

摘　　要：This paper simulated the ultraviolet aging process of asphalt and used dynamic mechanic analysis （DMA） method to evaluate the effect of ultraviolet aging on the asphalt theological properties. After having experienced ultravio- let aging, the low temperature performance of asphalt binder decreased significantly, with its complex modulus increased and phase angle decreased along with changing rheological properties as compared to the performance of original asphalt binder. The ultraviolet aging process would make asphalt binder more sensitive to brittle and fatigue failure. On the basis of the time-temperature superposition principle （TTSP）, the viscoelastic transition frequency （coT） is proposed to evaluate the effect of ultraviolet aging. It is found that with the increase in ultraviolet aging time, the cox moves to the lower frequency range gradually. Since the viscoelastic transition frequency is sensitive to the effect of aging, it can be used as an indicator of ultraviolet aging.This paper simulated the ultraviolet aging process of asphalt and used dynamic mechanic analysis(DMA)method to evaluate the effect of ultraviolet aging on the asphalt rheological properties.After having experienced ultraviolet aging,the low temperature performance of asphalt binder decreased significantly,with its complex modulus increased and phase angle decreased along with changing rheological properties as compared to the performance of original asphalt binder.The ultraviolet aging process would make asphalt binder more sensitive to brittle and fatigue failure.On the basis of the time-temperature superposition principle(TTSP),the viscoelastic transition frequency(ωT)is proposed to evaluate the effect of ultraviolet aging.It is found that with the increase in ultraviolet aging time,theωT moves to the lower frequency range gradually.Since the viscoelastic transition frequency is sensitive to the effect of aging,it can be used as an indicator of ultraviolet aging.

关 键 词：ASPHALT ultraviolet aging rheological properties viscoelastic transition frequency 

分 类 号：TE626.86[石油与天然气工程—油气加工工程]