GFRP-confined coral aggregate concrete cylinders: The experimental and theoretical analysis

This study presents glass fibre-reinforced polymer (GFRP)-confined coral aggregate concrete (CAC) cylinders (GCAC cylinders) as a novel composite column in marine engineering. First, we mixed the CAC using ordinary Portland cement, fly-ash, seawater, and coral aggregate then analysed the axial strength properties of the CAC and GCAC cylinders. The CAC mixing proportion was proved appropriate and the strength and brittleness of the composite columns was improved. An axial-strength model was then established for GCAC based on the improved twin shear strength theory, which showed high theoretical significance and accurate prediction capabilities. As above, the main points and novelties can be concluded as follow: (a) the mix proportion of CAC was presented; (b) the new composite columns (GCAC) were presented and studied; (c) the strength model for GCAC was established; (d) the future research directions were pointed out. (C) 2019 Elsevier Ltd. All rights reserved.