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http://dx.doi.org/10.14190/JRCR.2020.8.2.235

Engineering Characteristics of Blast Furnace Slag Cement Mortar Using Chlorine Bypass System-Dust as Alkali Activator  

Han, Min-Cheol (Department of Architectural Engineering, Cheong-ju University)
Lee, Dong-Joo (Department of Architectural Engineering, Cheong-ju University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.8, no.2, 2020 , pp. 235-244 More about this Journal
Abstract
This study conducted a series of studies to offer a novel method of using CBS-dust that produced as by-product in the manufacture of cement. Four different contents of BS and CBS-dust were adopted for test parameters of this study. Mortar with 50% of W/B was fabricated. First, in the case of the fresh mortar, the flow decreased as the CBS-dust replacement rate increased, but the binder composition ratio BS 45% and 65% showed higher fl ow than Pl ain when repl acing CBS-dust 5%. In the case of air content, overall, the tendency was proportional to the CBS-dust replacement rate, and chloride tended to exceed the reference value at all replacement rates except for the CBS-dust 0% replacement. The compressive strength of the hardened mortar shows the resul t that the strength is improved when the CBS-dust is repl aced by 5% to 10%, and the CSH gel and structure formation is confirmed by microstructure analysis through the hydration reaction when the CBS-dust is replaced. Therefore, for a given condition CBS-dust is used as a early-strength admixture in a concrete secondary product that uses a large amount of admixture without reinforcing bars it can be an effective method for enhancing the strength of concrete as an alkali activator.
Keywords
Chlorine Bypass System dust(CBS dust); Cement mortar; Alkali activator;
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Times Cited By KSCI : 4  (Citation Analysis)
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