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A Computer Model to Predict the Surface Temperature and Time-of-Wetness of Concrete Pavements and Bridge Decks

Published

Author(s)

Dale P. Bentz

Abstract

This report provides documentation and example results for a computer model developed to predict the surface temperature and time-of-wetness (and time-of-freezing) of concrete pavements and bridge decks. The model is based on a one-dimensional finite difference scheme and includes heat transfer by conduction, convection, and radiation. Environmental conditions are varied by using the typical meteorological year datafiles available from the National Renewable Energy Laboratory. Based on the weather data available in these files and the developed heat transfer model, both the surface temperature and the time-of-wetness of the concrete are computed for typical pavement and bridge deck structures. These predictions will be utilized as input into sorptivity-based service life models for sulfate attack and freeze-thaw deterioration, the main goal of the NIST research project being funded by the Federal Highway Administration.
Citation
NIST Interagency/Internal Report (NISTIR) - 6551
Report Number
6551

Keywords

bridge decks, building technology, computer modeling, concrete, heat transfer, pavements, surface temperature, time-of-wetness
Created August 1, 2000, Updated February 19, 2017