DESIGNING FINE BITUMINOUS MIXTURES FOR HIGH SKID RESISTANCE

THE RESULTS OBTAINED ON A WIDE VARIETY OF SAND MIXES USING THE LABORATORY SKID-RESISTANCE MACHINE DEVELOPED EARLIER AT PURDUE UNIVERSITY ARE PRESENTED. VARIABLES IN THE STUDY INCLUDE MINERAL COMPOSITION, PARTICLE SHAPE, AND GRADATION OF THE AGGREGATE COMPOSING THESE FINE BITUMINOUS MIXTURES. IT HAS BEEN DETERMINED THAT THE LABORATORY RELATIVE RESISTANCE VALUE (SKID RESISTANCE) OF A FINE BITUMINOUS PAVEMENT MIXTURE IS CLOSELY RELATED TO THE AGGREGATE CHARACTERISTICS WHICH DETERMINE THE SURFACE TEXTURE OF THE MIXTURE. MINERAL COMPOSITION OF THE AGGREGATE IS IMPORTANT IN DETERMINING THE SURFACE CHARACTER OF THE AGGREGATE PARTICLES AND, AS SUCH, AFFECTS THE RELATIVE RESISTANCE VALUE OF THE PAVEMENT. MIXTURES MADE FROM ANGULAR SILICA SAND EXHIBITED INITIALLY HIGHER SKID RESISTANCE THAN THOSE MADE FROM ROUNDED SILICA. BUT THESE SHARP EDGES WERE NOT MAINTAINED, SO THAT, AFTER A DEGREE OF WEAR, MIXTURES MADE WITH ROUNDED AGGREGATE SHOWED SUPERIOR RESULTS. AGGREGATE GRADATION IS A MOST IMPORTANT FACTOR AND SHOWS MUCH PROMISE AS A CONTROL FOR DETERMINING THE SKID-RESISTANCE QUALITY OF PAVEMENTS. HIGHER SKID-RESISTANCE VALUES WERE FOUND FOR THE MIXTURES MADE FROM FINER GRADUATIONS. FINENESS MODULUS CAN BE USED FOR PREDICTING SKID-RESISTANCE VALUES, BUT DIFFERENT CURVES MUST BE USED AS THE MAXIMUM AGGREGATE SIZE CHANGES. /AUTHOR/

  • Supplemental Notes:
    • Vol 39, pp 173-190, 7 FIG, 3 TAB, 11 PHOT, 8 REF
  • Authors:
    • Stephens, J E
    • Goetz, W H
  • Publication Date: 1960

Media Info

  • Monograph Title: Proceedings of the Thirty-Ninth Annual Meeting of the Highway Research Board, Washington, D.C., January 11-15, 1960
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00211643
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 29 1971 12:00AM