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:
  Evaluation Pavements, Flexible--Texas--Evaluation Flexible Pavements Mathematical Models 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.
  
  
• Format:
  PDF
• Funding:
  0-5798
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8d78f3ec78be69a84c9d12ba070241981c98f82fc859c4905bde7951ddc7b370aa869f49b9f24e0686eef4aa5bc2e8a60169ad6dbe0ca5a3c02622a8439d2bfc
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18313/dot_18313_DS1.pdf
• File Type:
  [PDF - 5.26 MB ]