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- W592195464 abstract "It is widely accepted that a change in thickness on one of the pavement layers, primarily the surface layer, has a considerable impact on the performance that the pavement will exhibit. It is therefore important to characterize the variability of pavement layer thickness so that the performance of a pavement structure not only considers the mean/target design thickness, but also accounts for the effect of spatial thickness variation. This study focuses on Long Term Pavement Performance (LTPP) SPS-1 sections located in the State of Texas for the purpose of determining the thickness distribution associated with the HMA surface layer, the HMA binder course, and the granular base layer, by means of GPR data. Results from previous research and visual analysis indicate that pavement layers are normally distributed. Therefore, tests for determining normal goodness-of-fit were used in assessing the hypothesis that the thickness data for each individual analyzed layer can come from a normal distribution. The results indicate that 86.1% of the analyzed pavement layers have normally distributed thicknesses. An analysis of the thickness changes that occur within a given section as measured along the lane centerline and under the right wheel-path was also performed. Finally, based on the coefficient of variation identified for the HMA surface and granular base layers, a sensitivity analysis was performed using the Mechanistic-Empirical Pavement Design Guide (M-E PDG). The results show a considerable change in distress, mainly fatigue cracking, as the layer thicknesses change within a range of +/- 3 standard deviations from the mean thickness." @default.
- W592195464 created "2016-06-24" @default.
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- W592195464 date "2009-01-01" @default.
- W592195464 modified "2023-09-23" @default.
- W592195464 title "Sensitivity Analysis of the MEPDG Using Measured Probability Distributions of Pavement Layer Thickness" @default.
- W592195464 hasPublicationYear "2009" @default.
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