台灣地區因自然及人為因素導致水庫淤積快速，現階段水庫浚渫後之淤泥多以棄置處理，此法不但不符合經濟效益且易造成第二次傷害，若能予以資源化再利用，可達到環境與經濟雙贏的效果。淤泥本身具有大量之矽、鋁來源，若能有效將其應用於無機聚合物，其具有強度且具有較低之熱傳導性、低體密度等之優良性能，可於建材使用，不僅能有效消耗淤泥之問題，更能對環境盡一份心力。
無機聚合物具有低能耗，且具有卓越之物理與化學性質，為一種類似沸石之結構，其與沸石最大的差異為結晶度不同，沸石具有高度的結晶性，而無機聚合物則為非晶質之結構。本實驗以添加水淬爐石粉提高無機聚合物之膠結性能，當鹼性溶液與水庫淤泥及水淬爐石粉混合後，會將粉體材料中之矽、鋁、鈣離子溶出，並互相鍵結形成Si-O-Si(Al)支架狀結構與C-S-H膠體等兩種生成物。
本研究可分為三個部分，(1) 水淬爐石粉之取代量；(2)鹼液濃度；(3)發泡劑種類。
經由XRD以及SEM微觀圖之結果顯示，採用水淬爐石粉作為本研究之部分膠結材料，其與鹼液混合經過水化反應後，可生成C-S-H膠體，當鹼液濃度越高，其C-S-H膠體之結晶相較於明顯，而當養護時間增加，其C-S-H膠體之結晶相亦會隨著養護時間增加而增加。以爐石添加30wt%，當Si/Na比採用1.25及1.5時，其抗壓強度可符合普通磚15Mpa之抗壓強度標準；調整鹼液濃度使Si/Na比為1.25時，當發泡劑採用金屬鋁粉其添加量為0.01wt%，可達普通磚之規範；而當發泡劑採用金屬鋁粉其添加量為0.02wt%時，可符合ALC輕質磚種類G10之規範；而當採用發泡劑為金屬鋁粉其添加量為0.03wt%時，可符合ALC輕質磚種類G8之規範。當發泡劑採用過硼酸鈉，其添加量為1 wt%，當L/S為0.7及0.8時，分別可符合ALC輕質磚G8及G10種類之規範標準。
關鍵詞：水庫淤泥、水淬爐石粉、無機聚合物、發泡劑

SUMMARY
Water reservoir sediment is a kind of weathering product that precipitates at the bottom of reservoirs. It reduces the capacity of reservoirs and shortens their usage life. In order to extend the usage life of reservoirs, a dredging process is employed. The excavated sediment is usually buried or disposed of downriver, damaging the ecology. To solve this problem reservoir sediment was used to manufacture geopolymers.
Geopolymers were well developed in recent years. The structure of geopolymers is similar to zeolite. The difference lies in that zeolite has higher crystallinity, while geopolymers are amorphous substances. Geopolymers are well used as construction material because of its excellent property of fire resistance and high mechanical strength.
In this study, the solid portion was adjusted by mixing slag with water reservoir sediment. Slag was added as the cementitious material into geopolymers. Slag is rich of CaO and able to be dissolved in high concentration of alkaline solution. The dissolved calcium ions further reacted to produce calcium silicon hydrate.
However, the material used in the construction may be doubted about its overweight.To lightweight the material, foaming agent was adopted in the study.
When 0.02 wt% aluminum powder was added as foaming agent into soild portion, the products were fitted the regulations of G10 ALC autoclaved lightweight aerated concrete. In addition, 0.03 wt% aluminum powder was added as foaming agent into soild portion, the products were fitted the regulations of G8 ALC autoclaved lightweight aerated concrete. On the other hand, when 1wt% Sodium perborate was added as foaming agent into soild portion, with L/S in 0.7 and 0.8, the products were fitted the regulations of G10 and G8 ALC autoclaved lightweight aerated concrete.

Key word：water reservoir sediment, slag, geopolymers, foaming agent

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