RECORDATION OF QUANTITIES OF MATERIALS INCORPORATED IN BASE AND PAVEMENT PLANT MIXTURES (FINAL REPORT OF SECOND PHASE)

THIS IS THE SECOND PHASE OF RESEARCH TO DEVELOP AN INDEPENDENT MONITORING AND RECORDING SYSTEM. A SYSTEM THAT WILL PROVIDE A RECORD OF THE WEIGHTS OF EACH INGREDIENT FOR EACH BATCH PRODUCED IN WEIGHT PROPORTIONING BATCH PLANTS, COMPLETELY INDEPENDENTLY FROM THE PLANT OPERATING SYSTEM. IN THIS PHASE A PROTOTYPE SYSTEM INCLUDING FOUR LOAD CELLS SUPPORTING EACH WEIGHT HOPPER, ACTING INDEPENDENTLY FROM THE PLANT LEVER SYSTEM, WAS INSTALLED ON A COMMERCIALLY OPERATED, FULLY AUTOMATED TRANSLATED THROUGH PROCESSING INSTRUMENTATION INTO BOTH A PRINTED TABULATION AND PUNCHED TAPE RECORD FOR EACH BATCH. THE SYSTEM WAS OPERATED FOR A THIRTEEN MONTH PERIOD DURING WHICH NUMEROUS OBSERVATIONS AND COMPARATIVE WEIGHING TESTS WERE MADE. THE PROTOTYPE SYSTEM, REFERRED TO AS THE "MONITOR" WAS NEVER IN ERROR COMPARED TO DEAD WEIGHTS AND IS AT LEAST AS RELIABLE AS PRESENT PLANT SCALES. THE MECHANICAL PROBLEMS, CONSIDERING THAT IT WAS A PROTOTYPE, WERE NEGLIBIBLE AND CORRECTABLE. THE RECORDED WEITHTS ACCURATELY REPRESENTED THE AMOUNT OF MATERIAL ACTUALLY DELIVERED TO THE WEIGH HOPPER REGARDLESS OF PLANT SCALE SETTINGS OR BEHAVIOR AND CANNOT BE INFLUENCED BY THE OPERATOR. THE MONITOR IS A RELATIVELY INEXPENSIVE, EASILY INSTALLED, ACCURATE WEIGHTING AND RECORDING SYSTEM WHICH CAN GIVE VITAL SURVEY INFORMATION OF THE PLANT OPERATION AND COULD FURNISH AN ALTERNATIVE METHOD OF DETERMINING CONTRACT PAY QUANTITIES.

  • Supplemental Notes:
    • Rept NOF412-2
  • Corporate Authors:

    Pitt, Norman, Incorporated

    ,    

    California Department of Transportation

    1120 N Street
    Sacramento, CA  USA  95814
  • Authors:
    • Pitt, N
    • Racheli, U
    • Obermuller, J C
    • Spickelmire, L S
  • Publication Date: 1972-6

Media Info

  • Pagination: 95 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00214561
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Final Rept
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: May 7 1974 12:00AM