摘要
针对我国常用的沥青高温指标和温度敏感性指标的不足,首先运用自行研发的稠度测试仪进行了沥青黏弹性分析,发现沥青黏性部分是影响沥青高温性能的关键,由此提出了沥青纯黏性稠度的概念及计算方法.与沥青混合料动稳定度的比较分析表明:纯黏性稠度克服了我国现有高温指标不适宜评价改性沥青的缺点,可以作为沥青的高温指标.文中还通过稠度与温度关系的分析,提出了表征沥青感温性的稠度-温度指数及其计算方法.最后,给出了沥青纯黏性稠度和稠度-温度指数标准的建议值.
In order to overcome the shortcomings of the widely-used indexes that describe the high-temperature performance and temperature susceptibility of asphalt, this paper analyzes the visco-elasticity of asphalt by means of a self-developed consistency tester. It is found that the viscosity greatly affects the high-temperature performance of asphalt. Based on this conclusion, a concept of visco-consistency is proposed and the corresponding calculation method is presented. As compared with the dynamic stability of asphalt mixture, the visco-consistency is an effective index to describe the high-temperature performance because it can be used to evaluate modified asphalt. In addition, a consistency-temperature index and its calculation method are introduced according to the relationship between the temperature and the consistency, which is adopted to characterize the temperature susceptibility of asphalt. The recommended values of the two proposed indexes are finally presented.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第2期35-40,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
国家“863”计划项目(2002AA335100)
关键词
沥青
稠度
稠度-温度指数
高温性能
感温性能
asphalt
consistency
consistency-temperature index
high-temperature performance
temperature susceptibility
