关键词: 沥青,   ,  集料,   ,  接触角,   ,  黏附功

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.