INVESTIGATION OF ADDITIVE EFFECTS ON FJ-1 WEARING MIXTURES

A STUDY WAS CONDUCTED TO DETERMINE THE EFFECTS OF VARIOUS ADDITIVES ON THE PHYSICAL PROPERTIES OF THE PENNSYLVANIA FJ- 1 SAND-ASPHALT MIXTURE. THIRTEEN ADDITIVES WERE INVESTIGATED, EACH AT THREE ASPHALT CONTENTS AND THREE PERCENTAGE LEVELS OF ADDITIVE IN THE STANDARD AGGREGATE MIX. THE PHYSICAL PROPERTIES MEASURED WERE MARSHALL STABILITY AND FLOW VALUE, PERCENT AIR VOIDS, MINERAL VOIDS, VOIDS FILLED WITH ASPHALT AND DENSITY. FOR THE ONE AGGREGATE GRADATION USED IT WAS FOUND THAT: (1) LIMESTONE FILLER PRODUCED LITTLE OR NO BENEFITS, (2) LIME-FLY ASH AND ASBESTOS PRODUCTS CONTRIBUTED TO IMPROVED MIXTURE QUALITIES AT THE ONE PERCENT LEVEL, (3) ASBESTENE FILLER IMPROVED QUALITIES AT ALL LEVELS (4) RUBBER ADDITIVES PRODUCED FROM LITTLE IMPROVEMENT TO DETRIMENTAL RESULTS, AND (5) POLYETHLENE ADDITIVES GREATLY IMPROVED THE PROPERTIES OF THE MIXTURE AND WARRENTS FURTHER STUDY. TESTS RESULTS ALSO DEMONSTRATE THAT AS THE FINENESS OF ASBESTENE INCREASED SO DID STABILITY AND FLOW VALUES. /BPR/

  • Supplemental Notes:
    • Hpr-1(4), STUDY IDENT NO ITEM 5
  • Corporate Authors:

    Pennsylvania Department of Highways

    400 North Street
    Harrisburg, PA  USA  17120-0095

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Kofalt, J A
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00206336
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Dec 6 1994 12:00AM