OVERLOADS ON EXPOSED CEMENT TREATED BASES

THE EFFECTS OF OVERLOADS ON NEWLY CONSTRUCTED CEMENT TREATED BASES (CTB), WHICH ARE UTILIZED AS HAUL ROADS DURING PORTLAND CEMENT CONCRETE (PCC) PAVING WERE EVALUATED. TEN WHEEL DUMP TRUCKS WERE USED TO TRANPORT 8 CUBIC YARD BATCHES OF PLASTIC PCC. SINGLE AXLE LOADS UP TO 20 KIPS WERE PERMITTED ON A TRIAL BASIS. A NET LOSS OR GAIN IN STRENGTH OR A WEAKENING OF THE CTB AS A RESULT OF OVERLOAD HAULING WAS DETERMINED USING SURFACE DEFLECTION MEASUREMENTS BOTH BEFORE AND AFTER THE HAULING OPERATIONS. CONDITION SURVEYS WERE ALSO PERFORMED TO EVALUATE SURFACE DAMAGE AND CRACKING. EQUIVALENT 5,000 POUND WHEEL LOADS WERE DETERMINED FROM AXLE WEIGHTS AND DAILY TRUCK COUNTS. THESE DATA WERE COLLECTED ON FOUR PAVING PROJECTS. IT WAS CONCLUDED THAT OVERLOADS UP TO 20 KIPS PER AXLE ARE NOT DETRIMENTAL TO NEWLY PLACED CTB WHEN THE AVERAGE HAUL PERIOD IS FROM 3 TO 6 DAYS. RECOMMENDATIONS COVERING OVERLOAD HAULING ARE SUGGESTED FOR INCORPORATION IN A TENTATIVE SPECIFICATION.

  • Corporate Authors:

    California Division of Highways

    Materials and Research Department
    Sacramento, CA  USA  95819

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Sherman
    • Matthews
    • Hannon
    • Spickelmire
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00230758
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: D-5-39
  • Files: TRIS, USDOT
  • Created Date: Aug 15 2004 2:22AM