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http://dx.doi.org/10.14190/JRCR.2021.9.2.177

Mechanical Properties of Early Strength Mortar with Ground Granulated Blast Furnace Slag and Expansive Additive  

Koo, Kyung-Mo (Building Engineering Team, Building Construction Division, Hanhwa Engineering & Construction)
Choi, Jae-Won (R&D Center, Asiacement Co.)
You, Byeong-Know (R&D Center, Asiacement Co.)
Cha, Wan-Ho (R&D Center, Asiacement Co.)
Kang, Bong-Hee (Asiacement Co.)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.9, no.2, 2021 , pp. 177-184 More about this Journal
Abstract
In this study, the effects of ground granulated blast furnace slag(GGBFS) and expansive additive(EA) on early strength mortar were examined for the purpose of reducing carbon and improving cement performance. As a result, ealry strength Portland cement(EPC) tended to decrease in flow compared to ordinary Portland cement(OPC), but binder with EPC and GGBFS was possible to obtain higher liquidity than OPC. EPC showed higher compressive strength and shrinkage than OPC. The compressive strength of specimen with EPC and GGBFS was reduced proportionally to the replacement ratio of GGBFS. The replacement ratio of GGBFS above the compressive strength equivalent to OPC was higher under low temperature conditions. The use of GGBFS resulted in high shrinkage compared to OPC, and this characteristic was even greater under low temperature conditions. The shrinkage of specimen with EA was decreased in early ages, but was higher than the OPC in long-term ages.
Keywords
Early strength mortar; Ground granulated blast furnace slag; Expansive agent; Mechanical properties;
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Times Cited By KSCI : 2  (Citation Analysis)
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