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Title |
Evaluation of Hydration Heat Characteristics of Strontium Based Hydration Heat Reducer Addition on Concrete in Hot Weather Condition
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Authors |
서동균(Dong-Kyun Suh) ; 김규용(Gyu-Yong Kim) ; 길배수(Bae-Su Kil) ; 코야마 토모유키(Tomoyuki Koyama) ; 남정수(Jeong-Soo Nam) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.6.189 |
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Keywords |
콘크리트 물리적 특성; 서중환경; 수화열; 스트론튬계 상전이 물질 Concrete mechnical property; hot weather condition; hydration heat; strontium based phase change material |
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Abstract |
When concrete member become large like in high rise buildings, hydration heat makes temperature difference inside and outside and cause cracks. The method of using latent heat material as heat reducer could be more accessible, usable and efficient than other methods. Therefore, many studies using PCM as heat reducer are being conducted. Since heat reducer have different reacting temperature, they may be affected by environmental factors like ambient and concrete mixing temperature but studies issuing this are insignificant. Therefore, this paper attempt to evaluate the hydration heat characteristics and quality of concrete using strontium-based PCM under hot weather conditions. As a result, when the strontium-based hydration heat reducer was mixed 3wt.% and 5wt.% in hot weather condition, hydration heat speed and heating rate could be reduced by 8%, 21%, and 75, 85 minutes compared to OPC, respectively. This is considered to be the phase change reaction is relatively promoted when the temperature is high and cause improve performance than room condition result. Later, comparing the efficiency of other types of P.C.M in hot weather condition, and conduct detailed reviews on the strength development in long-term age.
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