高温液态沥青表面张力测试及影响因素分析
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1.上海海事大学 交通运输学院;2.同济大学 道路与交通工程教育部重点实验室;3.杭州海康威视数字技术股份有限公司

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Surface tension test methods and influencing factors for high-temperature liquid asphalt binders
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1.College of Transport & Communications, Shanghai Maritime University, Shanghai 201306;2.Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804;3.Hangzhou Hikvision Digital Technology Co ., Ltd

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    摘要:

    为提升高温液态沥青表面张力测试精度,推导差分毛细管法公式,探究表面张力测试的原理、方法及影响因素。结果表明,接触角及高度修正对内半径标定影响显著,内半径标定及优选对测试结果影响显著,建议选取内半径生产标号0.10、0.20mm的毛细管进行试验。改进后的差分毛细管法表面张力测试精度提高24.7%~49.2%以上。在此精度条件下,可有效区分表面活性温拌剂加入,及其掺量变化对高温液态沥青表面张力的影响,为高温液态沥青表面能参数测试提供了可行的技术途径。

    Abstract:

    In order to improve the test accuracy of high-temperature liquid asphalt binders surface tension, the differential capillary method formula was derived, and the principles, methods and influencing factors for surface tension testing were explored. Results indicate that the contact angle and corrected height have a significant effect on the inner radius measurement, and the inner radius measurement and optimization have a significant effect on the test results. It is recommended to select capillaries with nominal inner radii of 0.10mm and 0.20mm for surface tension test. The test accuracy of improved method for surface tension is increased by more than 24.7% to 49.2%. Under this accuracy condition, it can effectively distinguish the effect of surfactants and its dosage change on the surface tension of high temperature liquid asphalt, and provides a feasible technical approach for the surface energy parameter testing to high-temperature liquid asphalt binders.

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历史
  • 收稿日期:2020-04-20
  • 最后修改日期:2020-05-14
  • 录用日期:2020-05-25
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