Abstract
Loaded transverse GRP specimens and epoxy references were exposed to different environmental conditions. Tensile strength measurements conducted under exposure and after a drying period yielded the following main conclusions: Current and residual transverse strength was not affected much by cold-water and hot dry air during a short exposure period. Under hot-water exposure, transverse strength showed a significant drop with time, especially beyond 2 days of exposure and above 25% of the preload level. Based on earlier studies, the transverse-strength degradation of GRP specimens is attributable to attack by water molecules on the fiber-glass surfaces and the fiber-matrix interfacial bonds. This process is triggered and accelerated by heat and external loading. 1 Based on strength of reference specimens of Series B-0.
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