期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 166, 期 -, 页码 50-58出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.01.086
关键词
Asphalt binder; Cracking resistance; Aging; Temperature; Fenix test
资金
- Spanish Ministry of Economy and Competitiveness, through the call RETOS-COLABORACION of the National Programme of Research, Development and Innovation to face the challenges of Society, within the National Scientific and Technical Research and Innovation P [RTC-2015-4025-4]
- European Union through FEDER funds
Asphalt binder characterization is a complex and difficult task due to its rheological behaviour. Indeed it has been traditionally realized by means of simple tests at an established temperature. An added challenge is that low temperatures, as well as binder aging, lead to significant changes in the viscoelastic behaviour of binders. This study aimed to characterize asphalt binders, not through the traditional procedures, but through the ductility and tenacity that they provide to a mixture, being these two properties directly related to the cracking response of the binder. To this end, a new approach for asphalt binder characterization was proposed based on the application of the Fenix test on a standard mixture with a defined aggregate gradation and composition, without fines or filler, manufactured with different types of binders and tested at different temperatures, as well as subjected to accelerated aging in laboratory. The obtained results showed the thermal susceptibility of binders, which evidence the need to characterize binder performance at different temperatures to obtain a reliable cracking response. In addition, binder aging results in a more brittle cracking fracture, being the aging effects more pronounced in high penetration binders. (C) 2018 Elsevier Ltd. All rights reserved.
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