THE ROLE OF FILLER IN BITUMINOUS MIXES

THE INVESTIGATIONS DESCRIBED IN THIS PAPER LEAD TO THE FOLLOWING CONCLUSIONS: (1) THE CONSISTENCY AND DENSIFICATION OF MIXES ARE TO A FIRST APPROXIMATION GOVERNED BY THE APPARENT OR BULK VOLUME OF FILLER, (2) ALL TEST METHODS WHICH GIVE AN INDICATION OF THE APPARENT VOLUME ARE THEREFORE SUITABLE AS FILLER EVALUATION METHODS. THE VOLUME OF FREE BITUMIN LEFT AFTER FILLING VOIDS IN THE FILLER IS A MORE DIRECT MEASURE OF MIX PROPERTIES THAN THE TOTAL VOLUME OF BITUMEN. THE VOLUME OF BITUMIN PRESENT IN THE VOIDS IN THE FILLER CAN BE REGARDED AS A SOLID AND MUST THEREFORE BE SUBTRACTED FROM THE VOIDS IN THE MINERAL AGGREGATE, THUS GIVING THE VOIDS IN THE SOLID PHASE. THE VOIDS IN THE SOLID PHASE ARE SIMPLY RELATED TO THE APPARENT FILLER AND THE FREE BITUMIN PERCENTAGES. THE MARSHALL PROPERTIES OF MIXES ARE SIMPLY RELATED TO THE VOIDS IN THE SOLID PHASE AND THE STONE CONTENT OF THE MIXES. IT IS CLEARLY RECOGNIZED THAT THESE CONCLUSIONS COVER MAIN EFFECTS WHILE SECONDARY EFFECTS HAVE BEEN IGNORED. MOREOVER, NO ATTENTION HAS BEEN PAID TO OTHER ASPECTS OF PRACTICAL PERFORMANCE SUCH AS WATER SENSITIVITY OF FILLERS. THE ROLE OF FILLER IN THE DENSIFICATION AND MECHANICAL BEHAVIOR MIXES, HOWEVER, CAN BE EXPLAINED SATISFACTORILY. /AUTHOR/

• Supplemental Notes:
  • Vol 34, pp 396-429
• Authors:
  • Heukelom, W
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1968-2

Subject/Index Terms

• TRT Terms: Behavior; Bituminous mixtures; Crash investigation; Densification; Fillers (Materials); Studies; Void ratios; Volume
• Old TRIS Terms: Void
• Subject Areas: Highways; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 00210676
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 1 2002 12:00AM