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http://dx.doi.org/10.14190/JRCR.2015.3.3.261

Strength Development and Durability of High-Strength High-Volume GGBFS Concrete  

Kim, Joo-Hyung (High-tech Construction Materials Center, Korea Conformity laboratories)
Jeong, Ji-Yong (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Jang, Seung-Yup (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Jung, Sang-Hwa (High-tech Construction Materials Center, Korea Conformity laboratories)
Kim, Sung-Il (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.3, no.3, 2015 , pp. 261-267 More about this Journal
Abstract
To develop high-strength high-volume ground granulated blast-furnace slag (GGBFS) concrete, this study investigated the characteristics of strength development and durability of concrete with the water-to-binder ratio of 23% and the GGBFS replacement ratio of up to 65%. The results show that the compressive strength of GGBFS blended concrete is lower than that of ordinary Portland cement (OPC) concrete up to 3-day age, but the becomes higher after 7-day age. Together with strength increase, the pore structure becomes tighter, and thus the resistance to chloride ion penetration increases. Therefore, the GGBFS blended concrete has high resistance to freezing and thawing without additional air-entraining, and high resistance to carbonation despite low amount of calcium hydroxide ($Ca(OH)_2$). On the other hand, if silica fume (SF) is blended with GGBFS, the strength becomes lower than that of the concrete blended with GGBFS only, and the resistance to chloride ion penetration deceases. Therefore, it needs further studies on the reaction of SF in high-strength high-volume GGBFS concrete.
Keywords
Ground granulated blast-furnace slag (GGBFS); High strength; High volume; Strength; Durability;
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Times Cited By KSCI : 6  (Citation Analysis)
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