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Abstract：
Presently, there is a significant focus on the investigation and advancement of polymer-modified asphalt that is both high-performing and environmentally sustainable. This study thoroughly examined the performance and modification mechanism of gutta-percha (GP) as a novel asphalt modifier. The investigation was conducted using a combination of macro- and microscopic testing, as well as molecular dynamics simulations. This work primarily examined the compatibility of GP with asphalt molecular modeling. This paper used molecular dynamics to identify the most suitable mixing temperature. Next, the gray correlation theory was used to discuss the most effective method for preparing gutta-percha-modified asphalt (GPMA). The macro-rheological tests and microscopic performance analysis provided a full understanding of the impact of GP on asphalt properties and the process of alteration. The findings indicate that eucommia ulmoides gum (EUG) exhibits good compatibility with asphalt, while sulfur-vulcanized eucommia ulmoides gum (SEUG) does not demonstrate compatibility with asphalt. Both EUG and SEUG enhance the thermal stability and resistance to deformation of asphalt at high temperatures, with SEUG having a particularly notable effect. However, both additives do not improve the resistance of asphalt to cracking at low temperatures. The manufacturing method for EUG-modified asphalt (EUGMA) involves physical mixing, whereas sulfur-vulcanized eucommia ulmoides gum-modified asphalt (SEUGMA) involves physical mixing together with certain chemical processes. This research establishes a theoretical foundation for the advancement of GP as a novel environmentally friendly and highly effective asphalt modification.
摘要：
目前,对高性能和环境可持续的聚合物改性沥青的研究和发展具有重要意义。本研究全面考察了古塔胶（GP）作为一种新型沥青改性剂的性能和改性机理。调查采用宏观和微观测试相结合的方式进行，以及分子动力学模拟。这项工作主要研究了GP与沥青分子模型的相容性。本文利用分子动力学确定了最合适的混合温度。接下来,利用灰色关联理论探讨了制备古塔胶改性沥青(GPMA)最有效的方法。宏观流变试验和微观性能分析使人们对GP对沥青性能的影响和改变过程有了充分的了解。研究结果表明,杜仲胶(EUG)与沥青具有良好的相容性,硫磺硫化杜仲胶(SEUG)与沥青没有相容性。EUG和SEUG都增强了沥青在高温下的热稳定性和抗变形能力，SEUG具有特别显著的效果。然而,这两种添加剂都不能提高沥青在低温下的抗开裂性。EUG改性沥青（EUGMA）的制造方法涉及物理混合，而硫硫化杜仲胶改性沥青（SEUGMA）涉及物理混合和某些化学过程。本研究为GP作为一种新型环保高效沥青改性技术的发展奠定了理论基础。
