Study on bond performance between seawater sea-sand concrete and BFRP bars under chloride corrosion

Abstract

In this paper, based on the corrosion of chloride, the interfacial bonding performance between seawater sea-sand concrete (SSWSC) and BFRP bars was tested by eccentric pull-out test. The results show that with the increase of corrosion age, increasing chloride concentration and temperature will aggravate the degradation of the bonding performance between BFRP bars and seawater sea-sand concrete. Increasing the thickness of concrete protective layer and decreasing the diameter of BFRP bars are beneficial to the improvement of bond strength. Based on Bank’s life prediction model and Arrhenius acceleration theory, the bond strength between seawater sea-sand concrete and BFRP bars under the cyclic action of chloride corrosion in 50 years is predicted, and it is predicted that the damage factor will be less than 0.6 after 50 years of service, and the damage factor will gradually increase with the increase of temperature.