沥青–集料黏附测试方法与冻融劈裂试验的相关性研究
Study on the Correlation between Asphalt-Aggregate Adhesion Test Method and Freeze-Thaw Splitting Test

本文利用传统水浸法、水浸法 + 图像处理法及接触角法开展不同沥青与集料之间的黏附性研究，测定黏附等级、剥落率、接触角及黏附功等指标，并进行与沥青混合料冻融劈裂试验之间的相关性分析，探索黏附性与沥青、集料指标的影响关系，结果表明：传统水浸法采用目测判断的方法，不能很好地对比出同种集料与不同沥青的粘附性差别，在实际工程应用只能作为一种简单的参考，对实际工程应用指导不足；水浸法 + 图像处理法得到的剥落率，接触角法得到的黏附功测定黏附功，均能够准确定量的表征不同沥青与集料的黏附性优劣；对于基质沥青，水浸法 + 图像处理法、接触角法与沥青混合料水稳定性具有良好的相关性，对工程实际应用具有很好的指导作用；三种试验方法评价改性沥青与集料黏附性均存在一定的弊端，还需开发准确度更高、适用性更广的黏附性评价方法。
In this paper, the traditional water immersion method, water immersion method + image processing method and contact angle method are used to study the adhesion between different asphalt and stone. The adhesion grade, spalling rate, contact angle and adhesion work are measured, and the correlation between them and the freeze-thaw splitting test of asphalt mixture is analyzed to explore the influence relationship between the adhesion and the indexes of asphalt and stone. The results show that: the traditional water immersion method uses visual judgment method, which cannot well compare the difference of adhesion between the same aggregate and different asphalt, and can only be used as a simple reference in practical engineering application, which is insufficient for practical engineering application guidance. The results show that the spalling rate obtained by water immersion method + image processing method, the adhesion work obtained by contact angle method and the adhesion work measured by measurement can accurately and quantitatively characterize the adhesion between different asphalt and stone. For the base asphalt, the water immersion method + image processing method and contact angle method have good correlation with the water stability of asphalt mixture, which has a good guiding role for the practical application of engineering; there are some disadvantages in the three test methods to evaluate the adhesion between modified asphalt and stone, so it is necessary to develop a more accurate and applicable adhesion evaluation method.