Effects of thermal-oxidative aging on rheological properties of montmorillonite modified bitumen

被引：6

作者：

Feng Peng-cheng ^{[1
]}

Yu Jian-ying ^{[1
]}

Wang Xiao ^{[1
]}

Tao Yuan-yuan ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2008年 / 15卷 / Suppl 1期

基金：

中国国家自然科学基金;

关键词：

montmorillonite; bitumen; aging; rheological property;

D O I：

10.1007/s11771-008-0339-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Organic montmorillonite (OMMT) modified bitumen nanocomposites was prepared by melt blending. The effects of thin-film oven test(TFOT) and pressure ageing vessel(PAV) on rheological properties of pristine bitumen and OMMT modified bitumen were investigated by dynamic shear rheometer (DSR). The results show that complex modulus (G*) increases, phase angle (delta) decreases and rutting factor (G*/sin delta) is enhanced for the pristine bitumen after TFOT, whereas G*, delta and G*/sin delta of OMMT modified bitumen have a little change before and after TFOT. Besides, the pristine bitumen exhibits a large increase of G* and a great decrease of delta after PAV aging. However, the changes in G* and delta of OMMT modified bitumen are small before and after PAV. Compared with the pristine bitumen, OMMT modified bitumen presents a lower fatigue factor (G* sin delta) after PAV. As a consequence, resistance to thermal-oxidative aging of bitumen is remarkably improved due to the introduction of OMMT.

引用

页码：167 / 171

页数：5

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