中文摘要：

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。

英文摘要：

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 rutting resistance of ETLA is better than two kinds of base asphalt, and the advantage is more obvious with the increasing of co. Meanwhile the value of G＊/ sin（δ） is decreased in accordance with power function with temperature increasing; ETLA has the strongest sensitivity to temperature, but the influence of r is small on the G＊/sin（δ）. 7 tabs, 11 figs, 12 refs.