Development of a multi-modal overlay tester for the evaluation of asphalt overlay cracking behaviors
| Autor: | Jin-Whoy Park, Sung Woo Ryu, Yoon-Ho Cho, Wuguang Lin, Christopher Jabonero |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
0211 other engineering and technologies 02 engineering and technology Structural engineering Overlay Cracking Modal Asphalt 021105 building & construction Reflection (physics) Fracture (geology) Development (differential geometry) business Geology 021101 geological & geomatics engineering General Environmental Science Civil and Structural Engineering |
| Zdroj: | Canadian Journal of Civil Engineering. 47:1258-1266 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/cjce-2019-0227 |
| Popis: | Reflection cracking is a critical issue in asphalt overlay pavement. Temperature variation and traffic loading are the main fracture modes acting on the material. In this paper, a multi-modal overlay tester is proposed for the evaluation of the reflection cracking resistance of an asphalt mixture, an approach that simulates three loading modes on asphalt specimens. A fine dense-grade hot mix asphalt is used as the test specimen and subjected to different loading conditions such as single Mode I, II, and III loading simulations and combined I+II and I+II+III loading simulations. Results show coefficients of variation (CVs) of 2.5%, 10.3%, and 7.4% for the Mode I, II, and III loading simulations, respectively. Furthermore, the β coefficient, with a CV of 7%, is used to represent the crack resistance of the asphalt mixture. Finally, the crack propagation occurs rapidly when subjected to tension and lateral displacement prior to repeated traffic loading simulations. |
| Databáze: | OpenAIRE |
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