Browse > Article

Characteristics of Hydration Heat Control of Mass Concrete using Pulsating Heat Pipe in the Winter Season  

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)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.19, no.2, 2007 , pp. 169-174 More about this Journal
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.
Keywords
Pulsating heat pipe; Hydration heat; Mass concrete; Thermal crack;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ministry of Construction & Transportation, 2000, Standard specifications of concrete
2 Lee, W. H., Kim, J. H., Kim, J. S. and Jang, I. S., 1999, The heat transfer characteristics of oscillating capillary tube heat pipe, 2th ed., Two-phase Flow Modeling and Experimentation, Vol. 3, pp. 1713-1718
3 Karl, S., 1992, Heat Transfer in Condensation and Boiling, Springer-Verlag, pp.7-65
4 Hewitt, G. F., Shires, G. L. and Bott, T. R., 1994, Process Heat Transfer, CRC, pp. 423-466
5 Cha, S. W., 2002, Mathematical modeling of degree of hydration and adiabatic temperature rise, Journal of the Korea Concrete Institute, Vol. 14, No. 1, pp. 118-125   DOI
6 ASHRAE, 2001, ASHRAE Handbook Fundamentals, Chap. 38, p, 3
7 Kim, J. G., 1997, A study on technology for the reduction oh hydration heat in mass concrete structure, KAIST, Tongyang Inc., pp.39-52
8 Holman, J. P., 2004, Heat Transfer, Ninth edition, McGraw Hill, p. 756
9 Yunus, A. C., 1997, Heat Transfer, International Edition, pp. 294-320
10 Jung, C. H., 2002, Control of thermal cracking by pipe-cooling system in double T-beam bridge, Journal of the Korea Concrete Institute, Vol. 14, No.1, pp.53-60
11 Park, C. Y., 1997, A study on thermal stress by heat of hydration in mass concrete, Journal of the Research Institute of Industrial Technology, Vol. 16, pp.206-212
12 Cha, S. W., 2001, Construction techniques for crack control of underground box structures, Journal of the KIIS, Vol. 16, No.4, pp. 153-159
13 Miyazaki, Y. and Akachi, H., 1996, Heat transfer characteristics of looped capillary heat pipe, Proceeding of the 5th Int. Heat Pipe Symposium, Melbourne, pp. 378-383
14 Im, Y. B., 2003, Study on heat transfer characteristics of heat exchanger using oscillating heat pipe for low temperature waste heat recovery, Graduate School, Pukyong National University, pp.47-49
15 Oh, B. H. and Yoo, S. W., 1999, Thermal analysis and practical construction method for the hydration-induced crack control of underground concrete box structures, Journal of Korea Society of Civil Engineers, Vol. 19, No. 1-4, pp.457-467
16 Faver, A. R., 1999, Reinforced Concrete Structure, 2th ed., pp. 509-513