橡胶沥青施工阶段的双重反应特性研究综述

Research Reviews on Dual Reaction Characteristics of Rubber Asphalt in Construction Stage

综合国内外最新研究成果对橡胶沥青及其混合料施工阶段（生产、运输、摊铺、碾压）的双重反应展开了全面的分析,从老化反应以及交互反应两个主要方面分析了橡胶沥青施工阶段的双重反应机理,时间、温度、掺量等因素对橡胶沥青施工阶段双重反应的影响,简述了不同温拌技术对橡胶沥青结合料以及混合料施工阶段的改善效果,结果表明：时间、温度对橡胶沥青施工阶段双重反应的影响远大于掺量的影响,贮存时间应尽量缩短,最佳贮存温度应控制在140℃-150℃,而胶粉掺量不宜超过20%;3种温拌技术都可以显著降低混合料施工温度,Evotherm的降温效果最好,可达20℃-30℃,在掺量12%时对橡胶沥青混合料抗老化性能有一定改善,但效果不明显;Sasobit对混合料动稳定度提升最大,但对低温性能有一定影响,对高温性能影响不大;TOR可以改善胶粉颗粒与沥青相容性,提高橡胶沥青贮存稳定性,并且能够显著改善橡胶沥青高温黏度,提高高温以及低温性能。

Abstract： Based on the latest research results both in China and abroad comprehensive analysis is carried out in terms of the dual reaction of rubber asphalt and mixture in construction stage （production, transportation, paving, rolling）, and the dual reaction mechanism in rubber asphalt construction stage and the influence factor of the dual reaction mechanism （such as time, temperature, dosage） from two main aspects of aging reaction and interaction are analyzed. The improved effects of the different warm mixing technology are summarized to the rubber asphalt binder and the mixture construction stage. The results show that time and temperature have a larger impact on dual reaction of rubber asphalt construction phase than that of adding volume, and the storage time should be as short as possible, and the optimum storage temperature should be controlled at 140 degrees to 150 degrees, while the powder dosage should not exceed20%; all three kinds of the warm mix technique can significantly reduce the mixture construction temperature, the best cooling effect is Evotherm which can reach 20℃ - 30℃, and 12% dosage can improve the aging of rubber asphalt mixture performance, but the effect is not obvious; Sasobit can lead a maximum increasing on dynamic stab!lity of mixture, and a certain influence on the low temperature performance, but little influence on high temperature performance; Tor can improve the compatibility of rubber powder particles and asphalt, and the storage stability of rubber asphalt, also significantly improve the high temperature viscosity of the rubber asphalt and the performance of a high or low temperature.