THE ROLE OF THE FILLER IN BITUMINOUS MIXTURES /IN GERMAN/

THE MIXING IN OF FILLERS CAUSES A DECREASE OF VOIDS IN BITUMINOUS MIXTURES, AND THEREFORE INFLUENCES THE MECHANICAL PROPERTIES AND THE WORKABILITY. WHILE A GREAT DEAL OF INFORMATION IS AVAILABLE ABOUT THE EFFECT OF THE AMOUNT OF FILLER, LITTLE IS KNOWN ABOUT THE INFLUENCE OF THE TYPE OF FILLER. THEREFORE INVESTIGATIONS HAVE BEEN CARRIED OUT BY A DUTCH COMMISSION ON THE SIGNIFICANCE OF THE FILLER AND THE FILLER-BITUMEN RATIO, AND THE RESULTS OF THESE TESTS ENABLE AN EVALUATION OF MINERAL FILLERS TO BE MADE ON THE BASIS OF DIFFERENT TEST METHODS. IT HAS BEEN SHOWN THAT THE WORKABILITY AND THE DEGREE OF COMPACTION OF BITUMINOUS MIXTURES DEPENDS TO A GREAT EXTENT ON THE APPARENT VOLUME OF THE FILLER; THEREFORE THE EVALUATION OF FILLERS METHODS CAN BE USED BY WHICH THE APPARENT VOLUME OF THE FILLER CAN BE DETERMINED. THE SURPLUS BITUMEN WHICH STILL REMAINS AFTER THE VOIDS OF THE FILLER HAVE BEEN FILLED IN IS MORE DECISIVE FOR THE PROPERTIES OF THE MIXTURES THAN THE TOTAL VOLUME OF THE BITUMEN. THE PROPORTION OF BITUMEN WHICH FILLS IN THE PORES OF THE FILLER COUNTS AS A FIRM SUBSTANCE, AND THEREFORE DECREASES THE PORE CONTENT OF THE MINERAL MIXTURE. THERE IS A DIRECT RELATION BETWEEN THE POROSITY AND THE MARSHALL STABILITY, AS WELL AS THE MODULUS OF RIGIDITY. /FG/RRL/

• Supplemental Notes:
  • Vol 29, No 3, PP 61-68, 10 PHOT, 11 REF
• Authors:
  • Heukelom, W
• Publication Date: 1967

Media Info

• Serial:
  • Bitumen /Germany/

Subject/Index Terms

• TRT Terms: Bitumen; Bituminous mixtures; Compaction; Fillers (Materials); Marshall test; Mineral fillers; Porosity; Shear modulus; Workability
• Old TRIS Terms: Marshall stability marshall stability & flow test flow
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211098
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Aug 26 1970 12:00AM