水工生態混凝土淨化水質之研究

依據行政院農業委員會漁業署92~95年漁業年報指出，台灣所產生的牡蠣數量，平均約有二萬多噸，牡蠣殼多半未經過處理任意丟棄路旁，影響環境衛生和觀光視野甚劇，有鑒於環保問題日趨嚴重，如何有效處理牡蠣殼已成爲當前重要課題之一。將牡蠣殼粉和聚丙烯棄邊絲纖維摻入混凝土中，不僅可解決廢棄物的環保問題，同時也提高廢棄物再生利用的價值。水工構造物長期處於水流的衝擊和磨蝕下，爲了確保結構體之安全，提高水中混凝土的抗沖蝕和生態性，以牡蠣殼粉和聚丙烯棄邊絲織維慘入混凝土中，拌製生態性混凝土，不僅解決廢棄物的環保問題，同時也提升廢棄物資材化再生利用的價值。進行混凝土材料的力學性質和淨化水質等試驗分析。試驗結果顯示，混凝土中添加適量的牡蠣殼粉和聚丙烯棄邊絲織維，可顯著提高混凝土的抗衝擊和磨耗等性能，以及提升，混凝土於淨化水質的效果。此研究成果可應用於水工結構物之設計，並提昇混凝土構造物之生態性。

關鍵字

牡蠣殼粉；聚丙烯棄邊絲纖維；生態混凝土；淨化水質；水工結構物

並列摘要

The annual report from 92 to 95, a source from Fisheries Agency, the Council of Agriculture to Executive Yuan, indicated that the average amount of oyster generated in Taiwan was over 20 tons annually, and yet most shells of the oyster were thrown aside on the roadside at random. It influenced the environmental sanitation and the field of vision of tourism severely, given that such an environmental issue was getting worse, so that how to handle these shells effectively became a crucial subject at present. Not only can this problem be solved by incorporating the powder of the oyster shells and polypropylene fiber into a concrete, and this method also promoted the value of the recycling of the waste materials. This study, by incorporating the oyster powder and polypropylene fiber into the concrete as an ecological structural concrete applied for the hydraulic structural concrete in the hydraulic engineering, for the surface of the concrete under the erosion of water current containing the high content of sand, in order to assure the structural concrete was functioning in normal and safe condition to reach the goal of purge on water quality and wear resistance was processing the tests of hydraulic properties and the analyses of water quality, the procedures which provided the understanding of the hydraulic structural concrete suffering the erosion from water current, which sought the optimal mixture proportioning design to the concrete, which reduced the erosion and abrasion on the surface of the hydraulic structural concrete, which enhanced the safety and functioning of the hydraulic structural concrete, and which met the end of purge on water quality. The results showed that the appropriate amount of oyster powder and polypropylene fiber added into the hydraulic structural concrete can obviously improve the erosion and abrasion and wear resistance of the hydraulic structural concrete and enhance the effectiveness of purge on water quality. Thus this concrete can be employed in the hydraulic construction