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双螺杆活化橡胶粉复合SBS改性沥青的流变性能及影响机制

Rheological Properties and Influence Mechanisms of Twin-Screw Activated Rubber Powder Composite SBS-Modified Asphalt.

作者信息

Zhao Yicai, Dong Rui, Zhao Jingzhuo, Wang Yongning, Guo Fucheng, Wei Xiaolong, Li Bo, Huang Yong

机构信息

Gansu Transportation Investment Management Co., Ltd., Lanzhou 730030, China.

Gansu Provincial Transportation Planning Survey and Design Institute Co., Ltd., Lanzhou 730030, China.

出版信息

Materials (Basel). 2025 May 19;18(10):2359. doi: 10.3390/ma18102359.

DOI:10.3390/ma18102359
PMID:40429099
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12112826/
Abstract

To investigate the rheological properties and influence mechanisms of twin-screw activated rubber composite-modified asphalt, we used SBS-modified asphalt (SBS) as the reference. Raw rubber powder composite-modified asphalt (RA/SBS) and activated rubber composite-modified asphalt (ARA/SBS) were prepared. A dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were employed to comparatively analyze the rheological characteristics of the three modified asphalts, while Fourier transform infrared spectroscopy (FTIR) and fluorescence microscopy were used to reveal the micro-mechanisms in ARA/SBS. The results showed that ARA/SBS exhibited better storage stability and low-temperature flexibility compared to SBS and RA/SBS, and ARA/SBS demonstrated lower viscosity than RA/SBS. Among the three, ARA/SBS showed significantly improved high-temperature performance. The comparison of creep stiffness S and creep rate m indicated optimal performance in ARA/SBS, confirming that twin-screw activated rubber powder could significantly enhance the low-temperature properties of modified asphalt. Microscopically, chemical reactions occurred between oxygen-containing functional groups in activated rubber and polar groups in asphalt, while a cross-linked network structure formed between activated rubber molecules and asphalt molecular chains, improving compatibility and enhancing the rheological properties of composite modified asphalt.

摘要

为研究双螺杆活化橡胶粉复合改性沥青的流变性能及影响机理，我们采用SBS改性沥青（SBS）作为参照。制备了生橡胶粉复合改性沥青（RA/SBS）和活化橡胶粉复合改性沥青（ARA/SBS）。采用动态剪切流变仪（DSR）和弯曲梁流变仪（BBR）对三种改性沥青的流变特性进行对比分析，同时利用傅里叶变换红外光谱（FTIR）和荧光显微镜揭示ARA/SBS中的微观机理。结果表明，与SBS和RA/SBS相比，ARA/SBS具有更好的储存稳定性和低温柔韧性，且ARA/SBS的粘度低于RA/SBS。在这三种改性沥青中，ARA/SBS的高温性能有显著提升。蠕变劲度S和蠕变速率m的对比表明ARA/SBS性能最佳，证实双螺杆活化橡胶粉可显著提高改性沥青的低温性能。微观上，活化橡胶中的含氧官能团与沥青中的极性基团之间发生化学反应，同时活化橡胶分子与沥青分子链之间形成交联网络结构，改善了相容性，增强了复合改性沥青的流变性能。

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本文引用的文献

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Effect of styrene butadiene styrene and desulfurized rubber powder on asphalt modification: Preparation, performance enhancement, mechanism analysis.苯乙烯-丁二烯-苯乙烯嵌段共聚物和脱硫胶粉对沥青改性的影响：制备、性能增强及机理分析
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Swelled Mechanism of Crumb Rubber and Technical Properties of Crumb Rubber Modified Bitumen.胶粉的膨胀机理及胶粉改性沥青的技术性能
Materials (Basel). 2022 Nov 11;15(22):7987. doi: 10.3390/ma15227987.
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Comparison of microscopic techniques to study the diversity of the bitumen microstructure.
比较微观技术研究沥青微观结构多样性。
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Study on Storage Stability of Activated Reclaimed Rubber Powder Modified Asphalt.活化再生胶粉改性沥青储存稳定性研究
Materials (Basel). 2021 Aug 19;14(16):4684. doi: 10.3390/ma14164684.
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The Effect of Activation Method of Rubber on the Performance of Modified Asphalt Binder.橡胶活化方法对改性沥青性能的影响
Materials (Basel). 2020 Aug 20;13(17):3679. doi: 10.3390/ma13173679.
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Investigation on Rheological Properties and Storage Stability of Modified Asphalt Based on the Grafting Activation of Crumb Rubber.基于胶粉接枝活化的改性沥青流变性能及储存稳定性研究
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