Development of a catalog of resilient modulus values for aggregate base for use with the mechanistic-empirical pavement design guide (MEPDG).

Details

• Creators:
  Hossain, M. Shabbir ; Lane, D. Stephen
• Corporate Creators:
  Virginia Center for Transportation Innovation and Research
• Corporate Contributors:
  Virginia. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Modulus of resilience
  • Aggregates
  • Mechanistic-empirical pavement design
  • Base course (Pavements)
  • Pavement design
  • Catalogs
• Publication/ Report Number:
  FHWA/VCTIR 15-R13
• Resource Type:
  Tech Report
• Geographical Coverage:
  Virginia
• Corporate Publisher:
  Virginia Center for Transportation Innovation and Research
• Abstract:
  Base aggregate is one of the intermediate layers in a pavement system for both flexible and rigid surfaces. Characterization ; of base aggregate is necessary for pavement thickness design. Many transportation agencies, including the Virginia Department ; of Transportation, assign a layer coefficient for pavement design where consideration for gradation or rock type is not obvious. ; The mechanistic-empirical pavement design requires base aggregate to be characterized using a resilient modulus value. ; Therefore, 16 aggregates from different geophysical regions of Virginia were collected and tested for resilient modulus in order ; to develop a catalog for the implementation of the Mechanistic-Empirical Pavement Design Guide (MEPDG). ; A wide range of resilient modulus values for base aggregate was found for different sources with different rock types. A ; catalog was developed with resilient modulus values for 16 aggregates from Virginia. The resilient modulus values ranged from ; approximately 10,000 to 30,000 psi. In general, limestone showed the higher modulus as compared to granite. An increase in ; compaction moisture content, even within allowable limits, adversely affected the resilient modulus value for many aggregates. ; This moisture sensitivity is related to both the percent of material passing the No. 200 sieve and the plastic nature of these fines. ; These values are recommended to be used as reference values for the MEPDG, but engineering judgment should be applied to ; account for moisture sensitivity.
  More +
• Format:
  PDF
• Funding:
  103762
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28962/dot_28962_DS1.pdf
• File Type:
  [PDF - 857.42 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:15dfa7b1fa95ef72179dde51607eb229eb167781cbc07a38257a7cdd0af58c79