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http://dx.doi.org/10.14190/JRCR.2019.7.4.287

Durability Characteristics in Concrete with Ternary Blended Concrete and Low Fineness GGBFS  

Kim, Tae-Hoon (Department of Civil and Environmental Engineering, Hannam University)
Jang, Seung-Yup (Department of Transportation System Engineering, Korea National University of Transportation)
Kwon, Seung-Jun (Department of Civil and Environmental Engineering, Hannam University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.4, 2019 , pp. 287-294 More about this Journal
Abstract
GGBFS(Ground Granulated Blast Furnace Slag) has been widely used in concrete for its excellent resistance chloride and chemical attack, however cracks due to hydration heat and dry shrinkage are reported. In many International Standards, GGBFS with low fineness of 3,000 grade is classified for wide commercialization and crack control. In this paper, the mechanical and durability performance of concrete were investigated through two mix proportions; One (BS) has 50% of w/b(water to binder) ratio and 60% replacement ratio with low-fineness GGBFS, and the other (TS) has 50% of w/b and 60% replacement ratio with 4000 grade and FA (Fly Ash). The strength difference between TS and BS concrete was not great from 3 day to 91 day of age, and BS showed excellent performance for chloride diffusion and carbonation resistance. Two mixtures also indicate a high durability index (more than 90.0) for freezing-thawing since they contain sufficient air content. Through improvement of strength in low fineness GGBFS concrete at early age, mass concrete with low hydration heat and high durability can be manufactured.
Keywords
GGBFS; Low fineness; Chloride diffusion; Freezing-thawing; Carbonation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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