基于表观黏度的新疆岩沥青改性沥青的老化动力性能研究

本文通过室内模拟老化试验,探究了不同老化条件下基质沥青和新疆岩沥青改性沥青表观黏度的变化规律,以黏度为参数建立了老化动力学模型,求得老化反应活化能和老化反应总速率等动力学参数。研究表明：短期老化过程中两种沥青的表观黏度呈指数增长；改性沥青具有更低的反应速率和更高的活化能；所建立模型的计算值与实测值相关性较高；能够准确的表征新疆岩沥青改性沥青和基质沥青老化过程中表观黏度的变化规律。

Aging Kinetic of Xinjiang Rock-modified Asphalt Based on Apparent Viscosity

: In this article, by simulating indoor simulated aging test, matrix asphalt and xinjiang rock-modified asphalt were conducted respectively at different time and temperatures, the changing regularity of two difference asphalt dynamic viscosity were explored. By taking dynamic viscosity of asphalt as the parameter to establish ageing kinetics models, the ageing reaction activation energies and reactions constants were calculated. Researching indicates that two asphalts dynamic viscosity are similar to exponential growth with the ageing temperatures and time, but rock-modified has a lower reaction rating and higher activation energies. Ageing kinetics models calculating values and measuring values has a well correlation, which can be used to accurate representation the dynamic viscosity changing in aging processes of matrix asphalt and rock-modified asphalt.