Resilient Modulus Values for Base Aggregate from Virginia

Base aggregate is one of the intermediate layers in the pavement system for both flexible and rigid surfaces. Their characterization is necessary for pavement thickness design. Many agencies, including 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, sixteen aggregates from different geo-physical regions of Virginia were collected and tested for resilient modulus to develop a catalog for the implementation of the mechanistic- empirical pavement design guide (MEPDG). A wide variation of resilient modulus values for base aggregate was observed among different sources with different rock types. The resilient modulus values ranged from approximately 10,000 to 30,000 psi. In general, limestone showed the higher modulus as compared to granite. 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 amount of material passing #200 sieve and the plastic nature of these fines.

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• Supplemental Notes:
  • This paper was sponsored by TRB committee AFP70 Mineral Aggregates.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Hossain, M Shabbir
  • Lane, D Stephen
• Conference:
  • Transportation Research Board 94th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2015-1-11 to 2015-1-15
• Date: 2015

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 17p
• Monograph Title: TRB 94th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregates; Base course (Pavements); Mechanistic-empirical pavement design; Modulus of resilience; Pavement layers
• Geographic Terms: Virginia
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I36: Aggregates;

Filing Info

• Accession Number: 01553802
• Record Type: Publication
• Report/Paper Numbers: 15-4755
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Feb 23 2015 9:21AM