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http://dx.doi.org/10.4191/kcers.2012.49.5.442

Early Hydration Properties of BFS by a Change of pH  

Kang, Hyun Ju (Reasearch Institute of Chemical Engineering, Kangwon National University)
Lee, Woong Geol (Reasearch Institute of Chemical Engineering, Kangwon National University)
Song, Myong Shin (Reasearch Institute of Chemical Engineering, Kangwon National University)
Kang, Seung Min (Department of Advenced Materials Engineering, Kangwon National University)
Kim, Kyeng Nam (Department of Advenced Materials Engineering, Kangwon National University)
Publication Information
Journal of the Korean Ceramic Society / v.49, no.5, 2012 , pp. 442-447 More about this Journal
Abstract
This study investigated on the early hydration and physical characteristics of BFS by pH variation. NaOH solution was used as a pH activator. In the range from pH 12 to pH 14, Experiment was compared the hydration propertied of OPC(Ordinary Portland Cement) and BFS(Blast Furnace BFS) and BFS containing 2 wt% of gypsum. It was found that CAH(Calcium Aluminate Hydrates) phases and CSH(Calcium Silicate Hydrates) phases were formed during the early hydration of BFS, and that CAH phases, CSH phases and ettringites were formed during the early hydration of BFS containing 2 wt% of gypsum. Furthermore, early hydration of BFS and BFS containing 2 wt% of gypsum were faster then OPC at pH 14, and the 1 day compressive strength of BFS increased by approximately 30% compared to OPC, and BFS containing 2 wt% of gypsum also increased by approximately 40% compared to OPC.
Keywords
BFS; Gypsum; pH; Hydration; Quick-setting;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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