基于浸润参数和表面能理论的沥青与集料黏附性分析

发布时间：2018-06-26 20:06

本文选题：接触角 + 表面张力　；参考：《北京工业大学学报》2017年09期

【摘要】：为了解决沥青与集料黏附性缺乏量化评价方法的问题,分别采用光学接触角测量仪、表面张力测试仪和自动压汞仪对沥青与集料的接触角、沥青表面张力和集料的孔隙分别进行了测定,通过试验结果对沥青与集料的浸润参数和表面能参数进行了计算,并据此对沥青与集料的黏附性进行了评价;分析了沥青与集料黏附性的影响因素,并通过测定不同温度下沥青的表面张力,结合理论分析建立了沥青表面张力与温度的关系模型.研究结果表明:可以采用浸润参数和表面能理论对沥青与集料的黏附予以评价;较大的孔隙度和平均孔径有利于集料对沥青的吸附;沥青对集料的浸润深度h越大、浸润时间t越短,有利于产生更好的浸润效果;沥青与集料黏附功和浸润功越大,浸润性越好;沥青与集料间的黏附性与沥青表面张力、沥青与集料接触角以及集料表面特性等因素有关.
[Abstract]:In order to solve the problem of the lack of quantitative evaluation method for the adhesion between asphalt and aggregate, the contact angle between asphalt and aggregate was measured by optical contact angle measuring instrument, surface tension tester and automatic mercury injection instrument, respectively. The surface tension of asphalt and pore of aggregate were measured, the wetting parameters and surface energy parameters of asphalt and aggregate were calculated, and the adhesion between asphalt and aggregate was evaluated. The factors affecting the adhesion of asphalt to aggregate are analyzed. The relationship between surface tension and temperature is established by measuring the surface tension of asphalt at different temperatures and combining with theoretical analysis. The results show that the adhesion between asphalt and aggregate can be evaluated by the theory of wetting parameters and surface energy, the larger porosity and average pore size are favorable to the adsorption of asphalt to aggregate, the greater the depth of infiltration of asphalt to aggregate is. The shorter the soaking time t is, the better the wetting effect is, the greater the adhesion work and the wetting work between asphalt and aggregate, the better the wettability, the better the adhesion between asphalt and aggregate and the surface tension of asphalt. Asphalt is related to contact angle of aggregate and surface characteristic of aggregate.
【作者单位】：长安大学特殊地区公路工程教育部重点试验室;长安大学道路施工技术与装备教育部重点试验室;
【基金】：国家自然科学基金资助项目(51308061)
【分类号】：U414

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