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活化废橡胶粉改性沥青的储存稳定性和流变性能增强

Enhanced Storage Stability and Rheological Properties of Asphalt Modified by Activated Waste Rubber Powder.

作者信息

Liu Weihong, Xu Yishen, Wang Hongjun, Shu Benan, Barbieri Diego Maria, Norambuena-Contreras Jose

机构信息

Jiangsu College of Engineering and Technology, Nantong 226007, China.

Foshan Transportation Science and Technology Co., Ltd., Foshan 528000, China.

出版信息

Materials (Basel). 2021 May 20;14(10):2693. doi: 10.3390/ma14102693.

DOI:10.3390/ma14102693
PMID:34065577
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8160994/
Abstract

Segregation of waste crumb rubber powder (WR) modified asphalt binders the large-scale application of WR in asphalt. The method of microwave activation combined with chemical activation (KMWR) was proposed to improve storage stability and rheological properties of WR modified asphalt in this work. Storage stability and rheological properties of virgin asphalt, MWR modified asphalt, and KMWR modified asphalt were comparatively studied by the standard segregation test, bending beam rheometer (BBR) test, and dynamic shear rheometer (DSR) test. The effect of composite activation on waste rubber powder particles was studied by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and Brunauer-Emmett-Teller (BET) tests. The main results showed that after the physical and chemical composite activation, the storage stability of waste rubber powder modified asphalt was significantly improved, WR modified asphalt had better crack resistance, better rutting resistance, and better fatigue performance. After physical and chemical activation, WR was desulfurized, and a large number of active groups was grafted on the WR particles.

摘要

废胶粉（WR）改性沥青的离析阻碍了WR在沥青中的大规模应用。本文提出了微波活化与化学活化相结合的方法（KMWR）来改善WR改性沥青的储存稳定性和流变性能。通过标准离析试验、弯曲梁流变仪（BBR）试验和动态剪切流变仪（DSR）试验，对基质沥青、微波辐射改性沥青和微波-化学复合改性沥青的储存稳定性和流变性能进行了对比研究。通过傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和布鲁诺尔-埃米特-泰勒（BET）试验研究了复合活化对废胶粉颗粒的影响。主要结果表明，经过物理和化学复合活化后，废胶粉改性沥青的储存稳定性显著提高，WR改性沥青具有更好的抗裂性、抗车辙性和疲劳性能。经过物理和化学活化后，WR发生脱硫反应，大量活性基团接枝在WR颗粒上。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/5158dbc2ea9d/materials-14-02693-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/541ebbd07af6/materials-14-02693-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/43e24b621133/materials-14-02693-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/1b681a1e3470/materials-14-02693-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/927602c2f5e2/materials-14-02693-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/f38ed1b83424/materials-14-02693-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/f11df878539a/materials-14-02693-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/4ba7a7a7593d/materials-14-02693-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/3cc52c3512ec/materials-14-02693-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/5158dbc2ea9d/materials-14-02693-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/541ebbd07af6/materials-14-02693-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/43e24b621133/materials-14-02693-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/1b681a1e3470/materials-14-02693-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/927602c2f5e2/materials-14-02693-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/f38ed1b83424/materials-14-02693-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/f11df878539a/materials-14-02693-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/4ba7a7a7593d/materials-14-02693-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/3cc52c3512ec/materials-14-02693-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0559/8160994/5158dbc2ea9d/materials-14-02693-g009.jpg

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