The aggravation of scrap tires in landfills has negative impacts on human life and the surrounding environment. Therefore, many studies have been conducted to recycle and reuse scrap tires in other areas. One such area is the asphalt pavement, where the crumb rubber (CR) from scrap tires are recycled for asphalt modification. This study focuses on improving the coating properties, and moisture resistance of the rubberized asphalt materials, with the proposed chemical soaking pre-treatment methods. The Fourier transform infrared (FTIR) spectroscopy results revealed significant changes in the CR surface chemistry after pre-treatments, involving the reduction and oxidation of chemical bonds. There was a decrease in the C-H functional group when treated by heating in distilled water and soaking in a potassium permanganate solution. In addition, the intensity of the peaks related to the ether functional group increased when soaking in a potassium permanganate solution. It was further found that the pre-treatment methods enhanced the coating properties of rubberized asphalt mixtures. Meanwhile, the pre-treatment efficacy was notably affected by the binder type. This study demonstrated substantial improvements in the moisture resistance of rubberized asphalt materials following the proposed chemical CR pre-treatment.

中文翻译：

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化学预处理对碎橡胶对橡胶涂覆性能的影响


垃圾填埋场中废旧轮胎的恶化对人类生活和周围环境产生了负面影响。因此，已经进行了许多研究以在其他领域回收和再利用废旧轮胎。其中一个区域是沥青路面，废旧轮胎中的碎橡胶 （CR） 被回收用于沥青改性。本研究的重点是通过提出的化学浸泡预处理方法改善橡胶沥青材料的涂层性能和耐湿性。傅里叶变换红外 （FTIR） 光谱结果显示，预处理后 CR 表面化学发生了显着变化，涉及化学键的还原和氧化。在蒸馏水中加热并浸泡在高锰酸钾溶液中时，C-H 官能团减少。此外，当浸泡在高锰酸钾溶液中时，与醚官能团相关的峰的强度增加。进一步发现，预处理方法增强了橡胶沥青混合料的涂层性能。同时，处理前疗效受粘合剂类型显着影响。这项研究表明，在拟议的化学 CR 预处理后，橡胶沥青材料的防潮性有了显着改善。