Feasibility of Using Phase Change Materials to Control the Heat of Hydration in Massive Concrete Structures

Choi, Wonchang; Khil, Bae-Soo; Chae, Young-Seok; Liang, Qi-Bo; Kim, Sun-Woo

doi:10.1155/2014/781393

Cited by 30 publications

(10 citation statements)

References 13 publications

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“…Specifically, the PCM is barium hydroxide 8-hydrate (Ba(OH) 2 Á8H 2 O), which is a colorless tetragonal crystal selected in a previous related study [10]. Table 5 presents the properties of the barium-based PCM.…”

Section: Experimental Planmentioning

confidence: 99%

“…In a previous study [10], the authors evaluated the applicability of seven different types of inorganic PCM under conditions that were similar to those used for concrete materials. In that study [10], a barium-based PCM was selected as the most effective PCM for mass concrete.…”

Section: Introductionmentioning

confidence: 99%

“…In that study [10], a barium-based PCM was selected as the most effective PCM for mass concrete. That is, based on the previous study's test results, barium-based PCM was found to be able to control thermal stress by managing the hydration of heat in mass concrete.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of barium-based phase change material (PCM) to control the heat of hydration on the mechanical properties of mass concrete

Kim¹,

Khil²,

Jang

et al. 2015

Thermochimica Acta

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Section: Experimental Planmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of barium-based phase change material (PCM) to control the heat of hydration on the mechanical properties of mass concrete

Kim¹,

Khil²,

Jang

et al. 2015

Thermochimica Acta

Self Cite

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“…In recent years, the merits of PCMs have been leveraged in concrete technology, aiming to mitigate deteriorations of concrete due to (internal and external) temperature swings. These thermal damages include, but are not limited to, early-age thermal 4 cracking in mass concrete, thermal curling and thermal fatigue cracking 5 6 of concrete pavement, as well as freeze-thaw cycling induced damage. However, the PCMs, especially solid-liquid PCMs, can interfere the [7][8][9] hydration of cement and strength development of concrete.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Lightweight Aggregate Containing Phase Change Material and Water for Damage Mitigation of Concrete

Liao¹,

Kumar²,

Khayat³

2019

ES Mater.Manuf.

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This paper presents an innovative concept of multifunctional lightweight aggregate, which is produced by loading phase change material (PCM) into the interior of lightweight sand (LWS) and sealing the surface pores using water. The PCM loaded in the LWS functionalizes it as a temperature management agent in concrete, and the water in surface pores enables internal curing. It has been found that the particle shape and pore structure of crushed expanded shale LWS makes it an ideal carrier for PCM, loading sufficient PCM and maintaining better (compared to natural sand) mechanical interlocking. When coupled with the internal curing effect, the LWS yields an interpenetrated interfacial transition zone with the cement paste, leading to a compressive strength comparable to natural sand mortar. The hydration products penetrated into the surface pores also helps stabilizing PCM in the LWS. However, any PCM residuum non-stabilized in LWS tends to compromise the strength. Under an optimized scenario, the LWS-PCM composite aggregate is produced by grading, PCM impregnation, rinsing, and water saturation. A mortar proportioned with this aggregate yields comparable 28-day strength to the reference mortar and a 63% lower autogenous o shrinkage (because of internal curing). Furthermore, it shows a 7 C lower semi-adiabatic temperature rise, delayed appearance of peak temperature and gentled cooling curve. These results indicate that the functional aggregate can effectively mitigate the risk of thermal cracking in early-age mass concrete. In addition, PCM remained in aged concrete has a potential to improve its adaptivity to temperature fluctuations in the service environment.

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“…Some construction measures [11,12] have adopted thermal insulation material to cover mass concrete in order to control thermal cracks in mass concrete. Some other studies [13][14][15] have investigated the use of phase change materials (PCM) to limit the rise in temperature of mass concrete. For the pre-buried cooling water pipe method, concrete should be embedded with a large number of pipelines; the process is complex and costly.…”

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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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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Feasibility of Using Phase Change Materials to Control the Heat of Hydration in Massive Concrete Structures

Cited by 30 publications

References 13 publications

Effect of barium-based phase change material (PCM) to control the heat of hydration on the mechanical properties of mass concrete

Effect of barium-based phase change material (PCM) to control the heat of hydration on the mechanical properties of mass concrete

Multifunctional Lightweight Aggregate Containing Phase Change Material and Water for Damage Mitigation of Concrete

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

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