Zhang Xiaorui, Han Chao, Yang Jun, Xu Xinquan, Zhang Fan
School of Transportation, Southeast University, Nanjing 211189, China.
Guangdong Hualu Transportation Technology Co., Ltd., Guangzhou 510420, China.
Materials (Basel). 2021 Dec 14;14(24):7727. doi: 10.3390/ma14247727.
With the increasing traffic loading and changing climatic conditions, there is a need to use novel superior performing pavement materials such as high-modulus asphalt binders and asphalt mixtures to mitigate field distress such as rutting, cracking, etc. This laboratory study was thus conducted to explore and substantiate the usage of Rubber Polymer Composite Modifier (RPCM) for high-modulus asphalt binder modification. The base asphalt binder used in the study comprised A-70# Petroleum asphalt binder with RPCM dosages of 0.25%, 0.30%, 0.35%, 0.40% and 0.45%, separately. The laboratory tests conducted for characterizing the asphalt binder rheological and morphological properties included the dynamic mechanical analysis (DM), temperature-frequency sweep in the dynamic shear rheometer (DSR) device, bending beam rheometer (BBR), and florescence microscopic (FM) imaging. The corresponding test results exhibited satisfactory compatibility and potential for using RPCM as a high-modulus asphalt binder modifier to enhance the base asphalt binder's rheological properties, both with respect to high- and low-temperature performance improvements. For the A-70# Petroleum asphalt binder that was evaluated, the optimum RPCM dosage was found to be 0.30-0.35%. In comparison to styrene-butadiene-styrene (SBS), asphalt binder modification with RPCM exhibited superior high-temperature rutting resistance properties (as measured in terms of the complex modulus and phase angle) and vice versa for the low-temperature cracking properties. Overall, the study beneficially contributes to the literature through provision of a reference datum toward the exploratory usage of RPCM for high-modulus asphalt binder modification and performance enhancements.
随着交通荷载的增加和气候条件的变化，需要使用新型高性能路面材料，如高模量沥青结合料和沥青混合料，以减轻车辙、开裂等现场病害。因此，开展了这项室内研究，以探索和证实橡胶聚合物复合改性剂（RPCM）用于高模量沥青结合料改性的可行性。本研究中使用的基础沥青结合料为A-70#石油沥青结合料，分别添加了0.25%、0.30%、0.35%、0.40%和0.45%的RPCM。为表征沥青结合料的流变和形态特性而进行的室内试验包括动态力学分析（DM）、动态剪切流变仪（DSR）中的温度-频率扫描、弯曲梁流变仪（BBR）和荧光显微镜（FM）成像。相应的试验结果表明，RPCM作为高模量沥青结合料改性剂具有良好的相容性和潜力，能够提高基础沥青结合料的流变性能，包括高温和低温性能。对于所评估的A-70#石油沥青结合料，发现RPCM最佳用量为0.30-0.35%。与苯乙烯-丁二烯-苯乙烯（SBS）相比，用RPCM改性的沥青结合料表现出优异的高温抗车辙性能（以复数模量和相角衡量），而在低温抗裂性能方面则相反。总体而言，该研究通过提供关于RPCM用于高模量沥青结合料改性和性能增强的探索性使用的参考数据，对相关文献做出了有益贡献。
