THE EFFECTS OF CONTAMINANTS IN BITUMEN-AGGREGATE MIXTURES

THE EFFECTS WERE DETERMINED THAT CONTAMINANTS HAVE VARIOUS ALASKAN AGGREGATE STRIPPING CHARACTERISTICS, WHICH WERE COMPARED WITH THE AASHO T-182 TEST METHOD OF QUANTITATIVELY DETERMINING THE DEGREE OF ASPHALT RETENTION WITH THE TRACER SALT PROCEDURE ADOPTED BY ASTM AND LATER MODIFIED BY THE CALIFORNIA HIGHWAY DEPARTMENT. THE AGGREGATES CHOSEN REPRESENT THE BROAD SPECTRUM OF THOSE NOW USED FOR PAVING, THROUGHOUT THE STATE. THE BITUMENS EMPLOYED IN THIS INVESTIGATION ARE THOSE MOST COMMONLY DESIGNATED BY THE STATE FOR PAVING PURPOSES AND THEY INCLUDE ASPHALT CEMENT, CUTBACK ASPHALT AND AN EMULSIFIED ASPHALT. THE PRODUCTS ELECTED AS CONTAMINANTS WERE CHOSEN ON THE BASIS OF THEIR PROBABILITY OF OCCURRENCE IN AGGREGATES USED FOR ASPHALT PAVEMENTS. THIS STUDY INCLUDES BOTH ADVERTENT AND INADVERTENT CONTAMINATION (COAL, DIESEL FUEL, SEA WATER, PORTLAND CEMENT, LIGHT OIL, AND AN ANTI-STRIPPING AGENT). THE RESULTS INDICATE THAT CONTAMINATION MAY RETARD STRIPPING OR HAVE NO ADVERSE EFFECTS UPON BITUMEN-AGGREGATE MIXTURES WHEN THE CONTAMINATION AMOUNTS TO NO MORE THAN ONE PER CENT OF THE MOISTURE. /AUTHOR/

  • Supplemental Notes:
    • Hpr-1(5), ITEM NO 7, STATE NO L-12105
  • Corporate Authors:

    Alaska Department of Highways

    Pouch Z
    Juneau, AK  USA  99801

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  USA  20590
  • Authors:
    • Head, R W
    • Duncan, W E
  • Publication Date: 1968-6

Subject/Index Terms

Filing Info

  • Accession Number: 00210400
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Nov 12 2003 12:00AM