Durability of Basalt Rebars under Alkaline Environment

Abstract:

Basalt Fibre Reinforced Polymer (BRRP) is a new composite material made from basalt fibre, and resin matrix. It has been introduced to replace steel rebars as the main component of reinforced concrete structures because of their corrosion resistance under aggressive environments. This study investigates the mechanical properties of BFRP and the degradation state exposed to the alkaline environment and compares the corrosion rate with steel rebars. The flexural strength properties are tested as the parameter of mechanical properties. The results show that the flexural strength of BFRP is affected by immersion time (100h, 500h, 1000h) significantly. SEM results show mechanism of corrosion state that cracked resin matrix occurred and EDS results indicate the percentage components especially silicon elements that detected increased after corroded. This research identifies a current knowledge gap and can be serve as a reference point for further studies on the properties of BFRP bars to replace steel bars for safe and economic reinforced concrete structures in alkaline environments.

• Periodical: Construction Technologies and Architecture (Volume 4)
• Pages: 35-45
• DOI: https://doi.org/10.4028/p-hr94qc
• Online since: March 2023
• Authors: Leong Yee Foon, Rokiah Binti Othman*, Ramadhansyah Putra Jaya, Mohd Arif Sulaiman, Youventharan Duraisamy
• Keywords: Basalt Fibre Reinforced Polymer, Corrosion, Damage Mechanism, Degradation Rate, Flexural Strength

References

[1] Verma, S. K., Bhadauria, S. S., & Akhtar, S. (2014). Monitoring corrosion of steel bars in reinforced concrete structures. The scientific world journal, 2014.

DOI: 10.1155/2014/957904

[2] Fang, C., Lundgren, K., Chen, L., & Zhu, C. (2004). Corrosion influence on bond in reinforced concrete. Cement and concrete research, 34(11), 2159-2167.

DOI: 10.1016/j.cemconres.2004.04.006

[3] Wu, G., Dong, Z. Q., Wang, X., Zhu, Y., & Wu, Z. S. (2015). Prediction of long-term performance and durability of BFRP bars under the combined effect of sustained load and corrosive solutions. Journal of Composites for Construction, 19(3), 04014058.

DOI: 10.1061/(asce)cc.1943-5614.0000517

[4] ACI Committee 440. (2012). ACI 440.3R–12: Guide test methods for fiber–reinforced polymer (FRP) composites for reinforcing or strengthening concrete and masonry structures. American Concrete Institute.

DOI: 10.14359/51663675

[5] ASTM. (2009). Standard test method for flexural properties of fiber reinforced pultruded plastic rods.

DOI: 10.1520/d4476_d4476m

[6] Williamson, J., & Isgor, O. B. (2016). The effect of simulated concrete pore solution composition and chlorides on the electronic properties of passive films on carbon steel rebar. Corrosion Science, 106, 82-95.

DOI: 10.1016/j.corsci.2016.01.027

[7] Ali, A. H., Mohamed, H. M., & Benmokrane, B. (2020). Bar size effect on long-term durability of sand-coated basalt-FRP composite bars. Composites Part B: Engineering, 195, 108059.

DOI: 10.1016/j.compositesb.2020.108059

[8] Yu, T., Chen, Z., Peng, X., Yu, T., & Kim, Y. H. (2022). Nonlinear modeling on stiffness properties of diatomite-incorporated BFRPs with experimental strength and toughness evaluations. Materials Today Communications, 31, 103647.

DOI: 10.1016/j.mtcomm.2022.103647