高模量沥青改性剂对沥青粘结料性能影响研究

Study on the Effect of High Modulus Asphalt Modifier on Properties of Asphalt Binder

摘要: 通过添加高模量添加剂改善道路沥青路面抗车辙等路面性能是目前道路建设中普遍采用的方法，高模量沥青改性剂的作用主要是改善了沥青粘结料的性能进而达到改善沥青混合料的相关性能，但是有关高模量添加剂对沥青粘结料性能的影响研究不多，更多的研究是添加剂对沥青混合料性能的影响研究。本研究对目前工程使用的两种高模量沥青改性剂对沥青粘结料性能的影响进行了探讨，通过沥青粘结料性能的变化可以预测高模量沥青改性剂的作用，为高模量沥青改性剂的优化提供基础。研究表明：添加高模量添加剂后，调合沥青针入度随添加比例提高而降低、对应的软化点逐渐升高、76℃下沥青的粘度提高，对混合沥青135℃的粘度影响不大、高模量添加剂的掺兑降低了混合沥青的粘韧性，混合沥青的延度也随之降低，感温性能(针入度指数)有一定程度改善。

Abstract: It is the commonly used technology by adding High Modulus Asphalt Modifier to improve the pro- perties of modified asphalt in road construction. The main function of high modulus asphalt mod-ifier is to improve the performance of asphalt concrete by improving the properties of asphalt binder. There was a little research about the High Modulus Asphalt Modifier effect on the properties of asphalt binder; more research is about the performance of asphalt concrete. It is necessary to predict the effect of high modulus asphalt modifier on the properties of asphalt binder. The effect of high modulus asphalt modifier on the properties of asphalt binder was studied in the paper. The experimental results show that as the high modulus modifier adding ratio is increased, the penetration of the blending asphalt, softening point, and the viscosity of the asphalt at 76˚C increase, and there is little change about viscosity at 135˚C. Adding the high modulus asphalt modifier reduces the toughness of asphalt mixture and the ductility, and improves the penetration index of the asphalt.