特立尼达湖沥青中沥青材料特性

发布时间：2018-03-19 01:37

本文选题：道路工程　切入点：特立尼达湖沥青　出处：《长安大学学报(自然科学版)》2015年03期 　论文类型：期刊论文

【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。
[Abstract]:In recent years, the application of Tela in Trinidad Lake is becoming more and more extensive, but the study of its action mechanism is less. The bitumen part of TLA is obtained by the method of separation and extraction, and the scanning electron microscope (SEM), the component and the infrared spectrum are used. Thermal analysis and dynamic shear rheometer (DSRs) tests were performed to study the microstructure and performance of asphaltene. The results showed that the content of asphaltene at 1: ETLA was much higher than that of two kinds of substrates, and the content of aromatic and saturated components was on the contrary, the thermal absorption peak of ETLA was obviously smaller than that of bitumen. The thermogravimetric data also showed that the thermal stability of ETLA was much better than that of the two kinds of bitumen, and with the increase of angular velocity 蠅, the thermal stability of ETLA was much better than that of the two kinds of bitumen. With the increase of angular velocity 蠅, the thermal stability of ETLA decreased with the increase of temperature in the form of power function, and the sensitivity of ETLA to temperature was also the strongest. The influence of shear stress 蟿 is small.
【作者单位】：长沙理工大学特殊环境道路工程湖南省重点实验室;
【基金】：国家自然科学基金项目(51078045) 特殊环境道路工程湖南省重点实验室重点项目(kfj130401) 广西道路结构与材料重点实验室培育基地开放课题(2013gxjgclkf-002) 长安大学道路结构与材料交通行业重点实验室开放基金项目(2014G1502011)
【分类号】：U414

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