Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Characteristics of Hydration Heat Control of Mass Concrete using Pulsating Heat Pipe in the Winter Season

진동형 히트 파이프를 이용한 매스 콘크리트의 겨울철 수화열 제어 특성

  • Yang, Tae-Jin (Graduate School, Pukyong National University) ;
  • Kim, Jeung-Hoon (School Of Mechanical Engineering, Sungkyunkwan University) ;
  • Youm, Chi-Sun (Bosung Construction Co., Ltd.) ;
  • Kim, Myung-Sik (Division of Construction Engineering, Pukyong National University) ;
  • Kim, Jong-Soo (Division of Mechanical Engineering, Pukyong National University)
  • Published : 2007.02.10
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Abstract

In process of reinforced concrete (RC) box structure, the heat of hydration may cause serious thermal cracking. This paper reports results of hydration heat control in mass concrete using the oscillating heat pipe. There were three RC box molds ($1.2m{\times}1.8m{\times}2.4m$) which were different from each other. One was not equipped with pulsating heat pipe. The others were equipped with pulsating heat pipe. All of them were cooled with natural air convection. The pulsating heat pipe was composed of 10 turns of serpentine type copper pipe whose outer and inner diameters were 4 and 2.8 mm respectively. The working fluid was R-22 and charging ratio was 40% by volume. The temperature of the concrete core was approximately $55^{\circ}C$ in the winter without pulsating heat pipe. For a concrete with pulsating heat pipe, however, the temperature difference with the outdoor one reduced up to $12^{\circ}C$. The index figure of crack was varied from 0.75 to 1.38.

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References

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