Abstract

Layers moduli are very crucial parameters for pavement design and evaluation with a mechanistic-empirical method. Falling Weight Deflectometer (FWD), as a nondestructive testing technology, is an effective tool to determine asphalt pavement layer moduli. The objective of this study was to establish a method to predict structural layer moduli of cement treated base (CTB) asphalt pavements by using FWD deflection basin parameter (DBP) indicators. Firstly, a general dynamic finite element model of CTB asphalt pavements was established and a synthetic database of dynamic DBP indicators corresponding with material properties of structural layers was generated. Secondly, the relationship between DBP indicators and structural layer moduli was discussed by the related coefficient, then the optimal regression function was established to predict structural layer moduli. Finally, the presented method was applied to predict structural layer moduli of the existing CTB asphalt pavement of Shanghai A11 Expressway and its validity was verified by the fitting degree between the measured deflection basin and the theoretical deflection basin. The research results provide a technology supports to popularize FWD testing technology applied in evaluating structural performance of CTB asphalt pavements.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.