Proposing a new infrared index quantifying the aging extent of SBS-modified asphalt
Proposing a new infrared index quantifying the aging extent of SBS-modified asphalt
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DOI：
10.1080/14680629.2017.1318082
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发表时间：
2018-01-01
影响因子：
3.7
通讯作者：
Li, Yanwei
中科院分区：
文献类型：
--
作者：
Yan, Chuanqi;Huang, Weidong;Li, Yanwei
利用衰减全反射（ATR）傅里叶变换红外光谱定量评价SBS改性沥青（SBSMA）老化程度的研究较多。然而，目前使用的SBS特征指标大多仅代表SBS在SBSMA内的浓度，并且由于SBS与沥青的相容性较差，在老化过程中可能会出现波动。本文提出了用聚丁二烯红外峰强度除以聚苯乙烯红外峰强度计算SBS/SBSMA老化程度的新指标。并通过ATR观测和流变主曲线验证了不同老化条件下应用的可行性。结果表明，传统的SBS特征指标在老化过程中会受到SBS粒径变化的影响，但不受SBS浓度变化的影响，能准确反映SBS/SBSMA老化的严重程度。此外，SBS用量、SBS改性剂类型及老化过程均不影响其可行性。
Abundant studies are using Attenuated Total Reflection (ATR) Fourier Transform infrared spectroscopy to quantitatively evaluate the aging extent of Styrene-Butadiene-Styrene (SBS)-modified asphalt (SBSMA). However, most currently employed SBS characteristic indexes merely represent the SBS concentration within SBSMA and may fluctuate during aging because of the poor compatibility between SBS and bitumen. In this study, a new index calculated by dividing polybutadiene infrared peak intensity by polystyrene infrared peak intensity was proposed to show the aging extent of SBS/SBSMA. And the application feasibility under various aging conditions was examined via ATR observation and rheology master curves. Results indicated that traditional SBS characteristic indexes could be influenced by possible SBS particle size variation during aging while was independent of SBS concentration change and accurately represented the SBS/SBSMA aging severity. Besides, the feasibility was not affected by different SBS dosages, SBS modifier types or aging procedures.