FOR A STATISTICAL CONTROL OF CRUSHER RUN MATERIAL FOR DENSE GRADED MIX

IMPROVEMENTS IN THE QUALITY OF ROAD MATERIALS CAN ONLY BE ACHIEVED BY THE USE OF STATISTICAL CONTROL METHODS. IN THE COURSE OF AN ACCEPTANCE CONTROL OF 0-12,5 MILLIMETER CRUSHER -RUN MATERIAL, THE AUTHOR HAS TRIED THROUGH STATISTICAL ANALYSIS TO ESTABLISH' 1/ THAT THERE WAS A CORRELATION BETWEEN DRY AND WET SIEVINGS AND THAT THE SIGNIFICANT DIFFERENCE WAS SMALL UP TO THE 2 MILLIMETER SIEVE, 2/ THAT A GOOD APPROXIMATION OF THE SAMPLES AVERAGE GRADING CURVE COULD BE OBTAINED BY MIXING AND THEN QUARTERING THROUGH A REDUCING SAMPLER, 3/ THAT THE SIZE OF THE CONTROLLED MATERIAL UNIT BEING TAKEN AS A CUBIC METER, ONE COULD OBTAIN ITS AVERAGE GRADING WITH A GOOD DEGREE OF APPROXIMATION BY TAKING 5 SAMPLES OF ABOUT 4 POUNDS EACH AND DETERMINING THEIR AVERAGE GRADING, 4/ THAT THERE IS A CORRELATION BETWEEN THE 2 MILLIMETER DRY SIEVING AND THE FILLER CONTENT /WET/ AND THAT A POSSIBILITY OF INDIRECT CONTROL OF THE GREATEST VARIATIONS OF THE FINES CONTENT CAN BE INFERRED. THESE CONCLUSIONS COULD LEAD TO STANDARDS FOR A SIMPLE SPECIFICATION OF /OR ACCEPTANCE/ STATISTICAL CONTROL FOUNDED ON THE KNOWLEDGE OF A SIMPLIFIED GRADING /3 OR 4 SIEVES/ THROUGH DRY SIEVING AND ON THE CREATION OF CONTROL CARDS.

  • Supplemental Notes:
    • No11, Pp2.1-2.12, 6FIG, 4TAB, 4PHOT
  • Authors:
    • Lefebvre, J P
  • Publication Date: 1965-1

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Filing Info

  • Accession Number: 00214566
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jan 20 1970 12:00AM