Evaluation of Deflection Data to Monitor the Structural Performance of Composite Pavements

抄録

Countries around the world have had a gradual increase in the length of Portland cement concrete (PCC) pavement overlaid with hot-mix asphalt (HMA) mixtures in recent years. Evaluation of asphalt overlaid PCC (HMA/PCC) composite pavements is essential to pavement engineers when selecting rehabilitation strategies. Deflection test data is traditionally applied to assess the structural integrity of composite pavements for monitoring their performance. However, available tools for composite pavement are limited in their ability to adequately explain the behavior of composite pavements. A direct and simple procedure is proposed in this study to evaluate the structural performance of HMA/PCC composite pavements. This approach is built on an elastic layer theory to calculate the deflections to consider the influence of the HMA layer overlaid PCC. Test sites using deflection data collected on HMA/PCC composite pavements indicate that the analytic procedures produce reasonable results that are consistent with those obtained from field.