ABSTRACT

Improving the characteristics of bitumen emulsion is among important methods for the enhancement of cold asphalt mixture properties. Thus the researchers usually focus on different additives, polymers and also manufacturing methods to improve the quality of bitumen emulsion. Accordingly, in this study, the characteristics of different bitumen emulsions modified by Styrene–Butadiene Rubber (SBR) latex using various manufacturing techniques including co-milling, soap pre-batching and post-blending were investigated. Actually, the design procedure to optimise manufacturing of Polymer Modified Bitumen Emulsion (PMBE) was determined for modified cold mix asphalt using two emulsifiers. The results of basic tests, Linear Amplitude Sweep test (LAS) at moderate temperatures, Multiple Stress Creep Recovery (MSCR) at high temperatures and some traditional tests showed that each type of emulsifier had different behaviours in each method of polymer modification. In fact, the process of selecting suitable emulsifier and manufacturing method of PMBE enhanced rutting resistance at high temperature (MSCR), fatigue resistance at moderate temperature (LAS) and other physical properties. The findings indicated that the results of MQ3 samples were better than CECA samples in the most important parameters. Totally, co-milling in CECA emulsifier and soap pre-batching in MQ3 emulsifier also resulted in the best performance in physical properties, fatigue performance and rutting resistance.

摘要

改善沥青乳液的特性是提高冷沥青混合料性能的重要方法之一。因此，研究人员通常专注于不同的添加剂、聚合物以及制造方法，以提高沥青乳液的质量。因此，在本研究中，研究了由丁苯橡胶 (SBR) 胶乳使用各种制造技术（包括共研磨、皂预配料和后混合）改性的不同沥青乳液的特性。实际上，优化聚合物改性沥青乳液 (PMBE) 制造的设计程序是针对使用两种乳化剂的改性冷拌沥青确定的。基本测试的结果，中等温度下的线性幅度扫描测试 (LAS)，高温下的多重应力蠕变恢复 (MSCR) 和一些传统测试表明，每种类型的乳化剂在每种聚合物改性方法中都有不同的行为。事实上，选择合适的乳化剂的过程和PMBE的制造方法增强了高温车辙抗性（MSCR）、中温抗疲劳性（LAS）等物理性能。研究结果表明，MQ3 样品的结果在最重要的参数上优于 CECA 样品。总体而言，CECA 乳化剂中的共研磨和 MQ3 乳化剂中的皂预配料也导致物理性能、疲劳性能和车辙抗性的最佳性能。选择合适的乳化剂的过程和PMBE的制造方法增强了高温车辙抗性（MSCR）、中温抗疲劳性（LAS）等物理性能。研究结果表明，MQ3 样品的结果在最重要的参数上优于 CECA 样品。总体而言，CECA 乳化剂中的共研磨和 MQ3 乳化剂中的皂预配料也导致物理性能、疲劳性能和车辙抗性的最佳性能。选择合适的乳化剂的过程和PMBE的制造方法增强了高温车辙抗性（MSCR）、中温抗疲劳性（LAS）等物理性能。研究结果表明，MQ3 样品的结果在最重要的参数上优于 CECA 样品。总体而言，CECA 乳化剂中的共研磨和 MQ3 乳化剂中的皂预配料也导致物理性能、疲劳性能和车辙抗性的最佳性能。