作 者:
;
(陈平);
(李丹);
机构地区:
南京长江第三大桥有限责任公司江苏南京210028
出 处:
《公路交通科技》
2005年第7期6-9,共4页
摘 要:
低温性能是沥青性能的一个重要方面,因此,有必要对其评价指标加以研究。在对沥青测力延度的大量试验基础上,本文分析了基质沥青、改性沥青以及短期老化(RTFOT)和长期老化(PAV)后的拉伸特性机理。通过与SHRP低温劲度的相关性分析,确定的测力延度评价指标如下:(1)基质沥青:D1 F0(或|K0 K1|);(2)改性沥青:D Fz。并在与延度的比较中进一步说明了测力延度能更有效评价沥青的低温性能。
The low-temperature performance is an important aspect of the asphalt performance,therefore it is necessary to research its appraisal index.This paper analyses the tensile performance of the asphalt and modified asphalt including aging- asphalt.Compared with the stiffness of SHRP,the index of measuring-stress ductility determined is as follows:(1) Unmodified asphalt:D_1/F_0(or|K_0/K_1|);(2)modified asphalt:D/F_Z.And the result shows that the measuring-stress ductility is more effective in evaluation of low-temperature performance of asphalt compared with the simple ductility.
关 键 词:
测力延度
峰值力
低温性能
领 域:
[交通运输工程]