摘要
使用弯曲梁流变仪测定6种普通沥青和6种改性道路沥青在不同温度和不同荷载时间下的蠕变劲度模量,根据时-温等效原理,采用Sigmoid模型经拟合得到沥青的劲度主曲线,利用劲度主曲线所包围的面积定量表征道路沥青的低温性能。结果表明,劲度指标物理意义明确,与常规指标相比能够更好地反映沥青的低温性能。
The bending beam rheometer（BBR） was used to measure the creep stiffness module for six base and six modified asphalts at different low temperatures and loading time. Based on the time-temperature superposition （TTS）, the Sigmoid model was employed to fit the experimental data and the master curves of the creep stiffness for the twelve asphalts were obtained. The area under the master curve was used to evaluate the low temperature performance of the asphalts. The results indicate that this index has a clear physical meaning and can evaluate the low temperature performance better than the traditional indexes.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第1期150-153,共4页
Journal of China University of Petroleum(Edition of Natural Science)
基金
中国石油天然气集团公司项目(030804-01-01)
关键词
道路沥青
低温性能
弯曲梁流变仪
劲度模量
paving asphalt
low temperature performance
bending beam rheometer
stiffness module
