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硅橡胶对沥青结合料流变性能和老化特性的影响

Effects of Silicone Rubber on Rheological Properties and Aging Characteristics of Asphalt Binder.

作者信息

Li Maoqing, Gao Zichen, He Zewen, Ma Jiachen, Zhao Wenhui, Dang Shihao, Wei Chenhao

机构信息

Shaanxi Coal Chemical Industry Technology Research Institute Co., Ltd., Xi'an 710100, China.

Tianjin Transportation Research Institute, Tianjin 300060, China.

出版信息

Polymers (Basel). 2024 Jul 2;16(13):1903. doi: 10.3390/polym16131903.

DOI:10.3390/polym16131903
PMID:39000758
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11244462/
Abstract

Silicone rubber (SR) is a kind of polymer insulation material with excellent performance. With the service life of silicone rubber products reaching the limit, how to dispose of waste silicone rubber is an urgent problem to be solved. In this paper, silicone rubber-modified asphalt binder (SRMA) was prepared by SR and 90# base asphalt binder. The simulated short-term aging and long-term aging tests of SRMA were carried out using the thin film oven aging test (TFOT) and pressure aging vessel test (PAV). The rotary viscosity test and dynamic shear rheological test (DSR) were applied to the rheological properties of SRMA before and after aging. The degradation degree and chemical composition changes of SR were explored by the toluene insoluble matter test, Fourier transform infrared spectroscopy (FTIR), and a Fluorescence microscope (FM). The results demonstrate that SR can significantly affect the aging resistance, fatigue life, and high-temperature stability of SRMA. As the content of SR rose, the elastic component in SRMA increased, leading to a nice performance in stability at high temperatures and fatigue resistance. However, excessive content (14%wt and 16%wt) had a negative influence on the performance of SRMA. So, the optimal content was speculated to be between 12% and 14%. Furthermore, SR and asphalt binder would be aged and degraded together in the aging process, and this phenomenon was more obvious during long-term aging.

摘要

硅橡胶（SR）是一种性能优异的聚合物绝缘材料。随着硅橡胶制品使用寿命达到极限，如何处理废弃硅橡胶成为亟待解决的问题。本文采用SR与90#基质沥青制备了硅橡胶改性沥青结合料（SRMA）。利用薄膜烘箱老化试验（TFOT）和压力老化容器试验（PAV）对SRMA进行了模拟短期老化和长期老化试验。采用旋转粘度试验和动态剪切流变试验（DSR）研究了老化前后SRMA的流变性能。通过甲苯不溶物试验、傅里叶变换红外光谱（FTIR）和荧光显微镜（FM）探究了SR的降解程度和化学组成变化。结果表明，SR能显著影响SRMA的抗老化性能、疲劳寿命和高温稳定性。随着SR含量的增加，SRMA中的弹性成分增加，使其高温稳定性和抗疲劳性能良好。然而，过量的含量（14%wt和16%wt）对SRMA的性能有负面影响。因此，推测最佳含量在12%至14%之间。此外，SR与沥青结合料在老化过程中会一起老化降解，且这种现象在长期老化过程中更为明显。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/6a32bd7602b5/polymers-16-01903-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/7534339b1abc/polymers-16-01903-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/ce068c69ca0b/polymers-16-01903-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/6a32bd7602b5/polymers-16-01903-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/707b1ef99a7e/polymers-16-01903-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/7534339b1abc/polymers-16-01903-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/ce068c69ca0b/polymers-16-01903-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/12ae22164cea/polymers-16-01903-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/c74e3e70ab47/polymers-16-01903-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/35d7f8314ddf/polymers-16-01903-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/e40c0539f035/polymers-16-01903-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/861b/11244462/6a32bd7602b5/polymers-16-01903-g013.jpg

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