本研究乃利用鹼激發原理，將電弧爐鍊鋼廠所生產之還原碴廢棄物製成鹼激發還原碴膠結材，期能取代傳統高耗能高碳牌之波特蘭水泥。主要藉由改變鹼活化劑中矽酸鈉及氫氧化鈉之濃度，探討不同鹼活化劑對所製成鹼激發還原碴膠結材抗壓強度之影響，結果發現提高鹼活化劑中之鹼當量及鹼模數，皆可使所製成膠結材抗壓強度大幅提升，使用水膠比越低者所製成膠結材抗壓強度也有上升趨勢，但由於時常伴隨速凝、劇烈乾縮及白華現象等不利於膠結材之強度發展之影響，同時矽酸鈉材料成本較昂貴，因此，藉由添加廢容器玻璃粉沫，取代部分還原碴粉末作為鹼激發原料。實驗結果發現，僅使用還原碴粉末作為原料，所製成的鹼激發還原碴膠結材試體，經高溫連續養護五天後抗壓強度可達24.765 MPa，但若添加10%廢容器玻璃粉末所製成鹼激發還原碴膠結材試體，於高溫養護一天後抗壓強度可提高至32.04 MPa，至於添加20%廢容器玻璃粉末者，於高溫高壓鍋爐內進行養護後最高抗壓強度為37.54 MPa。
使用以上三種製作鹼激發還原碴膠結材之最佳配比設計，分別選用機械發泡與化學發泡，嘗試製作鹼激發還原碴泡沫試體，結果發現機械發泡方式並不適合應用於製作鹼激發還原碴泡沫試體，使用化學發泡方式所製成鹼激發還原碴泡沫材料，藉由觀察泡沫試體抗壓強度與其相對密度之試驗成果對數圖，顯示本研究所製作鹼激發還原碴泡沫試體，相當接近完美封閉型泡沫材料，即使於低相對密度情況下，鹼激發還原碴泡沫試體仍具有良好抗壓強度。

The alkali-activated reducing-slag binders were produced by using the electric arc furnace slag through the alkaline activation reaction, aiming to replace traditional Portland cement with high energy cost and carbon dioxide emission. The effects of the composite alkaline activators containing sodium silicate and sodium hydroxide on the compressive strengths of the resulting alkali-activated reducing-slag binders were investigated. Experimental results indicate that the compressive strengths of the binders are enhanced significantly with increasing alkali-equivalent content and silicate modulus but decreasing water/binder ratio of the alkaline activators we used. But, their compressive strengths are reduced due to the occurrence of rapid setting, severe shrinkage and efflorescence. As lower cost of alkaline activator is sought, waste container glass was introduced to partially replace reducing-slag in the production of the binders. It is found that the compressive strength of the binders without any container glass reaches 24.77 MPa after 5 days high temperature curing. The compressive strength of the binders is increased to 32.04 MPa when 10% container glass is introduced after 1 day high temperature curing. The compressive strength of the binders under a high temperature and pressure curing process is raised up to 37.54 MPa if 20% container glass is added. The optimal mix proportion to make the alkali-activated reducing-slag foams with various densities using chemical foaming method was obtain experimentally. Based on experimental results, it is noted that the relationship between compressive strength and density for the alkali-activated reducing-slag foams is close to that for ideal closed-cell foams.

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