Abstract
Two types of fibre cement corrugated roofing sheets, one being a hybrid containing fibrillated polypropylene networks and alkali resistant glass fibres, and the other reinforced solely by the fibrillated polypropylene networks, have been exposed to natural weather for six and ten years, respectively. Flexural test results indicate that, for these exposure periods, the strength and toughness for both types of sheets has been little affected. A 20% increase in flexural peak load was found for the hybrid polypropylene-glass fibre cement sheets.
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