Effects of resin coating and seawater immersion on mechanical performance of basalt textile reinforced seawater sea sand concrete

ZHU Deju; HUANG Wei; GUO Shuaicheng

doi:10.13801/j.cnki.fhclxb.20231129.001

Volume 41 Issue 8

Aug. 2024

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ZHU Deju, HUANG Wei, GUO Shuaicheng. Effects of resin coating and seawater immersion on mechanical performance of basalt textile reinforced seawater sea sand concrete[J]. Acta Materiae Compositae Sinica, 2024, 41(8): 4211-4224. doi: 10.13801/j.cnki.fhclxb.20231129.001

Citation:

ZHU Deju, HUANG Wei, GUO Shuaicheng. Effects of resin coating and seawater immersion on mechanical performance of basalt textile reinforced seawater sea sand concrete[J]. Acta Materiae Compositae Sinica, 2024, 41(8): 4211-4224. doi: 10.13801/j.cnki.fhclxb.20231129.001

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Effects of resin coating and seawater immersion on mechanical performance of basalt textile reinforced seawater sea sand concrete

doi: 10.13801/j.cnki.fhclxb.20231129.001

Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, China

Funds: National Natural Science Foundation of China-Shandong Joint Fund (U1806225)

Received Date: 2023-09-20
Accepted Date: 2023-11-21
Rev Recd Date: 2023-10-24

Available Online: 2023-11-29

Publish Date: 2024-08-01

Abstract

Abstract

In order to study the effects of different resin (epoxy resin, furan resin, vinyl resin) coatings and seawater immersion on the mechanical properties of basalt textile reinforced seawater sea sand concrete (BTR-SSC), a universal testing machine was used to perform static tensile tests on the fiber yarns of each resin coating and the BTR-SSC specimens immersed in seawater for different time, and the fiber-matrix interface bonding performance was evaluated by pull-out test. The crack and strain distribution were obtained by digital image correlation analysis, and the damage mechanism was analyzed by scanning electron microscopy. The long-term performance of the interface was evaluated by crack distribution and matrix strength through the calculation formula of interface bond strength. The results show that the reinforcing effects of the three resins on the fiber yarns are significant and similar (around 32%), which could significantly improve the mechanical properties of BTR-SSC. The vinyl resin coating had the best performance, and the tensile properties and interfacial bonding properties are increased by 77% and 180%, respectively. The mechanical properties of BTR-SSC specimens are significantly degraded under seawater immersion. The untreated specimens are brittle after 14 days of high temperature immersion. The tensile strength of epoxy resin, furan resin and vinyl resin coated specimens increase by 81%, 48% and 94% respectively after 7 days of immersion compared with untreated specimens. After 28 days of immersion, there are still multiple cracks developed, and the interfacial bonding properties are lost by 64%, 57% and 55%, respectively. The results will help to improve the long-term performance of BTR-SSC in the marine environment and promote its application in marine structures.
- textile reinforced concrete,
- seawater sea sand concrete,
- surface treatment,
- seawater immersion,
- mechanical performance
Long Abstrsct
Innovation Points

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References(30)

References

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