基于外加剂的沥青混合料高低温性能研究

发布时间：2018-04-22 03:22

  本文选题：沥青混合料 + 高温车辙　； 参考：《长安大学》2014年硕士论文

【摘要】：高温车辙和低温开裂病害作为沥青路面最常见的两种病害，会严重的影响沥青路面的服务质量，缩短沥青路面的使用寿命。针对这一问题，本论文提出通过在混合料中采用干法工艺掺入某一种或某几种外加剂，以达到同时大幅度提高其高温稳定性和低温抗裂性的目的。 本论文的研究思路如下：首先，确定沥青混合料高温性能最佳改性外加剂，并研究该改性剂掺量的变化对沥青混合料路用性能的影响，，以确定其最佳用量；其次，探究不同种类外加剂对沥青混合料低温性能的改性效果，以通过试验初步筛选出沥青混合料最佳低温改性剂；再次，研究第前两步中确定的两种改性剂双掺时对沥青混合料路用性能的改善效果；最后，对双掺外加剂的改性机理进行分析，并提出对沥青混合料高低温性能具有双改性效果的新材料的开发。 研究结果表明：将4‰的抗车辙剂与1.5%的橡维联同时掺入沥青混合料中，能够同时大幅度提高其高温稳定性和低温抗裂性，对其他的路用性能也有着一定的改善效果，显示出良好的应用前景。
[Abstract]:As the two most common diseases of asphalt pavement, high temperature rutting and low temperature cracking will seriously affect the service quality of asphalt pavement and shorten the service life of asphalt pavement. In order to improve the high temperature stability and the low temperature crack resistance of the mixture, the dry process is used to add some admixture or admixtures to the mixture in order to improve the high temperature stability and the crack resistance at low temperature. The research ideas of this paper are as follows: firstly, determine the best modified admixture for the high temperature performance of asphalt mixture, and study the influence of the content of the modifier on the pavement performance of asphalt mixture. To explore the modification effect of different admixtures on the low temperature performance of asphalt mixture in order to select the best low temperature modifier of asphalt mixture. The improvement effect of the two modifiers determined in the first two steps on the pavement performance of asphalt mixture is studied. Finally, the modification mechanism of the double admixture is analyzed. The development of new materials with high and low temperature performance of asphalt mixture with double modification effect is put forward. The results show that the high temperature stability and low temperature crack resistance of the asphalt mixture can be greatly improved by adding 4 鈥

本文编号：1785381