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Comparison of winter temperature profiles in asphalt and concrete pavements.
  • Published Date:
    2014-06-01
  • Language:
    English
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Comparison of winter temperature profiles in asphalt and concrete pavements.
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  • Publication/ Report Number:
    UT-14.01
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  • Abstract:
    The objectives of this research were to 1) determine which pavement type, asphalt or concrete, has

    higher surface temperatures in winter and 2) compare the subsurface temperatures under asphalt and

    concrete pavements to determine the pavement type below which more freeze-thaw cycles of the

    underlying soil occur. For analysis, 12 continuous months of climatological data primarily from the 2009

    calendar year were acquired from 22 environmental sensor stations (ESSs) near asphalt roads and nine

    ESSs near concrete roads. To predict pavement surface temperature, a multiple linear regression was

    performed with input parameters of pavement type, time period, and air temperature. Similarly, a multiple

    linear regression was performed to predict the number of subsurface freeze-thaw cycles, based on month,

    latitude, elevation, and pavement type. A finite-difference model was created to model surface

    temperatures of asphalt and concrete pavements based on air temperature and incoming radiation.

    With respect to pavement surface temperatures, the results showed that, for near-freezing conditions,

    asphalt is warmer during the afternoon and concrete is warmer during other times of the day, but that

    neither pavement type is warmer, on average. The regression equation predicting the number of subsurface

    freeze-thaw cycles provided estimates that did not correlate well with measured values; data that were not

    available for this research but are likely necessary in estimating the number of freeze-thaw cycles under the

    pavement include pavement layer thicknesses, layer types, and layer moisture contents.

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