Clarifying the interface fusion effect will be helpful to guide the optimization design of cold-mixing recycled asphalt mixture more scientifically and reasonably. The diffusion coefficient increases by 64.3% with the increase of the content of rejuvenators after adding different rejuvenators into the new asphalt. Compared with Panjin 90# asphalt, the diffusion coefficient of Zhonghaiyou asphalt increases faster with the increase in temperature. Only a small part of the surface contact between old and new asphalt has been fused, which accords with the partial fusion theory. The degree of diffusion of new asphalt to old asphalt and the degree of diffusion of old asphalt to new asphalt are basically very similar however, there are some differences at different temperatures. The results showed that the diffusion model tends to be stable after 20 ps, and the degree of diffusion increases with the increase in temperature. In this paper, Materials Studio software was used to establish a bitumen model using the method of four components of bitumen, and then the rationality of the model was verified by density, solubility number and atomic radial distribution function, and the diffusion coefficient obtained from the mean square displacement ( MSD) was taken as its evaluation index. The interface fusion effect of old and new asphalt in plant mixing and cooling recycling mode is analyzed in order to improve the utilization rate of old asphalt in reclaimed asphalt pavement.
Radial distribution function materials studio how to#
With the emergence of a resource and energy crisis, how to make efficient use of rap has become the research focus of scientific researchers. Analysis of Interface Fusion Effect between Old and New Asphalt under Plant Mixing and Cold Recycling Mode Based on Molecular Dynamics Simulation Materials ( IF 3.057), Pub Date : , DOI: 10.3390/ma14164637 Peilei Zhou, Wensheng Wang, Zhe Yu Road construction consumes a lot of resources and produces a lot of waste and other pollutants.