Abstract
In this paper, the bending test of ten seawater sea-sand concrete (SWSSC) beams were carried out. The reinforcement bars employed were steel bars, basalt fiber-reinforced polymer (BFRP), and glass FRP (GFRP) bars. The beam performance in the service stage, such as crack development, was mainly analyzed. Based on the current codes and gathered data, the equation for predicting the maximum crack width of FRP-RC beams under short-term loading was proposed. The results showed that the crack width and deflection of the FRP-beams were larger compared with those of steel-beams. An increase in reinforcement ratio or section depth notably improved the beam stiffness, thereby reducing the deflection and crack width. The application of small diameter reinforcements was beneficial to decrease the crack width without compromising the beam deflection. Based on the test results, the average bond coefficient was 1.13, which was in good agreement with the value of 1.0 provided by CSAS806-12 for ribbed reinforcements. The proposed formula of crack width calculation can be applied as a guideline for the estimation of crack development during the service of SWSSC beams.
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