期刊论文

中文

长安大学学报(自然科学版)

1671-8879

2015

35

3

46-52

10.19721/j.cnki.1671-8879.2015.03.008

51078045:国家自然科学基金 kfj130401:特殊环境道路工程湖南省重点实验室重点项目 2013gxjgclkf-002:广西道路结构与材料重点实验室培育基地开放基金 2014G1502011:道路结构与材料交通行业重点实验室开放基金

本校为第一机构

近年来特立尼达湖沥青(TLA)的应用日趋广泛,但对其作用机理的研究涉及较少。采用分离抽提方法得到TLA中沥青类部分(ETLA),利用扫描电镜、组分、红外光谱、热分析和动态剪切流变仪(DSR)试验,研究其微观组成和使用性能。研究结果表明:ETLA沥青质含量远超过2种基质沥青,芳香分和饱和分含量正相反;ETLA热吸收峰明显小于基质沥青,热重数据也显示其热稳定性要优于基质沥青;ETLA抗车辙能力远强于2种基质沥青,随角速度ω增加优势更明显,G~*/sin(δ)随温度的升高呈幂函数形式减小; ETLA对温度的敏感性也最强,而剪应力τ的影响程度较小。

Trinidad Lake asphalt (TLA) was widely used in recent years, but few researches have been done on its mechanism. The ETLA was obtained by extraction method, and the microscopic character and performance were studied by scanning electron microscopy, components, infrared spectroscopy, thermal analysis and DSR test. The results show that asphalt content of ETLA is far more than two kinds of base asphalt, but the content of aromatics and saturated is opposite. Heat absorption peak of ETLA is significantly less than base asphalt, and the thermal stability is also better. It is found that the ruttin...