Study on Water Damage of Asphalt-aggregate Interface Based on Molecular Dynamics
In order to explore the water damage characteristics of asphalt-aggregate interface,the indoor pull-out test based on freeze-thaw cycle was carried out firstly.Secondly,the water damage model of as-phalt-aggregate interface is constructed and molecular dynamics simulation is carried out.The results show that the pull-out strength of asphalt-aggregate interface decreases with the increase of freeze-thaw cycles,and the decrease decreases with the increase of freeze-thaw cycles,and finally tends to be gentle.The adhesion of rubber asphalt is better than that of matrix asphalt,and the adhesion of alkaline aggregate to asphalt is better than that of acidic aggregate.As the degree of water damage continues to deepen,more and more wa-ter molecules replace asphalt molecules to adsorb on the surface of the aggregate,the interface energy be-tween the asphalt aggregate decreases,and the bonding performance between the asphalt and the aggregate decreases.
molecular dynamicsbituminous mixturewater damagepull-out piece spring strength
万方数据
维普
