中華民國內政部建築研究所中華民國內政部建築研究所

一、研究動機與目的
外牆是承受外部環境衝擊最嚴重的地方，外牆瓷磚一旦發生剝落，往往會造成人命的傷亡。為防止瓷磚剝落，造成公共危險，本研究乃運用實驗研究方法，針對瓷磚試體，進行抗拉接著強度試驗，期望透過本次研究，能對國內外牆瓷磚相關規定，提出具體改善建議。
二、研究方法
（一）外牆瓷磚之吸水率試驗：
針對市售外牆瓷磚隨機取樣，並依據CNS3299-3陶瓷面磚試驗法進行吸水率試驗，以利取得適當吸水率的瓷磚作為本研究試樣。
（二）依據CNS12611所規範之試驗方法，針對鐵製模擬試體及市售瓷磚
進行抗拉接著強度試驗，以瞭解其接著強度及破壞行為。
三、重要發現
從鐵製模擬瓷磚試體抗拉接著強度實驗結果顯示: 提昇外牆瓷磚抗拉接著強度，增加背溝深度效益最大，其次為背溝數量，再其次為鋪貼工法，最後為背溝形狀。從市售瓷磚試體抗拉接著強度實驗結果顯示:以「吸水率」
對接著強度影響最大，其次為「背溝深度」，再其次為「鋪貼工法」。
四、主要建議事項
立即可行建議
建議一：定期辦理建築物外牆瓷剝落現況的調查統計。
主辦機關：營建署
建議營建署定期辦理國內直轄市建築物外牆瓷磚剝落現況的調查統計，以利作為研擬外牆瓷磚剝落改善對策之參考。
建議二：增（修）訂國內公共工程施工綱要。
主辦機關：行政院公共工程委員會
建議公共工程委員會增(修)訂國內公共工程綱要施工規範第09310章，將外牆瓷磚之「背溝深度」，納入規範。

I.Research Motivation and Purpose
The exterior wall is a place where suffers the most serious impact from the exterior environment. As soon as exterior wall tiles are peeled, they will lead to the injury and/or death. In order to prevent tile peeling from causing public danger, the experimental method will be employed in this research. The tensile adhesion strength tests will be conducted on the tile samples. It is expected the concrete improvements and suggestions can be proposed for exterior wall tiles in Taiwan by this research.
II.Research Method
(1)Water absorption test of exterior wall tile
Exterior wall tiles commercially available were randomly sampled, and water absorption tests were conducted according to CNS3299-3 “Ceramic Floor Tile Test Method”, so that can obtain the tiles with appropriate water absorption as samples in this research.
(2)The tensile adhesion strength tests will be conducted on the iron simulation samples and tiles commercially available according to the testing method specified in CNS12611, so that can understand the adhesion strength and destruction behavior.
III.Important Research Result
The experimental results from the iron simulation samples showed: the enhancement of tensile adhesion strength increases the maximum benefit of “the depth of back groove”, followed by “the quantity of back groove”, “paving pasting” and “the shape of back groove”. The experimental results from tiles commercially available showed: the “water absorption” made maximum influence on adhesion strength, followed by “the depth of back groove” and “paving pasting”.
IV.Main Suggestions
Immediate recommendations
Suggestion 1: Periodically and statistically investigate the current condition of exterior wall peeling for buildings.
Executive institution: Construction and Planning Agency, Ministry of the Interior
It is recommended the Construction and Planning Agency should periodically and statistically investigate the current condition of exterior wall peeling for buildings in Taiwan’s municipality, so that can be used to plan for the measures on improving exterior wall peeling.
Suggestion 2: Add (revise) the Public Work Guideline.
Executive institution: Public Construction Commission, Executive Yuan
It is recommended the Public Construction Commission should add or revise Chapter 09310 of Construction Specifications of Public Work Guideline, and incorporate with the depth of back groove.