Figures & data
Table 1 Maximum temperature of the asphalt pavement surface.
Figure 1 Maximum temperature of a 2-day period in August at different depths of an asphalt pavement in Houston, TX.
Figure 2 Effect of the temperature on the dynamic modulus of the asphalt mix at 10 Hz.
Figure 3 Concept of harvesting energy from pavements and reducing pavement temperature.
Figure 4 Theoretical considerations.
Figure 5 FEM model of the test set-up and results from simulations.
Figure 6 Test set-up (note: thermocouples from Cole-Parmer, Type K (chromel–alumel) thermocouple, − 250 to +482°C temperature range. Response time is 15 s and sensitivity is approximately 41 μV/°C. Data acquisition system: National Instruments SC-2345 Series. Software: LabView 8.1.)
Figure 7 Tests with large slabs.
Figure 8 Effect of paint on the temperature of water.
Figure 9 Effect of the aggregate type on the temperature of water.
Figure 10 Plots for pipe length required for the wall temperature of 40 and 60°C pavement temperature.
Figure 11 Cool spot due to close spacing of pipes.
Figure 12 Plots of pipe spacing versus water temperature.
Figure 13 Layout of thermocouples.
Figure 14 Plots of time versus surface temperature.
Table 2 Average reduction in surface temperature due to flowing water.
Figure 15 FE model and conditions.
Figure 16 Plot of surface temperature versus time.
Figure 17 Plot of radiative flux versus time.
Figure 18 Plot of air temperature versus time.
Figure 19 Plot of pavement temperature, 12.7 mm below the surface, versus time.
Figure 20 Plot of pavement temperature, 25 mm below the surface, versus time.
Table 3 Effect of reduction in 5°F air temperature on energy consumption and 1 h/8 h ozone concentration (from MIST).
Figure 21 Temperatures (F) in different areas of a parking lot with cars on a weekday. Date: 31 October 2008; Location: Worcester, MA.
Figure 22 Effect of maximum pavement temperature on service life of asphalt pavement (considering high-temperature-related permanent deformation only).
