Experimental Study on Hydration Heat Control of Mass Concrete by Vertical Pipe Cooling Method

Seo, Tae-Seok; Kim, Sam-Soo; Lim, Chang Keun

doi:10.3130/jaabe.14.657

Cited by 27 publications

(10 citation statements)

References 8 publications

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“…The function was assigned to the corresponding units as shown in Figure 12. The maximum adiabatic temperature rise K of mass concrete was calculated by Equation (10) and was obtained as 47.9˝C. It should be emphasized that the heat generated by the concrete can be calculated by Equations (10) and (13), and the calculation results are in agreement with the adiabatic calorimetry test results [21].…”

Section: Convective Heat Transfer Coefficient Function For the Side Ssupporting

confidence: 71%

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Experimental and Numerical Studies of Controlling Thermal Cracks in Mass Concrete Foundation by Circulating Water

et al. 2016

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This paper summarizes an engineering experience of solving the problem of thermal cracking in mass concrete by using a large project, Zhongguancun No.1 (Beijing, China), as an example. A new method is presented for controlling temperature cracks in the mass concrete of a foundation. The method involves controlled cycles of water circulating between the surface of mass concrete foundation and the atmospheric environment. The temperature gradient between the surface and the core of the mass concrete is controlled at a relatively stable state. Water collected from the well-points used for dewatering and from rainfall is used as the source for circulating water. Mass concrete of a foundation slab is experimentally investigated through field temperature monitoring. Numerical analyses are performed by developing a finite element model of the foundation with and without water circulation. The calculation parameters are proposed based on the experiment, and finite element analysis software MIDAS/CIVIL is used to calculate the 3D temperature field of the mass concrete during the entire process of heat of hydration. The numerical results are in good agreement with the measured results. The proposed method provides an alternative practical basis for preventing thermal cracks in mass concrete.

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Section: Convective Heat Transfer Coefficient Function For the Side Ssupporting

confidence: 71%

“…Seo et al [10] developed a vertical pipe cooling method and tested it in a wall-type mass concrete specimen to validate the method. The experimental result showed that the temperature of the concrete specimen with the vertical pipe cooling system was 8-14˝C lower than that of the control specimen without the vertical pipe cooling system.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies of Controlling Thermal Cracks in Mass Concrete Foundation by Circulating Water

et al. 2016

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“…Using cooling pipe is an important measure to control the temperature of mass concrete and prevent cracking. Engineering experience [1][2][3][4][5][6][7][8][9][10] has shown that the embedded cooling pipe in the concrete can effectively reduce the temperature peak inside the structure. However, the simulation of the temperature field of massive concrete with embedded cooling pipes is computationally intensive and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

A partitioned iterative method based on externally embedded cooling water pipe elements for mass concrete temperature field

Chao

et al. 2022

Num Anal Meth Geomechanics

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Pipe cooling is an important measure for controlling the temperature of mass concrete during the hydration period. In this paper, a new algorithm (partitioned iterative algorithm, PIA) is proposed to address the complicated process of dissecting cooling pipes in mass concrete and the difficulty of balancing the accuracy and efficiency of the simulation. The algorithm is based on the idea of finite element partitioning, where the water pipe element and the concrete element are considered as two computational parts. The coupling is used to consider the heat transfer between the water pipe and the concrete, avoiding the need to solve for the concrete temperature gradient in the vicinity of the pipe, which improves the efficiency of the algorithm. The comparison of the PIA and the discrete iterative algorithm (DIA) results demonstrates the agreement between the two algorithms in terms of computational accuracy and distribution pattern.In addition, the automatic creation and insertion of the pipe elements results in a significant improvement of the overall performance. Finally, the engineering example demonstrates that the results of the PIA at each observation point agree well with the measured values over the entire calculation time. The accuracy of the calculated peak temperature and the peak temperature age can both meet the engineering requirements.

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“…The data have used for design and placement or structural function. A kind of concrete characteristic is concrete strength and heat hydration [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Concrete strength is an indicator of concrete quality, and heat hydration is an indicator of period time hydration reaction and setting time.…”

Section: Introductionmentioning

confidence: 99%

“…And the temperature will increase due to the reaction speed of hydration and exothermic process. The heat will increase without external temperature influence [8,[10][11][12]17,18,22].…”

Section: Introductionmentioning

confidence: 99%

Heat Hydration of Recycled Concrete: Experimental Study

Suharwanto¹

2020

Proceedings of the International Conference on Agriculture, Social Sciences, Education, Technology and Health (ICASSETH 2019)

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The experimental study has been done to get data of heat hydration. It important to know the temperature in the concrete during hydration reaction and forming a gel condition of silica reaction with water. Eighteen concrete specimens of cubes have been tested for many dimensions, those are cube 25cm, 50cm, 75cm for length all of side. They made from a fine and coarse aggregate of natural and recycled aggregate from burning building waste and ready-mix residual as a base concrete material. Base on the experimental study, the peak of heat hydration occurs at 10 to 21 hours. Then it will decrease that caused by hydration reaction will be complete and form to gel condition. The heat hydration in the concrete is not affected by site or room temperature, because it is caused by the hydration reaction process between silica and water until gel condition. The peak of heat hydration will increase along with higher concrete strength because it requires more cement that is reactor with water. It can affect to surface cracking for the mass concrete because it causes increasing adiabatic to fresh concrete in the early age. And it also affects a volumetric expansion in the core, so the surface of concrete gets excessive tensile stress beyond of capacity.

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Experimental Study on Hydration Heat Control of Mass Concrete by Vertical Pipe Cooling Method

Cited by 27 publications

References 8 publications

Experimental and Numerical Studies of Controlling Thermal Cracks in Mass Concrete Foundation by Circulating Water

Experimental and Numerical Studies of Controlling Thermal Cracks in Mass Concrete Foundation by Circulating Water

A partitioned iterative method based on externally embedded cooling water pipe elements for mass concrete temperature field

Heat Hydration of Recycled Concrete: Experimental Study

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