Abstract
In this study, the tensile properties of epoxy adhesive with the inclusion of micro-scale perlite and sewage sludge ash (SSA) particles were investigated for glass-epoxy laminates adhesively bonded single-strap repairs. Particle fillers were incorporated in the epoxy resin as an additive material at different ratios by weight, namely, 5, 10, 15 wt% for perlite; 5, 10, 15 and 20 wt% for SSA as well as unfilled composites. Composite samples were weakened by opening a circular cutout at the center of them, and then repaired by the circular patches produced from the same material. The repairing performances of samples were explored for two different patch ratios (D/d = 2 and 3). Results indicated that the inclusion of perlite and SSA particles in the epoxy adhesive contributed to a significant increase in load carrying capacity at a weight content of 10 wt%.
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