Estimation of the thermal properties of hardened cement paste on the basis of guarded heat flow meter measurements

Seyoon Yoon, Donald E. Macphee, Mohammed S. Imbabi*

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In the present study, a new analysis method is proposed to measure thermal conductivity, thermal diffusivity, volumetric specific heat capacity, and specific heat capacity of cement-based materials based on the guarded heat flow meter apparatus. We tested hydrated cement paste specimens with 0.4 water-to-cement ratio and applied both steady and non-steady state data to compute thermal properties of the hydrated cement paste. Thermal conductivity and thermal contact resistance were determined as 1.28 W m(-1) K-1 and 0.038 m(-2) KW-1 using steady state data. Furthermore, using a computerized system of heat flow meters and non-linear regression, we used non-steady state data to measure thermal diffusivity, volumetric specific heat capacity and specific heat capacity of the hydrated cement paste as 4.77 x 10(-7) m(2) s(-1), 2685.4 kJ m(-3) K-1, and 1.28 kJ kg(-1) K-1. The relative uncertainties of these properties fell within 2-7% range and the residual distributions were validated to follow a normal distribution based on quantile-quantile tests. (C) 2014 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalThermochimica Acta
Volume588
Early online date23 Apr 2014
DOIs
Publication statusPublished - 20 Jul 2014

Keywords

  • cement
  • concrete
  • thermal conductivity
  • thermal diffusivity
  • specific heat capacity
  • heat flow meter
  • plane source technique
  • conductivity
  • surface

Cite this

Estimation of the thermal properties of hardened cement paste on the basis of guarded heat flow meter measurements. / Yoon, Seyoon; Macphee, Donald E.; Imbabi, Mohammed S.

In: Thermochimica Acta, Vol. 588, 20.07.2014, p. 1-10.

Research output: Contribution to journalArticle

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abstract = "In the present study, a new analysis method is proposed to measure thermal conductivity, thermal diffusivity, volumetric specific heat capacity, and specific heat capacity of cement-based materials based on the guarded heat flow meter apparatus. We tested hydrated cement paste specimens with 0.4 water-to-cement ratio and applied both steady and non-steady state data to compute thermal properties of the hydrated cement paste. Thermal conductivity and thermal contact resistance were determined as 1.28 W m(-1) K-1 and 0.038 m(-2) KW-1 using steady state data. Furthermore, using a computerized system of heat flow meters and non-linear regression, we used non-steady state data to measure thermal diffusivity, volumetric specific heat capacity and specific heat capacity of the hydrated cement paste as 4.77 x 10(-7) m(2) s(-1), 2685.4 kJ m(-3) K-1, and 1.28 kJ kg(-1) K-1. The relative uncertainties of these properties fell within 2-7{\%} range and the residual distributions were validated to follow a normal distribution based on quantile-quantile tests. (C) 2014 Elsevier B.V. All rights reserved.",
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AB - In the present study, a new analysis method is proposed to measure thermal conductivity, thermal diffusivity, volumetric specific heat capacity, and specific heat capacity of cement-based materials based on the guarded heat flow meter apparatus. We tested hydrated cement paste specimens with 0.4 water-to-cement ratio and applied both steady and non-steady state data to compute thermal properties of the hydrated cement paste. Thermal conductivity and thermal contact resistance were determined as 1.28 W m(-1) K-1 and 0.038 m(-2) KW-1 using steady state data. Furthermore, using a computerized system of heat flow meters and non-linear regression, we used non-steady state data to measure thermal diffusivity, volumetric specific heat capacity and specific heat capacity of the hydrated cement paste as 4.77 x 10(-7) m(2) s(-1), 2685.4 kJ m(-3) K-1, and 1.28 kJ kg(-1) K-1. The relative uncertainties of these properties fell within 2-7% range and the residual distributions were validated to follow a normal distribution based on quantile-quantile tests. (C) 2014 Elsevier B.V. All rights reserved.

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KW - concrete

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KW - specific heat capacity

KW - heat flow meter

KW - plane source technique

KW - conductivity

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