TY - JOUR
T1 - Numerical simulation of heat and mass transport during hydration of Portland cement mortar in semi-adiabatic and steam curing conditions
AU - Hernandez-Bautista, E.
AU - Bentz, D. P.
AU - Sandoval-Torres, S.
AU - De Cano-Barrita, P. F.J.
N1 - Publisher Copyright:
© 2015 Published by Elsevier Ltd.
PY - 2016/5/1
Y1 - 2016/5/1
N2 - A model that describes hydration and heat-mass transport in Portland cement mortar during steam curing was developed. The hydration reactions are described by a maturity function that uses the equivalent age concept, coupled to a heat and mass balance. The thermal conductivity and specific heat of mortar with water-to-cement mass ratio of 0.30 was measured during hydration, using the Transient Plane Source method. The parameters for the maturity equation and the activation energy were obtained by isothermal calorimetry at 23 °C and 38 °C. Steam curing and semi-adiabatic experiments were carried out to obtain the temperature evolution and moisture profiles were assessed by magnetic resonance imaging. Three specimen geometries were simulated and the results were compared with experimental data. Comparisons of temperature had maximum residuals of 2.5 °C and 5 °C for semi-adiabatic and steam curing conditions, respectively. The model correctly predicts the evaporable water distribution obtained by magnetic resonance imaging.
AB - A model that describes hydration and heat-mass transport in Portland cement mortar during steam curing was developed. The hydration reactions are described by a maturity function that uses the equivalent age concept, coupled to a heat and mass balance. The thermal conductivity and specific heat of mortar with water-to-cement mass ratio of 0.30 was measured during hydration, using the Transient Plane Source method. The parameters for the maturity equation and the activation energy were obtained by isothermal calorimetry at 23 °C and 38 °C. Steam curing and semi-adiabatic experiments were carried out to obtain the temperature evolution and moisture profiles were assessed by magnetic resonance imaging. Three specimen geometries were simulated and the results were compared with experimental data. Comparisons of temperature had maximum residuals of 2.5 °C and 5 °C for semi-adiabatic and steam curing conditions, respectively. The model correctly predicts the evaporable water distribution obtained by magnetic resonance imaging.
KW - Accelerated curing
KW - Cement-based materials
KW - Exothermic reaction
KW - Isothermal calorimetry
KW - Moisture distribution
KW - Nuclear magnetic resonance
UR - http://www.scopus.com/inward/record.url?scp=84961639088&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2015.10.014
DO - 10.1016/j.cemconcomp.2015.10.014
M3 - Artículo
C2 - 27022208
SN - 0958-9465
VL - 69
SP - 38
EP - 48
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
ER -