Critical Inputs for Pavement Rehabilitation in the Pavement M-E
The new Mechanistic-Empirical Pavement Design Guide (MEPDG) and currently referred to as DARWin-ME/Pavement-ME can be used to design different flexible and concrete rehabilitation alternatives; namely hot mix asphalt (HMA) over HMA (overlay), HMA over jointed plain concrete pavement (JPCP) (composite), HMA over JPCP fractured (rubblized), JPCP over JPCP (unbonded overlay), and others. Each rehabilitation option has different input variables to characterize new and existing layers. Some of these input types and their magnitudes have significant impact on the predicted pavement performance. In order to evaluate the impact of various design inputs on the predicted performance for the rehabilitation options, a set of sequential analyses were performed. While the preliminary sensitivity analysis investigated the input variables specific to the existing pavement layers, a detailed sensitivity analysis was performed to identify significant main and interactive effects between input variables related to overlay and existing pavement layers. In addition, global sensitivity analyses identified the significance variables in impacting the pavement performance by considering the entire problem domain. The results of the analyses show that for the HMA rehabilitation option, HMA overlay thickness and volumetrics are the most significant inputs for the overlay layer while the existing layer thickness and surface condition rating have a significant effect on the pavement performance among the inputs related to the existing pavement structure. For Portland cement concrete (PCC) unbonded overlays, all overlay related inputs significantly impact the predicted cracking performance while the existing PCC elastic modulus is the most important among inputs related to existing layers. The interaction between overlay air voids and existing pavement thickness significantly impacts all performance measures among HMA rehabilitation options. The interaction between overlay thickness and existing PCC layer modulus has the most significant effect on unbonded overlay predicted performance. The paper highlights the process of identifying the most sensitive input variables for rehabilitation design options. The results of the study can assist in highway agencies’ on-going efforts to implementing the DARWin-ME, especially when the most of pavement designs are related to rehabilitation of the existing highways.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFD70 Pavement Rehabilitation. Alternate title: Critical Inputs for Pavement Rehabilitation in Pavement M-E
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Haider, Syed Waqar
- Harsini, Iman
- Brink, Wouter C
- Buch, Neeraj
- Chatti, Karim
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Conference:
- Transportation Research Board 93rd Annual Meeting
- Location: Washington DC
- Date: 2014-1-12 to 2014-1-16
- Date: 2014
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 18p
- Monograph Title: TRB 93rd Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Composite pavements; Hot mix asphalt; Mechanistic design; Modulus of elasticity; Overlays (Pavements); Pavement design; Pavement maintenance; Pavement performance; Portland cement concrete; Rehabilitation; Sensitivity analysis; Thickness; Volumetric analysis
- Identifier Terms: DARWin-ME (Computer program); Mechanistic-Empirical Pavement Design Guide
- Uncontrolled Terms: Jointed plain concrete pavements; Rubblized concrete pavements; Unbonded concrete overlays
- Subject Areas: Design; Highways; Maintenance and Preservation; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I32: Concrete; I33: Other Materials used in Pavement Layers; I60: Maintenance;
Filing Info
- Accession Number: 01516213
- Record Type: Publication
- Report/Paper Numbers: 14-5037
- Files: TRIS, TRB, ATRI
- Created Date: Feb 28 2014 12:32PM