저온환경하 콘크리트 시공을 위한 영하온도 경화가능형 시멘트 모르타르 및 단열·발열거푸집 개발에 관한 실험적 연구

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김목규;박장현;김형철;최현국;이한승
Kim, Mok-Kyu;Park, Jang-Hyun;Kim, Hyeong-Cheol;Choi, Hyun-Kook;Lee, Han-Seung

  • 투고 : 2016.03.03
  • 심사 : 2016.05.15
  • 발행 : 2016.05.30

초록

Domestic construction market is congested enough at the moment cause enterprises to enter overseas market such as Mongolia and Russia. However most previous studies conducted at a temperature above freezing. In this study, performance analysis of cement mortar was conducted without extra heating air supplying at a low temperature below freezing. For this study, all of materials for experiment were kept in a low temperature for 48 hours before mortar mixing. After mortar curing at low temperature, compressive strength was measured at the early ages. Also, properties of hardened cement material was analysed using TG-DTA and MIP. At experiment series 1, to figure out whether cement hydration reaction at low temperature below freezing is possible or not, use anti-freezing agent to protect freezing of water used in mortar mixture and analyze increasing amount of $Ca(OH)_2$, chemical bound water contained in mortar by usage of hardening accelerator and curing period at low temperature condition. At experiment series 2, insulated and heating form have been used with mortar has same mix proportion as series 1. Thermal performance and compressive strength of mortar are conducted and analyzed excremental result according to the variable form types. Especially, high fineness cement is considered to use with insulated form. Hydration heat of quicklime is used for heating form in this study. The analysis of this study confirmed that high fineness cement with insulated form and heating form can be suitable to be used in low temperature environment.

키워드

저온환경;방동제;내한촉진제;단열거푸집;발열거푸집

참고문헌

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  3. Knag, H. Y., Han, S. G., Kim, Y. S., & Nam, J. S. (2009). A New Construction Field of Kyeryong Construction & Industrial Co., Ltd. Richeville in Russia Khabarovsk - An Application of Concrete Placement in Severe Cold Weather Environment, Journal of the Korea concrete institute, 21(2) 62-66.
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  9. Won, C., Park, S. J., & Lee, S. S. (2006). A Site Application of Winter Concrete Using Freezing Protection Accelerator, Journal of Korea Concrete Institute, 18(6), 38-45.
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  11. Han, C. G., Han, M. C., Choi, S. Y., & Roh, D. H. (2009). Micro-Structure Analysis of the Fine Particle Classification Cement and Engineering Properties of the Concrete Incorporating It, Journal of the Architectural institute of Korea Structure & Construction, 24(10), 83-90.