REDUCED MIXING TIME FOR ASPHALT CONCRETE: PRACTICAL FIELD EXPERIENCE

AS A RESULT OF 1963-64 STUDIES OF MIXING TIMES IN ASPHALT PLANTS, THE NEW YORK STATE DEPARTMENT OF TRANSPORTATION REDUCED ITS DRY AND WET MIX TIME SPECIFICATION REQUIREMENTS BY VARYING AMOUNTS, DEPENDING ON PLANT SIZE AND MIX TYPE BEING PRODUCED. TYPICALLY, HOWEVER, THESE TIMES NOW TOTAL 10-SEC. DRY AND 35-SEC. WET MIXING, REGARDLESS OF MIX TYPE BEING PRODUCED. INDIVIDUAL PLANT DESIGN AND CONDITION INFLUENCE TIME REQUIREMENTS FOR ADEQUATE DISTRIBUTION AND ASPHALT COATING OF AGGREGATE PARTICLES, NECESSITATING PLANT-BY-PLANT TESTING TO QUALITY FOR NEW REDUCED TIMES. IMPLICATIONS FOR FUTURE MANUFACTURE OF MIXING PLANTS AND FOR PRODUCER EFFICIENCY ARE DISCUSSED. AT PRESENT, ONE-THIRD OF ASPHALT PLANTS SUPPLYING MIX FOR STATE CONTRACTS HAVE REQUESTED AND RECEIVED PERMISSION TO REDUCE MIXING TIME, ACCOUNTING FOR A MAJOR PORTION OF THE MIX BEING PRODUCED. /AUTHOR/

  • Supplemental Notes:
    • Res Rept 68-8, 48 PP, 10 FIG, 7 TAB, 13 REF, 1 APP
  • Corporate Authors:

    New York State Department of Transportation

    1220 Washington Avenue
    Albany, NY  United States  12232
  • Authors:
    • Burnett, W C
    • Thomas, J J
    • Clark, W H
  • Publication Date: 1968-6

Subject/Index Terms

Filing Info

  • Accession Number: 00215153
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Apr 28 1994 12:00AM