Relationship between tile exfoliation and moisture content

作     者：Sadayuki Onmura Shuichi Hokoi Daisuke Ogura 

作者机构：Department of Science and Engineering Setsunan University Osaka 572-8505 Japan Depertment of Architecture ond Archi-tecturel EngineeringKyoto University Kyoto 606-8501 Jopun 

出 版 物：《Frontiers of Architectural Research》 (建筑学研究前沿（英文版）)

年 卷 期：2013年第2卷第3期

页      面：301-309页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 09[农学] 0303[法学-社会学] 1305[艺术学-设计学（可授艺术学、工学学位）] 0601[历史学-考古学] 0202[经济学-应用经济学] 090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0814[工学-土木工程] 0833[工学-城乡规划学] 

主　　题：External concretewall Tile exfoliation Drying Moisture content Heat and moisturetransport 

摘      要：In Japan, tile exfoliation from external walls is a serious problem that must be prevented. In our previous study, a tiled concrete sample was dried at a temperature of 105 ℃ for pre- conditioning. Then, tile exfoLiation occurred. Since this seemed to indicate a relationship between tile exfotiation and moisture content, it was further pursued in this study. First, drying experiments on concrete samples just after tiling were carried out under different ambient air temperatures. The following results were obtained. Tile exfoliation occurs even at the Lower drying temperatures. Tile exfoliation starts at corner tiles （seen in all experiments）. When the average moisture content of the tiled concrete sample becomes Lower than a certain value, tile exfoliation occurs. Next, the experiments were analyzed using a three-dimensional model of simultaneous heat and moisture transport. The calculated moisture content agreed well with the measured results. By comparing the measurement and simulation results, it is considered that the tiles are exfoliated when the moisture content of the mortar on the back side of the tile becomes Lower than a certain value. Therefore, the moisture content can serve as an index for evaluating the occurrence of the tile exfoliation.