以正戊烷沥青质含量为参数的温拌沥青老化动力学研究

he aging tests of warm mix asphalt and matrix asphalt are conducted at different temperatures and time, and the contents of n-pentane asphaltene of aged asphalts are measured. By taking the content of n-pentane asphaltene as the parameter, the aging kinetics models are established for the two asphalts, and the reaction constants and reaction activation energies are calculated. It is indicated that the aging process of the two asphalts follows the first-order kinetics reaction equation, and the content of n-pentane asphaltene increases with the aging temperature and aging time. The reaction constant of warm mix asphalt is lower, but the reaction activation energy is bigger than matrix asphalt, that is to say the anti-aging property of warm mix asphalt is better. The aging kinetics models based on the content of n-pentane asphaltene could be used to distinguish the different aging processes of warm mix asphalt and matrix asphalt well.