GAP GRADED BITUMINOUS CONCRETE MIXES

A LABORATORY INVESTIGATION IS MADE ON GAP GRADED BITUMINOUS CONCRETE MIXES. IT IS SHOWN THAT QUITE DENSE MIXES WITH 3/4 INCH MAXIMUM SIZE CAN BE DESIGNED WITH ONE OR MORE SKIPS IN THE COARSE AND FINE AGGREGATE FRACTION. THE WORKABILITY OF SUCH MIXES IS EVALUATED BY MEANS OF A FLOW TABLE TYPE OF TEST. IT IS FOUND THAT SOME OF THE GAP GRADED MIXES HAVE HIGHER DENSITY, LOWER OPTIMUM BINDER CONTENT AND VOIDS IN THE MINERAL AGGREGATES THAN COMPARABLE UNIFORMILY GRADED MIXTURES. IT IS THEREFORE CONCLUDED THAT GAP GRADING CAN BE RESTORED TO FOR ECONOMIC DESIGN OF BITUMINOUS CONCRETE MIXES BY A JUDICIOUS BLENDING OF LOCALLY AVAILABLE AGGREGATES. /RRL/A/

• Record URL:
  http://arrbknowledge.com
• Supplemental Notes:
  • Vol 3, Part 2, PP 1472-1478, 3 TAB, 2 REF
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • SWAMINATHAN, C G
  • Nair, K P
• Conference:
  • Australian Road Research Board Conference Proc
• Publication Date: 1966

Subject/Index Terms

• TRT Terms: Admixtures; Aggregates; Asphalt concrete; Concrete; Concrete tests; Consistency; Density; Economics; Gap grading; Workability
• Subject Areas: Economics; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00211143
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS, ATRI
• Created Date: Apr 27 1970 12:00AM