Laboratory Dynamic Modulus of Asphalt Mixes and Resilient Modulus of Soils Throughout New Mexico for the Implementation of Mechanistic Empirical Pavement Design Guide (MEPDG): Part 1: Laboratory Dynamic Modulus of Asphalt Mixes

Details

• Creators:
  Weldegiorgis, Mekdim T ; Tarefder, Rafiqul A.
• Corporate Creators:
  University of New Mexico, Albuquerque. Department of Civil Engineering
• Corporate Contributors:
  New Mexico. Department of Transportation. Research Bureau ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Asphalt Mixtures Dynamic Modulus Of Elasticity Laboratory Tests Predictive Models Superpave
• Publication/ Report Number:
  NM11MSC-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; New Mexico
• Edition:
  Final Report
• Corporate Publisher:
  New Mexico. Department of Transportation
• Abstract:
  This report presents dynamic modulus (E*) testing results conducted on three plant-produced and two laboratory-prepared asphalt mixes. The AASHTO TP 62-07 test standard is followed for E* testing. E* mastercurves are developed for all mixes. The E* mastercurve plots show that Superpave (SP) SP II mixes have higher dynamic modulus than SP III mixes. The SP-IV mix exhibits lowest dynamic modulus. The accuracy of test results is insured through independent assurance (IA) tests. One-way analysis of variance (ANOVA) shows that there is no significant difference in E* data obtained from two different laboratories. This confirms that the data reported in this report are accurate. Viscosity based Witczak model, dynamic shear modulus based Witczak model, and the Hirsch model are employed to predict dynamic moduli from mix information. All three models are found to underpredict measured E* values of New Mexico mixes. Model predictions differ from laboratory E* values significantly at high temperatures. An attempt is made in this study to modify the viscosity based Witczak model by giving more emphasis on mix volumetric variables. The modified model shows significant improvements in prediction accuracy over the viscosity based Witczak model. This study recommends the use of mix master curves as well as modified (by UNM) viscosity based Witczak model in the design pavements using Mechanistic Empirical Pavement Design Guide (MEPDG), now called DARWin-ME, in New Mexico.
• Format:
  PDF
• Funding:
  456-325
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fd01801bc7ac418bc0bbf2a4d0b20d90988e8cbe0d36707c1a8b2377a8b9e5847be509453fb02755a95f326de7a8aaf5faf55333c63624cd24d9cec47a3b4f24
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87304/dot_87304_DS1.pdf
• File Type:
  [PDF - 4.41 MB ]