STATISTICAL PARAMETERS RESEARCH PROJECT QUALITY CONTROL STUDY ON ASPHALT PAVEMENT RESEARCH PROJECT

THIS REPORT SUMMARIZES THE STATISTICAL PARAMETERS CALCULATED FROM THE RESULTS OF LABORATORY TESTS UPON 200 SAMPLES OBTAINED OVER A 12,600 FOOT SECTION /4,297 TONS/ OF THE INTERMEDIATE COURSE OF A TYPICAL 3 COURSE ASPHALT PAVEMENT. THE SAMPLES CONSISTED OF TWO ORIGINAL PAIRS OF 6 INCH CORES AND TWO DUPLICATE PAIRS, TAKEN AT 50 RANDOMLY SELECTED SITES. TESTS WERE RUN IN THE CENTRAL LABORATORY FOR THICKNESS, CONVENTIONAL DENSITY, ASPHALT CONTENT, GRADUATION, NUCLEAR DENSITY AND AIR VOID CONTENT. A STATISTICAL ANALYSIS OF VARIANCE WAS RUN UPON THE TEST DATA TO OBTAIN THE TESTING, SAMPLING, MATERIAL AND TOTAL VARIANCE COMPONENTS. STANDARD DEVIATION, MEAN, MEDIAN, MODE, AND RANGE WERE ALSO CALCULATED. SIEVE ANALYSES ON EXTRACTED AGGREGATES WERE RUN IN ACCORDANCE WITH THE AASHO T-30 TEST METHOD. ANALYSIS OF VARIANCE WAS RUN ON EXTRACTED AGGREGATED DATA TO STUDY THE RELATION BETWEEN THE PERCENT PASSING THE NO. 4 SIEVE AND THE CORRESPONDING ASPHALT CONTENT OF SAMPLES CORES TAKEN FROM THE 50 TEST SITES. IT WAS ESTIMATED THAT A 1% VARIATION IN THE MINUS 4 AGGREGATE WILL RESULT IN A CORRESPONDING 0.1% VARIATION IN ASPHALT CONTENT. STANDARD DEVIATIONS CALCULATED FOR ALL SIZED OF AGGREGATES FROM MINUS 4 TO MINUS 200 SHOWED THAT THE STATE TOLERANCES FOR THESE SIZED ARE VERY CLOSE TO THE THEORETICAL VALUES. /BPR/

  • Supplemental Notes:
    • Hpr, Bpr-1407, STATE -4
  • Corporate Authors:

    Colorado Department of Highways

    Planning and Research Division, 4201 East Arkansas Avenue
    Denver, CO  USA  80222
  • Publication Date: 1967-7

Subject/Index Terms

Filing Info

  • Accession Number: 00214457
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Sep 15 1994 12:00AM