| 摘要: |
| 为定量评价真实沥青膜厚的沥青与集料黏结性能，基于表面能理论分析了沥青、集料与不锈钢夹具三相体系的潜在破坏模式，采用动态剪切流变仪（DSR）测试了5种沥青与2种集料在无水、有水及不同温度下的黏结性能.结果表明：无水条件下，沥青趋向于发生内聚性失效，而在有水条件下，其趋向于发生沥青与集料界面的黏附性失效；残留拉拔强度比（RSR）与残留拉拔功比(RWR)指标能较好地区分不同沥青与集料的黏结性能，推荐采用30℃下的RWR评价沥青与集料的黏结性能. |
| 关键词: 黏附性 水损害 接触角 表面能 |
| DOI：103969/j.issn.1007 9629202103024 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51278203）；广东省自然科学基金资助项目（2019A1515011965） |
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| Bonding Performance Evaluation and Verification between Asphalt and Aggregate Based on True Asphalt Film Thickness |
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WANG Duanyi, GUO Xiuling, TANG Cheng
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Institute of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China
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| Abstract: |
| In order to quantitatively evaluate the bonding performance between aggregate and asphalt under the true asphalt film thickness, the potential failure mode of the three phase system of asphalt, aggregate and stainless steel fixture was analyzed by surface energy theory. The bonding performance between five asphalts and two aggregates were tested in dry and wet condition under different temperature by dynamic shear rheometer(DSR). The results show that the asphalt tends to fail with cohesion mode in dry condition, the adhesion failure occurs at the interface between the asphalt and aggregate in wet condition, respectively. Residual strength ratio (RSR) and residual work ratio(RWR) can distinguish the bonding performance between different asphalts and aggregates, RWR at 30℃ is suggested to evaluate the bonding performance between asphalt and aggregate. |
| Key words: adhesion water damage contact degree surface energy |
