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http://dx.doi.org/10.11112/jksmi.2012.16.6.163

Fundamental Properties of Magnesia-Prosphate Composite Considering Mix Conditions and Curing Temperature  

Cho, Hyun Woo (한국건설기술연구원 SOC성능연구소 인프라구조연구실)
Kang, Su Tae (대구대학교 토목공학과)
Shin, Hyun Seop (한국건설기술연구원 SOC성능연구소 인프라구조연구실)
Lee, Jang Hwa (한국건설기술연구원 SOC성능연구소 인프라구조연구실)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.16, no.6, 2012 , pp. 163-170 More about this Journal
Abstract
With the advantage of a rapid exothermic reaction property, jet set concrete may be used as a cold weather concrete because it can reach the required strength before being damaged by cold weathers. And it can be hardened more quickly if the field temperature is properly compensated by heating. Because ordinary concrete cannot be hardened well under sub-zero temperatures, anti-freeze agents are typically added to prevent the frost damage and to ensure the proper hardening of concrete. While the addition of a large amount of anti-freeze agent is effective to prevent concrete from freezing and accelerates cement hydration resulting in shortening the setting time and enhancing the initial strength, it induces problems in long-term strength growth. Also, it is not economically feasible because most anti-freeze agents are mainly composed of chlorides. Recent studies reported that magnesia-phosphate composites can be hardened very quickly and hydrated even in low temperatures, which can be used as an alternative of cold weather concrete for cold weathers and very cold places. As a preliminary study, to obtain the material properties, mortar specimens with different mixture proportions of magnesia-phosphate composites were manufactured and series of experiments were conducted varying the curing temperature. From the experimental results, an appropriate mixture design for cold weathers and very cold places is suggested.
Keywords
Magnesia; Prosphate; Cold weather concrete; Jet set cement;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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