Characterization of Crushed Base Materials in Wyoming

To improve the pavement design and construction in Wyoming, the Wyoming Department of Transportation (WYDOT) is adopting the Mechanistic-Empirical Pavement Design Guide (MEPDG). A full implementation of MEPDG requires the characterization of local crushed base materials. In this research, laboratory experiments on resilient modulus were performed to characterize the local crushed base materials in Wyoming. A comprehensive resilient modulus test program was completed by following the WYDOT modified AASHTO T 307, which incorporates WYDOT design and testing practices. The cyclic triaxial testing chamber for confining load application, two axial load sensors, and two spring-loaded linear variable transducers (LVDTs) to measure the recoverable axial strain of an aggregate specimen were used in determining the laboratory resilient modulus. Effects of moisture content, percent fine, stress, gradation, and fractured face on base resilient modulus were assessed, and estimation models were developed using statistical methods. The coefficients of constitutive models developed by NCHRP (2004) and Hicks and Monismith (1971) were calibrated for the locally available crushed base materials. Finally, a design table and chart for the estimation of base resilient modulus was developed to facilitate the full implementation of the MEPDG in Wyoming.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=936
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/34780
• Supplemental Notes:
  • This report was also published by Mountain Plains Consortium with a publication date of March 2019. Available online at: https://www.ugpti.org/resources/reports/details.php?id=936
• Corporate Authors:

  University of Wyoming, Laramie

  Department of Civil and Architectural Engineering
  1000 East University Avenue
  Laramie, WY  United States  82071

  Wyoming Department of Transportation

  5300 Bishop Blvd.
  Cheyenne, WY  United States  82009-3340

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108
• Authors:
  • Ng, Kam
  • 0000-0001-5099-5454
  • Mebrahtom, Dawit
  • 0000-0003-2256-8193
  • Ksaibati, Khaled
  • 0000-0002-9241-1792
• Publication Date: 2017-8

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Maps; Photos; References; Tables;
• Pagination: 77p

Subject/Index Terms

• TRT Terms: Axial loads; Base course (Pavements); Experiments; Laboratory tests; Local materials; Modulus of resilience; Subgrade materials; Triaxial shear tests
• Identifier Terms: AASHTO T 307; Mechanistic-Empirical Pavement Design Guide
• Geographic Terms: Wyoming
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01667601
• Record Type: Publication
• Report/Paper Numbers: WY-1706F, RS02(216), MPC-19-378
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Apr 27 2018 5:08PM