台灣外牆石材插銷式工法孔洞填充材之安全性探討

石材為台灣建築物外牆常用飾面材料之一，但因其構造形式及材料本身自重關係，其危險性遠高於其他外牆材料，且目前在台灣並無明確之施工規範，再加上現場施工者觀念不足及施工不確實，使石材可能會因各式原因造成掉落傷人之意外。外牆石材插銷式工法為台灣目前較廣泛使用之工法，在探討文獻過程及專家訪談中，本研究發現國外有法規規定使用環氧樹脂及塑料套等彈性材料作為插銷孔與插銷鐵件之填充材，而台灣並未有相關規定。台灣現場大多使用乾式AB膠作為石材插銷孔之填充材，對於台灣常見的石材開孔填充材，其填入與否對石材版片之錨定強度及安全性之影響，尚無相關文獻探討。為探究上述問題，本研究設計了兩種實驗因子進行探討，分別為填充材（AB膠）添加與否以及不同鑽孔深度，並依照ASTMC 1354石材錨定強度標準試驗規範進行實驗。實驗結果顯示，在特定插銷長度下能有效提升石材之錨定強度，而使用AB膠做為填充材對於石材錨定強度有明顯之提升，但也會使其沒有待修維護時間，且考慮到外牆承重整體結構問題，本實驗以安全為第一優先考量，故建議尋找其他填充材來代替AB膠之使用，如使用彈性材料作為插銷孔與插銷鐵件之填充材。

關鍵字

外牆石材；插銷式工法；錨定強度；石材填充材；插銷長度

並列摘要

Stone is one of the commonly used finishing materials for exterior walls in Taiwan, but because the structural form and the weight of the materials, its danger is much higher than other exterior wall materials, and there is currently no clear construction specification. The lack of concept of the on-site constructors and the unreliable construction make the stone may fall and hurt people due to various reasons. In the process of literature research and expert interviews, there are regulations in foreign countries that epoxy resin and plastic cap should be used as fillers for dowel pins and iron parts. but there are no relevant regulations in Taiwan. Most of the sites use AB glue as the filling material for the stone pin holes. there is no relevant literature to discuss the effect of filling or not on the anchoring strength and safety of the stone. Therefore, two experimental factors for discussion in this study, whether filler (AB glue) and different drilling depths. The results show that the anchoring strength of the stone can be effectively improved under a certain length of the dowel pin. The use of AB glue as a filler can significantly improve the anchoring strength of the stone, But it will also make the stone have no time to be repaired , and considering structural problems, it is suggested to find other fillers instead of AB glue, such as using elastic materials.

並列關鍵字

dimension stone for exterior wall ； dowel anchorage system ； anchorage strength ； stone dowel hole filler ； dowel pin length

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