Analysis of self-healing mechanism of different asphalt molecules based on molecular dynamics
In order to investigate the self-healing performance of asphalt materials,this paper establi-shes three-dimensional microcrack models of matrix asphalt,styrene-butadiene-styrene(SBS)modified asphalt,aged asphalt and aged SBS modified asphalt based on molecular dynamics simulations using Materials Studio software,and analyzes the healing of the self-healing models by density analysis,relative concentration distribution and free volume fraction.The results show that SBS modifier has a certain promotion effect on the self-healing of asphalt,aging has a certain inhibition effect on the self-healing of asphalt,and the self-healing potential of the four asphalts are SBS modified asphalt,matrix asphalt,aged SBS modified asphalt and aged asphalt in descending order.
万方数据
维普
