DEVELOPMENT OF TEST PROCEDURE FOR THE DESIGN OF BLACK BASE

There is no standard design procedure available for black base mixes containing aggregates larger than 1" (25.4 mm). This investigation dealt with the use of stability testing equipment similar to that used in the design of surface mixes and development of a compaction procedure for 6" (152.4 mm) diameter specimens. A compaction procedure was developed that could be used with slight modification to duplicate field densities. The trends of the VTM and VFA curves appear promising as an indicator of the proper asphalt content; however, the inherent variability of the stability measurement eliminates it as a design criterion. /FHWA/

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• Record URL:
  https://rosap.ntl.bts.gov/view/dot/18723
• Corporate Authors:

  Virginia Highway and Transportation Research Council

  Charlottesville, VA  United States 
• Authors:
  • Maupin Jr, G W
• Publication Date: 1976-6

Media Info

• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt content; Bituminous aggregates; Bituminous bases; Compaction; Field density; Mix design; Stability (Mechanics); Test procedures; Testing equipment
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00141899
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA-RD-M-0321 Final Rpt.
• Contract Numbers: Contract HRP-1178
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Jun 22 1977 12:00AM