ABSTRACT
ABSTRACT: The influence of pavement type and condition on truck rolling resistance has been examined in a number of studies. These studies show that the rolling resistance does vary, but it is difficult to assess exactly how much can be attributed to the pavement type. By plotting load and deformation from a falling weight deflectometer test a hysteresis curve is obtained. Moreover, the energy losses can be estimated from such a plot. In the present study it was found that the visco-elastic properties of the asphalt had a great influence on the curve. Water present and the subgrade material type also affected the shape of the curve; so, the various properties could be determined. At one site, asphalt concrete and Portland cement concrete pavements were compared. The difference in energy losses between the two pavement types is significant, something which may affect life cycle cost analysis.
