期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 267, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.121787
关键词
Asphalt binder; Thermoreversible aging; Physical hardening; Modulated Differential Scanning; Calorimetry (MDSC); Wax content
资金
- Alberta Innovates through their Bitumen Beyond Combustion (BBC) program [AI 2515]
- National Natural Science Foundation of China [52008352]
Thermoreversible aging of asphalt is an important attribute that affects durability of flexible pavements. The aging process strongly depends on composition and particularly wax content. Binders produced from oil sands-derived crude oil with low wax contents benefit overall life cycle costs and improve the sustainability of the road building industry.
Thermoreversible aging of asphalt is an important attribute that affects durability of flexible pavements. Compared to irreversible, oxidative hardening, the reversible aging effect due to the presence of wax and other contaminants is often overlooked by producers and users alike. Understanding how thermal history affects microstructure will allow producers and users of asphalt to improve durability. To this end, several asphalts were investigated with modulated differential scanning calorimetry, showing that aging strongly depends on composition and particularly wax content. The formation of equilibrium structures follows generic Avrami and Ozawa theories of crystallization, and mainly involves solid-to-solid transformations rather than gross phase separation. Binders produced from oil sands-derived crude oil from Alberta, Canada, enjoy low wax contents. Their more widespread use would benefit overall life cycle costs and thereby improve the sustainability of the road building industry. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据