Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites
Premature debonding failure is a critical problem in the reinforcement of concrete structures using fiber reinforced polymer (FRP) sheets with externally bonded reinforcement (EBR) technique. The usual anchoring methods are likely to cause damage to the concrete. The effect of incorporating various...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523003960 |
| _version_ | 1797798863193505792 |
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| author | Changchun Shi Shengji Jin Kanhui Jin Yuhao Yang Li Xu |
| author_facet | Changchun Shi Shengji Jin Kanhui Jin Yuhao Yang Li Xu |
| author_sort | Changchun Shi |
| collection | DOAJ |
| description | Premature debonding failure is a critical problem in the reinforcement of concrete structures using fiber reinforced polymer (FRP) sheets with externally bonded reinforcement (EBR) technique. The usual anchoring methods are likely to cause damage to the concrete. The effect of incorporating various amounts of carboxyl (COOH)-functionalized MWCNTs in the epoxy resin on the bonding behavior of the basalt fiber-reinforced polymer (BFRP)-concrete joints was detailed studied by single-shear tests and the digital image correlation (DIC) technique. Experimental results indicated that adding the functionalized MWCNTs into the epoxy considerably enhanced the bonding properties. In comparison with the BFRP-concrete joints using neat epoxy, the effective bond length, bond strength, ultimate global slip, interface fracture energy, and BFRP strain of the BFRP-concrete joints using 0.8 wt% MWCNTs modified epoxy increased by 96 %, 55 %, 39 %, 172 %, and 114 %, respectively. The scanning electron microscope (SEM) images of debonded BFRP surface revealed that the MWCNTs could penetrate into concrete along with epoxy resin, and the MWCNTs pull-out and crack-bridging could indicate a reinforcing effect to prevent premature adhesive failure. This study demonstrated the great promise of the MWCNTs modified epoxy composites toward practical engineering application in reinforced concrete (RC) structures. Data availability statement: The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study. |
| first_indexed | 2024-03-13T04:10:57Z |
| format | Article |
| id | doaj.art-3552107962764caf9929d4c8d8358c41 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:10:57Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-3552107962764caf9929d4c8d8358c412023-06-21T06:54:56ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02216Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy compositesChangchun Shi0Shengji Jin1Kanhui Jin2Yuhao Yang3Li Xu4School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China; Department of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou, Hebei 061001, ChinaSchool of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China; Corresponding author.Department of Civil Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou, Hebei 061001, ChinaSchool of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, ChinaPremature debonding failure is a critical problem in the reinforcement of concrete structures using fiber reinforced polymer (FRP) sheets with externally bonded reinforcement (EBR) technique. The usual anchoring methods are likely to cause damage to the concrete. The effect of incorporating various amounts of carboxyl (COOH)-functionalized MWCNTs in the epoxy resin on the bonding behavior of the basalt fiber-reinforced polymer (BFRP)-concrete joints was detailed studied by single-shear tests and the digital image correlation (DIC) technique. Experimental results indicated that adding the functionalized MWCNTs into the epoxy considerably enhanced the bonding properties. In comparison with the BFRP-concrete joints using neat epoxy, the effective bond length, bond strength, ultimate global slip, interface fracture energy, and BFRP strain of the BFRP-concrete joints using 0.8 wt% MWCNTs modified epoxy increased by 96 %, 55 %, 39 %, 172 %, and 114 %, respectively. The scanning electron microscope (SEM) images of debonded BFRP surface revealed that the MWCNTs could penetrate into concrete along with epoxy resin, and the MWCNTs pull-out and crack-bridging could indicate a reinforcing effect to prevent premature adhesive failure. This study demonstrated the great promise of the MWCNTs modified epoxy composites toward practical engineering application in reinforced concrete (RC) structures. Data availability statement: The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.http://www.sciencedirect.com/science/article/pii/S2214509523003960Bonding propertyMulti-wall carbon nanotubesEpoxy resinConcreteFRP sheetResin-reinforced cement composite |
| spellingShingle | Changchun Shi Shengji Jin Kanhui Jin Yuhao Yang Li Xu Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites Case Studies in Construction Materials Bonding property Multi-wall carbon nanotubes Epoxy resin Concrete FRP sheet Resin-reinforced cement composite |
| title | Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites |
| title_full | Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites |
| title_fullStr | Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites |
| title_full_unstemmed | Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites |
| title_short | Improving bonding behavior between basalt fiber-reinforced polymer sheets and concrete using multi-wall carbon nanotubes modified epoxy composites |
| title_sort | improving bonding behavior between basalt fiber reinforced polymer sheets and concrete using multi wall carbon nanotubes modified epoxy composites |
| topic | Bonding property Multi-wall carbon nanotubes Epoxy resin Concrete FRP sheet Resin-reinforced cement composite |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523003960 |
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