应用拉拔试验评价集料温度对沥青与集料粘附性的影响

Evaluation of Aggregate Temperature on Adhesion of Asphalt and Aggregate by Pull-out Test

集料和沥青之间的粘附性能的好坏是评价沥青混合料抗水损害能力的重要指标,也是沥青混合料形成强度的基础。通过改进的拉拔试验方法,以拉拔力损失率和剥落率两个指标进行粘附性评价,并与沥青混合料残余稳定度建立联系。结果表明改进的拉拔试验能够有效的评价沥青和石料之间的粘附性,同时石灰岩较花岗岩与沥青之间有更好的粘结性能和水稳定性,并随着石料温度的增加,集料吸附沥青效果更好,这对提高沥青和石料粘附性、增强抗水损害能力具有一定的指导意义。

The adhesion between aggregate and asphalt blinder is an important index to evaluate the anti-water damage ability,and it is also the foundation of the formation strength of asphalt mixture. This thesis discuss the properties of the interface adhesion between aggregate and asphalt blinder by the improved pull-out test and establish the relationship between the stability of the residual stability through the pull-out force loss rate and stripping rate. The results indicate that the improved pull-off test can effectively evaluate the adhesion between asphalt and stone,and limestone have better bonding properties and water stability than granite,and with the increase of temperature of stone,aggregate-asphalt absorption effect is better,this research has certain guiding significance to improve asphalt-stone adhesion and enhance the water damage resistant performance.