Abstract
Effect of property of substrate concrete on blistering of floor coatings is studied from the two view points such as property of concrete itself and surface characteristics. The concrete specimens of various water cement ratios, on which floor coatings is applied, were exposed in the accelerated condition for reproducing blistering, and growth of blisters were observed for a few months. After the test, adhesive strength was measured and the concrete surface was observed through a microscope. It was found out that blistering is much influenced by the water flux property induced by semi-permeability of concrete, and the distribution of adhesive strength caused by exposed materials on surface such as cement paste, aggregates and laitance.
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