Abstract
This report describes several methods to extract pavement thermal diffusivity from pavement temperature measurements at two or more depths. Two methods use analytic solutions for heat transfer in an infinite solid to relate the attenuation of diurnal temperature change with depth to thermal diffusivity. The first approach considers the surface temperature forcing to be a simple sinusoidal function with a period of one day. The second method considers the surface temperature forcing to be a general periodic signal that can be decomposed with a Fourier series. The accuracy of these two methods are limited by nonhomogeneous nature of pavement/subgrade/soil systems. The third method uses a onedimensional finite difference heat transfer model to extract thermal diffusivity from measured pavement temperature. This method requires more computational effort, but can take into account the variation in thermal diffusivity between the pavement and underlying layers.
Original language  English (US) 

State  Published  Sep 2006 
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Dive into the research topics of 'Extraction of pavement and soil thermal diffusivity from measured temperature times series'. Together they form a unique fingerprint.University Assets

St. Anthony Falls Laboratory
Lian Shen (Director)
St. Anthony Falls LaboratoryEquipment/facility: Facility