本研究以三種水膠比(w/b = 0.3、0.35、0.4)、三種水淬高爐石粉由飛灰取代量(0%、30%、60%)、四種排煙脫硫(flue gas desulfurization, FGD)石膏由水泥取代量(1%、3%、5%、7%)等配比因子製作超硫酸鹽水泥漿體，探討此漿體在石灰水與濃度5%硫酸鈉溶液等兩種養護條件，及1、3、7、14、21、28及56天等7個齡期之凝結時間、迷你坍度、抗壓強度、超音波速、熱傳導係數試驗、長度變化量、重量變化量等工程及耐久性質，並以XRD及SEM微觀試驗分析驗證其巨觀行為。
研究結果顯示：(1) 新拌性質：以30%及60%飛灰取代爐石粉之超硫酸鹽水泥漿體初凝時間由757分鐘分別延長最多至1004及1174分鐘，迷你坍度由413 mm分別增加至444 mm及494 mm；(2)工程性質：水膠比為0.35，飛灰取代量為30%之各配比漿體擁有最佳55至74 MPa之56天齡期抗壓強度，分別較飛灰取代量0%及60%時高11%及14%；此配比漿體之超音波速為4011.5 m/s，分別高於飛灰取代量0%及60%時3%及9%；以30%及60%飛灰取代爐石粉之超硫酸鹽水泥漿體熱傳導係數分別由0.71 W/(m∙K)增加至0.72 W/(m∙K)及0.76 W/(m∙K)；(3)耐久性質：長度變化量之結果顯示飛灰取代0%增加至60%時漿體之長度變化由-5400 μm/m減少至-2800 μm/m ，減少48%；重量變化量由0.00275至0.00196，減少29%；(4) XRD及SEM微觀結果顯示，超硫酸鹽水泥漿體之水化產物主要以鈣礬石、石膏及C-S-H膠體為主，且當試體以硫酸鈉溶液養護時，硫酸根離子會促進鈣礬石及石膏之生成且產生膨脹。

In this experimental study explores the influences of water-to-binder ratios (w/b=0.3, 0.35, 0.4), fly ash was used as a partial replacement of GGBFS, constituting the following amounts: 0%, 30%, and 60%, and cement was used as a partial replacement of FGD gypsum, constituting the following amounts: 1%, 3%, 5%, and 7%. The samples were cured in lime water and 5% sodium sulfate solution until 56 days to know the durability of specimens. By using the setting time test, mini slump test, compressive strength test, ultrasonic pulse velocity test, thermal conductivity test, length change test, weight change test to explore engineering properties and durability, and XRD and SEM analysis to verify the macroscopic behavior.
Research results show that: (1) Fresh properties: replacing GGBFS with fly ash at 30% and 60% to supersulfated cement will extend the setting time from 757 minutes to 1004 minutes and 1174 minutes, mini slump test from 413 mm increase to 444 mm and 494 mm. (2) Engineering properties: the fly ash replacement amount is 30% with water-binder ratio is 0.35 has the best performance, compressive strength results shows at 55 MPa to 74 MPa. (3) Durability test: length changed test result shows that 60% fly ash replacement have the lowest length changed, the decreasing from-5400 μm/m to -2800 μm/m, it’s 48% lower than without fly ash replacement, and weight changed test result shows that 60% fly ash replacement also have the lowest weight changed result, it’s 29% lower than without fly ash replacement. (4) Micro properties: XRD and SEM results show that the hydration products of supersulfated cement paste are mainly ettringite, gypsum and C-S-H gel. The specimens are curing with sodium sulfate solution, sulfate ion will promote ettringite and gypsum formed and expanding.

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