Development, calibration, and validation of performance prediction models for the Texas M-E flexible pavement design system.

Details

• Alternative Title:
  Project title: Develop test procedures to characterize material response behavior and transfer functions for TxDOT M-E design
• Creators:
  Zhou, Fujie ; Fernando, Emmanuel ; Scullion, Tom
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Flexible pavements
  • Mathematical models
  • Evaluation Pavements, Flexible--Texas--Evaluation
  • Pavements, Flexible--Texas--Mathematical models
• Publication/ Report Number:
  FHWA/TX-10/0-5798-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Sept. 2008-Aug. 2009.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  This study was intended to recommend future directions for the development of TxDOT’s Mechanistic-Empirical ; (TexME) design system. For stress predictions, a multi-layer linear elastic system was evaluated and its validity was ; verified by comparing the measured tensile strains under accelerated pavement (ALF) loading with the computed ; values. After reviewing all existing pavement performance models, the VESYS model was recommended for predicting ; flexible pavement layer rutting and an Overlay Tester-based fatigue cracking model was proposed, which includes both ; crack initiation and propagation models. ; For hot-mix asphalt (HMA) rutting predictions, the dynamic modulus test and repeated load test are proposed to ; provide material properties. The proposed HMA rutting model was calibrated using the rutting data from the NCAT ; test track and the Texas LTPP-SPS 5 test sections. The proposed fatigue cracking models were calibrated with ; performance data from NCAT. Resilient modulus and permanent deformation testing is recommended for base and ; subgrade materials and future research efforts are required to improve the repeatability of the permanent deformation ; test. For stabilized bases the traditional fatigue models are recommended and calibration factors were proposed based ; on existing accelerated pavement test data. ; A field experiment was conducted to evaluate the adequacy of the LoadGage program to compute allowable axle ; load limits for thin pavements. On sections trafficked to failure, very good results were obtained when moisture ; correction factors were applied to the laboratory measured engineering properties. Implementation should proceed by ; incorporating the proposed models and default material properties into a design software package, upgrading the ; available repeated load equipment, performing additional calibration, and developing additional default values for a ; w ider range of Texas materials.
  More +
• Format:
  PDF
• Funding:
  0-5798
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18313/dot_18313_DS1.pdf
• File Type:
  [PDF - 5.26 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8d78f3ec78be69a84c9d12ba070241981c98f82fc859c4905bde7951ddc7b370aa869f49b9f24e0686eef4aa5bc2e8a60169ad6dbe0ca5a3c02622a8439d2bfc