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• Main Authors: Ming-Fu Wu, 吳明富
• Other Authors: Wei-Hsing Huang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/95525262782617985879

碩士 === 國立中央大學 === 土木工程學系 === 101 === The current domestic steel mills are having difficulties in the deinventory process of furnace flag, which large amount of accumulation has appeared. If we could use furnace slag as bonding materials to replace part of the cement usages and develop it into green materials that can eventually replace traditional cement, the purpose of environmental protection and waste recycling will be effectively achieved. The development and research on the use of industrial byproducts as bonding materials to replace cements has matured, including blast furnace slag and fly ash which are also widely discussed. This concept is used in this study: first of all, it focuses on whether there would be any characteristics of bonding materials if reductive slag is applied to cement-like materials. Then by mixing reductive slag with blast furnace slag to produce mixed-furnace slag, the most appropriate ratio could be identified in order to increase the quality of the bonding material and thus replace the amount of cement usage in concrete cement materials. On the other hand, the enhancement of the availability of reductive slag by alkali-activation technology without the presence of Portland cement is also an important part of this study. Test results of the strength activity index of mixed-furnace slag has shown that the amount of usage when mixing reductive slag with blast furnace slag to get mixed-furnace slag to replace cement has to be limited in order to avoid adverse effects on the compressive strength. In terms of durability, the capability of resistance to sulfate attack should be taken into consideration. As for the alkali activation slurry made from mixed-furnace slag, the preferred proportion should be 4% alkali, a 1.25 ratio of alkaline modulus, and a 70/30(slag/reductive slag) ratio of mixed-furnace slag for engineering and economical purposes.