Integrity of the tile finish on existing buildings is usually evaluated by the investigation of the exfoliation area and bond strength test. However, exfoliation sometimes occur again within the wall evaluated healthy by investigation. Therefore, we propose a method to assess the possibility of future exfoliation by measurement of the strain of existing wall tiles. The strain can be measured by strain gauges were affixed to the surface of the tile to be stripped. The results of the indoor and outdoor environmental test have confirmed that strain in bonded tiles can be estimated by the proposed test method.
Integrity of the tile finish on existing buildings is usually evaluated by the investigation of the exfoliation area and bond strength test.However, exfoliation sometimes occur again within the wall evaluated healthy by investigation. Therefore, we propose a method to assess the possibility of future exfoliation of existing wall tiles. In order to verify the validity of this method, evaluation in accordance with proposed method was carried out for the tiles of an existing building. It was confirmed that outcomes are compatible with the occurrence of exfoliation of the actual situation.
The influence by the testing time was examined about the shrinkage compliance examination of tiled finish. As a result, the shrinkage compliance examination and the value of the destruction point with short loading time is found to show better performance than the case where the shrinkage progresses over a long period of time. Moreover, it proposed the method of evaluating the decrease of tile adhesion from the result of the shrinkage compliance examination. And, it was clarified that the decrease tendency of the bond strength of the tile finish can be estimated by using the proposed shrinkage transmission remaining rate.
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