Investigation of the bond properties between hybrid fiberreinforced concrete and BFRP bars after exposure to high temperature




High temperature, BFRP bar, Hybrid fiber-reinforced concrete, Microscopic morphology, Bond properties


This research investigated the bond properties at high temperatures and with hybrid fiber addition between basalt fiber reinforced polymer (BFRP) bars and hybrid fiber-reinforced concrete (HFRC). The tensile strength and appearance morphology of BFRP bars were analyzed. Used scanning electron microscopy (SEM) to examine the microscopic morphology and used the bond-slip constitutive model to fit the bond-slip curves. When BFRP bars after exposed to 300 °C, their tensile strength dropped by 42%. With the increasing temperature, the bond strength and stiffness of normal concrete (NC) specimens decreased by 27.3 % and 67.5 %, respectively, while HFRC specimens decreased by 20.8 % and 55 %, respectively. Hybrid fibers increased the bond strength and stiffness of HFRC specimens by 27.1 % and 49.1 %, respectively. The best fitting models were the Malvar model and the Continuous Curve model.


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How to Cite

Liu, Z., Liu, H., Xu, W., Liu, B., Zhong, Y., Geng, J., & Liu, G. (2024). Investigation of the bond properties between hybrid fiberreinforced concrete and BFRP bars after exposure to high temperature. Materiales De Construcción, 74(353), e334.



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