沥青四组分对沥青与集料黏附-黏聚性的影响

Effect of four components of asphalt on adhesion and cohesion between asphalt and aggregate

为了研究沥青四组分对沥青与集料间黏附-黏聚性的影响,选用3种油源、2种标号的老化前后的沥青,利用石灰岩、辉绿岩和花岗岩3种集料石板作为刚性底板,采用无纺布作为沥青的有效载体,进行90°剥离试验。结果表明:3种油源沥青与集料的黏附性和沥青质均存在明显的相关性,老化使沥青质增多、聚集,从而使黏附强度下降;油源相同的沥青与石灰岩的黏附性相关性最好,辉绿岩次之,花岗岩最差;花岗岩与沥青之间的黏附性和沥青四组分的回归方程相关性最好,石灰岩次之,辉绿岩最差。

To study the influence of four components of asphalt on the adhesion and cohesion between asphalt and aggregate,three oil sources and two grades of asphalt before and after aging were selected,and three kinds of aggregates(limestone,diabase and granite)were used as rigid bottom plate.And non-woven fabric was used as effective carrier of asphalt for 90°peeling test.The results show that there is an obvious correlation between asphaltenes and the adhesion of asphalt from three oil sources and aggregates.Aging increases and aggregates asphaltene,resulting in the decrease of adhesion strength.The adhesion between asphalt with the same oil sources and limestone is the best,diabase is the second,and granite is the worst.Regression equation’s correlation between the adhesion of granite and asphalt and asphalt’s four components is the best,followed by limestone and diabase.