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Concrete Surface Temperature vs. Time of Year

Three examples of predicted concrete surface temperatures as a function of geographical location and season of the year are provided in Figures 2, 3, and 4. Little data is available in the literature to validate these predictions, but the data of both Andrade [13] and Basheer and Nolan [14] support the general trends shown in the three figures. Specifically, during the day, the concrete surface temperature generally rises above the ambient temperature due to the incoming solar radiation. At night, the concrete temperature falls due to radiation from the concrete surface to the sky, sometimes falling below the ambient air temperature and occasionally falling below the dewpoint. This effect is more significant for bridge decks than for pavements since there is no soil sublayer providing a thermal mass beneath the concrete in the case of bridge decks.


  
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Figure 2:Temperature predictions for a concrete pavement surface in Seattle, Washington.

  
\begin{figure} \special{psfile=tucsonp.ps hoffset=0 voffset=-700 vscale=100 hscale=100 angle=0} \vspace{21.0cm}\vspace{0.10in}\end{figure}

Figure 3: Temperature predictions for a concrete pavement surface in Tucson, Arizona.



  
\begin{figure} \special{psfile=alpenab.ps hoffset=0 voffset=-700 vscale=100 hscale=100 angle=0} \vspace{21.0cm}\vspace{0.10in}\end{figure}

Figure 4: Temperature predictions for a concrete bridge deck surface in Alpena, Michigan.

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