基于废旧沥青混合料的再生沥青路用性能研究

Research on Regeneration Asphalt Pavement Performance Based on Waste Asphalt Mixture

为了科学合理地评价再生沥青的路用性能,根据规范测得再生沥青、90号沥青和老化沥青5℃、15℃、25℃的针入度,建立沥青针入度对数lgP和温度T的一元线性回归方程,并计算出三种沥青的针入度指数PI、当量软化点、当量脆点等。其中再生沥青感温性能、高温稳定性能和低温抗裂性能均优于90号沥青和老化沥青,而沥青老化会导致沥青的感温性能增强、高温稳定性能和低温抗裂性能降低,这说明再生沥青具有良好的路用性能。

In order to scientifically and reasonably evaluate the road performance of regeneration asphalt,we measured the penetration degree of regeneration asphalt, 90# asphalt and aged asphalt at 5 ℃, 15 ℃, 25℃ according to the specification, then established asphalt penetration logarithmic lgP and unary linear regression equation of the temperature T, and calculated the three kinds of asphalt penetration index, equivalent softening point, equivalent brittle point, etc. The thermal performance, high-temperature stability and low-temperature anti-cracking performance regeneration asphalt is better than that of 90# asphalt and aged asphalt. Because of the asphalt aging enhance thermal performance and reduce high temperature stability and low temperature crack resistance, so this declare that the regeneration asphalt has good road performance.