Influence of Surface Roughness on CFRP/Concrete Composites in Flexure
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Carbon Fibre Reinforced Polymer (CFRP) composites have been progressively more utilized to strengthen the concrete members to improve its flexural performance. Flexural capacity of CFRP strengthened concrete members mainly hinge on controlling probable failure modes. The inter-facial bond failure takes place owing poor surface preparation for FRP application which grounds a bond failure between concrete and adhesive eventually. Preparation of concrete substrate plays a significant role in terms of engendering strong bond between FRP - concrete interface. Achieving uniform surface roughness all...
Carbon Fibre Reinforced Polymer (CFRP) composites have been progressively more utilized to strengthen the concrete members to improve its flexural performance. Flexural capacity of CFRP strengthened concrete members mainly hinge on controlling probable failure modes. The inter-facial bond failure takes place owing poor surface preparation for FRP application which grounds a bond failure between concrete and adhesive eventually. Preparation of concrete substrate plays a significant role in terms of engendering strong bond between FRP - concrete interface. Achieving uniform surface roughness all through the concrete substrates is the major issue in surface preparation procedure since the uniformity of the roughened concrete substrates totally depends on the human skills and experience. Existing surface roughness quantification methods have a substantial discrepancy although a unique quantification method is essential more imperatively. In the present study, the experimental investigation was focused on the flexural performance of the externally strengthened CFRP concrete beams with different types of surface preparation levels.
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