Maciejewski Krzysztof, Chomicz-Kowalska Anna
Department of Transportation Engineering, Faculty of Civil Engineering and Architecture, Kielce University of Technology, Al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland.
Materials (Basel). 2021 Apr 19;14(8):2055. doi: 10.3390/ma14082055.
This study explores the effects of foaming on three selected bituminous binders: 50/70 paving grade bitumen, 45/80-55 polymer modified bitumen and 45/80-80 HiMA binder. The first part of the investigations included the evaluation of the foaming performance in terms of foaming temperature and foaming water content with the utilization of desirability functions and based on the equality of maximum expansion ratio and bitumen foam half-life. The second part of the study investigated the effects of foaming on the chemical structure of the binders using Fourier-transform infrared spectroscopy. The results of the spectroscopic measurements permitted calculation of structural indices specific to functional groups associated with bitumen oxidation, as well as those indicative of elastomeric modification. The results have shown that the different types of bitumen exhibited different foaming characteristics, which was most evident in bitumen foam half-lives, with the HiMA binder performing the best. The spectrometric measurements did not show any significant effects of foaming on the chemical structure of the evaluated binders related to oxidative stress, neither were any major changes in the PmB-specific regions found.
50/70 道路石油沥青、45/80 - 55 聚合物改性沥青和 45/80 - 80 高模量沥青（HiMA 结合料）。研究的第一部分包括利用期望函数，基于最大膨胀率和沥青泡沫半衰期相等，从发泡温度和发泡含水量方面评估发泡性能。研究的第二部分使用傅里叶变换红外光谱研究了发泡对结合料化学结构的影响。光谱测量结果允许计算与沥青氧化相关的官能团特定的结构指数，以及那些表明弹性体改性的指数。结果表明，不同类型的沥青表现出不同的发泡特性，这在沥青泡沫半衰期方面最为明显，其中 HiMA 结合料表现最佳。光谱测量未显示发泡对评估结合料与氧化应激相关的化学结构有任何显著影响，在聚合物改性沥青（PmB）特定区域也未发现任何重大变化。
