Abstract:

Based on the wetting theory, the wettability between different kinds of asphalt and mixture has been studied. The adhesion work is calculated by the data of asphalt surface tension and contact angle test, and the quantitative evaluation of the wettability between the asphalt and mixture in different temperature is carried out through the data of the adhesion work. The results show that, the adhesion work data between the same kinds of asphalt and different kinds of mixture are close at the same temperature, and it will be quite different if the type of asphalt is changed. The data variation of the adhesion work between asphalt and mixture with temperature presents the conic relationship, and there is a maximum point in the curve. Therefore, asphalt and mixture can keep in an optimum wetting condition in the specific temperature. The greater the viscosity and the soft point of asphalt, the higher temperature is need for asphalt and mixture getting to the optimum wetting condition. If the type of asphalt is in the same, the temperature of its optimum wetting condition is close. The maximum point of the adhesion work represents the optimum wetting condition between asphalt and mixture, which can be used to guide the selection of the best mixing temperature for asphalt and mixture.

摘要：         以润湿理论为基础,研究了不同类型沥青与集料之间的润湿性能,基于沥青表面张力和接触角实验数据计算沥青与集料的黏附功,再通过黏附功的大小定量评价沥青在不同温度下对集料的润湿性能影响。结果表明,在相同温度下,同种沥青与不同集料的黏附功数值接近,而不同类型沥青与集料的黏附功数值相差较大;沥青与集料的黏附功随温度的变化呈二次曲线关系,且曲线存在最大值点,说明在特定温度下沥青与集料存在最佳润湿状态;黏度越大、软化点越高的沥青达到与集料最佳润湿状态时所需要的温度越高,同种沥青与两种集料达到最佳润湿状态时所需要的温度相近。最大黏附功代表了沥青与集料的最佳润湿状态,可用于指导选择沥青与集料最佳拌和温度。

关键词: 沥青,   ,  集料,   ,  接触角,   ,  黏附功