Finite-Element Modeling and Calibration of Temperature Prediction of Hydrating Portland Cement Concrete Pavements
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 3
Abstract
The temperature profiles in a hydrating concrete slab are produced by a two-dimensional finite-element method software tool, (temperature and moisture analysis for curing concrete), as a function of time and ambient boundary conditions described in this paper. To include the effect of the heat of vaporization, heat flux due to evaporation is included in the boundary condition of heat transfer at the slab surface in addition to the effects of surface humidity, effective curing thickness, and surface moisture emissivity on the rate of evaporation. Thermal conductivity is back-calculated using the data collected from laboratory measurements toward the improvement of the modeling of thermal conductivity. Theoretically, the material properties determined in this manner should facilitate accurate temperature prediction. Thus, temperature prediction in hardening concrete pavements under various conditions can be effectively calibrated by improved material characterization. To this end, this paper provides the basis of a calibration protocol.
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Acknowledgments
The research in this paper was sponsored by the Federal Highway Administration (FHwA) and the Texas Department of Transportation (TxDOT). The writers express gratitude to the FHwA and TxDOT for their financial support.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 3 • June 2006
Pages: 317 - 324
Copyright
© 2006 ASCE.
History
Received: Feb 19, 2004
Accepted: Feb 8, 2005
Published online: Jun 1, 2006
Published in print: Jun 2006
Notes
Note. Associate Editor: Christopher K. Y. Leung
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