| Title |
Characteristics of Hydration Heat Control of Mass Concrete using Pulsating Heat Pipe in the Winter Season |
| Authors |
양태진(Tae-Jin Yang) ; 김정훈(Jeung-Hoon Kim) ; 염치선(Chi-Sun Youm) ; 김명식(Myung-Sik Kim) ; 김종수(Jong-Soo Kim) |
| Keywords |
진동형 히트 파이프 ; 수화열 ; 매스 콘크리트 ; 온도 균열 Pulsating heat pipe ; Hydration heat ; Mass concrete ; Thermal crack |
| 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(1.2m1.8m2.4m) 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 2.8mm respectively. The working fluid was R-22 and charging ratio was 40% by volume. The temperature of the concrete core was approximately 55℃ 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℃. The index figure of crack was varied from 0.75 to 1.38. |