現存許多古蹟及歷史建築之牆體甚多皆是以夯土材料構築而成。由於古法夯土磚體本身常存在有抗壓強度低弱、結構膠結能力不足,抗水性差等不佳性質,當年代久遠或承受自然災害,容易產生老化剝離、錯動開裂甚至坍塌等現象。目前夯土結構保修的相關文獻實不足以支應,使得古蹟及歷史建築的保護維修困難重重。本研究使用近年來逐漸展露頭腳的“無機聚合物”,取用同為自然材料的高嶺土,添加鋁、矽化合物使產生膠體,拌和不同夯土材料,製作成夯土磚材及砌築膠結漿體,以自行規劃之試體組進行直接剪力實驗,以包含傳統及新開發之不同砌築膠結漿體黏結包括古今傳統及新開發之四類不同夯土磚探討比較其抗剪性能,對於期待作為夯土結構古蹟及歷史建築修復之替代材料材料而言,所顯示的結果部分確實令人鼓舞。
The wall bodies of many existing ancient remains and historical buildings were constructed by compacted earth material. The old fashion earth bricks usual had the properties of low strength, poor bonding, and bad water resistance. Deterioration, disintegrating, cracking, and even collapse due to weathering or aging happened commonly. The reference concerning the maintenance of such is quite few up to now, and cause the related works very difficult. The present research made use of a newly developed bonding material, namely geopolymer, and added it into regular earth to manufacture compacted bricks. A series original experimental tests using special specimen have been execute to investigate the shear strength between the bonding surfaces of the bricks. For the view of finding a expected reliable material to repair ancient remains and historical buildings, the results are quite encouraging.
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