床陶磁器質タイル張り仕上げの衝撃破壊性状

概要

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Experiments regarding impact fracture of floor finish ceramic tile applications have been conducted using a freely falling steel ball. Measurements of coefficient of rebound and time of contact concerning the impact of the steel ball on ceramic tiles in place were made in these experiments. The values investigated for basic parameters were : impact velocity, 0.44 to 9.90 m/sec ; weight and diameter of steel ball, 400 g and 47.6 mm ; type of ceramic tile, porcelain, stoneware, and earthenware ; and application method of ceramic tile, thin-bed method and thick-bed method. It was found that the impact fracture behavior of the ceramic tiles could be explained in terms of decrement of coefficient of rebound which was influenced by an impact fracture index. Perforation fracture of ceramic tiles tended to occur with the thin-bed method. In contrast, there was a tendency for yield fracture of the applied mortar to occur with the thick-bed method because of the weaker strength mortar used in this method. These fractures could be pinpointed as the inflection point of the time of contact. To improve impact resistance of flooring ceramic tile, application materials and application methods having greater values of (1) elastic moduli of ceramic tile and applied mortar, (2) ceramic tile thickness, and (3) shearing bond strength between ceramic tile and applied mortar should be chosen.
社団法人日本建築学会の論文
1987-04-30