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Use of By-product Hydrated Lime as Alkali Activator of Blast Furnace Slag Blended Cement  

Cho, Jin-Sang (Korea Institute of Limestone & Advanced Materials)
Yu, Young-Hwan (Korea Institute of Limestone & Advanced Materials)
Choi, Moon-Kwan (Korea Institute of Limestone & Advanced Materials)
Cho, Kye-Hong (Korea Institute of Limestone & Advanced Materials)
Kim, Hwan (Department of Materials Science and Engineering, Seoul National University)
Yeon, Kyu-Seok (Department of Regional Infrastructure Engineering, Kangwon National University)
Publication Information
Resources Recycling / v.19, no.3, 2010 , pp. 33-44 More about this Journal
Abstract
In this study, the possibility of utilizing carbide lime waste, obtained from the generation of acetylene process, as a alkali activator of blast furnace slag cement was investigated. The physical and chemical analysis of the carbide lime waste was studied and three types lime waste in order to investigate behaviour as alkali activator were used. Lime wastes were added 0, 10, 20 and 30 wt.% in blast furnace slag and blast furnace slag containing lime waste were added 0, 10, 30 and 50 wt.% in OPC. As a result of analysis of hydration properties, in the case of calcium hydroxide rehydrated after heat treatment at $800^{\circ}C$, it was higher hydration rate than other specimens. For the results of compressive strength test, when lime waste passed 325 mesh sieve and rehydrated calcium hydroxide were used, it was higher compressive strength than OPC from hydration 7days. At OPC50 wt.%-BFS45 wt.%-AA5 wt.% system using lime waste of 325 mesh under, the highest compressive strength appeared.
Keywords
Lime waste; Blast furnace slag; Compressive strength; Alkali activation; Acetylene Gas; Calcium Carbide;
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