| 摘要: |
| 从操作可行性角度，在现有沥青表面能试验方法中筛选出Wilhelmy吊片法和躺滴法进行研究，通过室内试验对比分析了以上2种试验方法的原理、过程、条件以及数据，并基于试验结果评价了Wilhelmy吊片法的试验条件对表面能参数测试结果的影响.结果表明：采用Wilhelmy吊片法和躺滴法进行沥青表面能测试均可行有效，其中Wilhelmy吊片法在试验样品准备、试验温度控制、试验时对液滴量的控制以及试验数据的有效性和稳定性上更优；沥青的表面能主要由范德华力提供，表面能参数中酸碱力作用较小；表面能测试过程和试验条件会显著影响表面能参数的测试结果，建议Wilhelmy吊片法的试件保温处理条件为120℃且保温2h，测试时间控制在20～60s，室温养生时间不超过3d. |
| 关键词: 道路工程 沥青 表面能 表面能参数 接触角 |
| DOI：10.3969/j.issn.1007 9629.2017.03.028 |
| 分类号: |
| 基金项目:上海市科技人才计划项目（14YF1403500） |
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| Test Method and Test Condition of Asphalt Surface Energy |
|
SUN Yu, LI Lihan, SUN Yanna
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Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
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| Abstract: |
| Wilhelmy plate method and sessile drop method were chosen from current existing test methods to evaluate asphalt surface energy with considering operation possibility. The theory， procedure， condition， and the data of the two methods were comparatively analyzed. The influence of test condition on the results of surface energy parameter was discussed based on experimental results of Wilhelmy plate method. The results show that both Wilhelmy plate method and sessile drop method are feasible. However， Wilhelmy plate method performs better in the aspects of sample preparation， temperature controlling， droplet quantity controlling， and the validity of experimental data， so it is recommended to be used for testing the surface energy of asphalt. The surface energy of asphalt mainly depends on Van der Waals force for the sake of low acid base force. The test procedure and conditions will significantly affect the results of surface energy parameter. It is recommended that the temperature of preservation is 120℃ for about 2 h， the testing time is 2060s， and the conditioned time is no longer than 3 d when using Wilhelmy plate method. |
| Key words: road engineering asphalt surface energy surface energy parameter contact angle |
