本研究將還原碴與水淬爐石粉依照一定比例混合製成混合爐碴，再以鹼活化技術活化製成膠結材。針對此膠結材之新拌性質與微觀組成進行實驗分析，並就鹼活化混合爐碴膠結材流變行為、凝結狀態判定與微觀組成架構對於性質上影響進行探討。 研究顯示鹼活化混合爐碴膠結材新拌性質具有易受外力擾動而影響工作性與凝結狀態的特性，且於拌和後1小時即產生明顯的黏滯性，因於拌和完成後即行澆置並減少外力干擾。根據新拌性質分析，鹼活化混合爐碴膠結材以水膠比0.5拌和時，漿體初凝時間約為160分鐘，終凝時間約為540分鐘。另凝結時間判定方式應分為漿體與砂漿兩種系統進行檢測，特別是漿體凝結狀態應以流度值低於80%為參考基準點。抗壓強度方面，鹼活化混合爐碴漿體3天強度可達350 kgf/cm2，7天強度可達430 kgf/cm2，但28天強度發展減緩，僅有450 kgf/cm2。微觀組成方面，鹼活化混合爐碴膠結材會因配比不同而有些許的差異，但其主體仍以C-A-S-H膠體為發展基礎。因鹼活化混合爐碴膠結材將整體環境中的Al與Si、Ca組成長鏈狀的生成產物，與水泥將Al推至水化產物外部形成較具晶相的構造相比，鹼活化混合爐碴膠結材對於針對Al進行的化學侵蝕，具有較佳的抵抗力。 ;This study aims at the fresh property and microscopic composition of alkali-activated mixed slag. We mix ladle slag and blast furnace slag according to a certain proportion, and activate mixed slag by alkali-activated technology. The fresh property and microstructure of the cementing material are analyzed experimentally, and we discuss the rheological behavior, setting time, setting condition and microscopic composition of alkali-activated mixed slag cementing material. This study shows that the fresh property of alkali-activated mixed slag cements is sensitive to workability and setting condition due to external disturbances, and has obvious viscosity at one hour after mixing. According to the analysis of the fresh property, when the paste is mixed by w/b ratio 0.5, the initial setting time is nearly 160 minutes and the final setting time is nearly 540 minutes. To determine the setting time should be divided into paste and mortar two systems for testing, especially the setting condition of paste should be flowability of less than 80% as a reference point. The compressive strength of alkali-activated mixed slag paste achieves 350 kgf / cm2 at 3 days, and it achieves 430 kgf / cm2 at 7 days. but the compressive strength at 28 days develop slowly, only 450 kgf / cm2. In terms of microscopic composition, the alkali-activated mixed slag cement will has a slight difference due to the different proportion, but the main microstructure is still based on the C-A-S-H gel. Alkali-activated mixed slag cement incorporates the Al ion with Si ion and Ca ion to form a long chain-like product. In contrast to ordinary Portland cement that expel Al out of the hydration products to form a more crystalline phase, alkali-activated mixed slag cement has better resistance to chemical attack, especially for the chemical attack of Al.
