A STUDY OF TESTING VARIANCE IN SIZE DISTRIBUTION ANALYSIS OF COARSE AGGREGATE

THREE DIFFERENT COARSE AGGREGATES WERE SUBJECTED TO SIEVE ANALYSIS IN 15 LABORATORIES, WITH TWO OPERATORS IN EACH LABORATORY EACH MAKING THREE DETERMINATIONS ON EACH MATERIAL. STATISTICAL ANALYSIS OF THE RESULTS INDICATED THAT: (1) MATERIAL TYPE, OPERATORS, AND LABORATORY/MATERIAL INTERACTION DID NOT SIGNIFICANTLY EFFECT THE RESULTS: (2) RESULTS WERE SIGNIFICANTLY DIFFERENT IN DIFFERENT LABORATORIES; (3) OVER-ALL VARIANCE IN THE LABORATORY STUDY IN ONE LABORATORY WAS SIGNIFICANTLY SMALLER THAN WHEN THE SAME AGGREGATES WERE SAMPLED AT PLANT, STOCKPILE, AND JOB SITE, FOR THE MATERIAL PASSING THE ONE-HALF- INCH SIEVE; (4) WITHIN A LABORATORY THERE WERE SIGNIFICANT DIFFERENCES BETWEEN DIFFERENT BATCHES FROM THE SAME STOCK-PILE; (5) WITHIN A BATCH, BOTH INHERENT AND SAMPLING VARIANCES WERE SIGNIFICANT COMPONENTS OF THE OVER-ALL VARIANCE; AND (6) THE TESTING VARIANCE WAS SMALL COMPARED TO THE OVER-ALL VARIANCE FOR PERCENTAGE PASSING THE ONE-HALF-INCH SIEVE, BUT INCREASED RAPIDLY FOR THE PERCENTAGE PASSING SIEVE SIZES NO. 4 AND NO. 8. /FHWA/

• Corporate Authors:

  Ohio State University, Columbus

  Transportation Research Center
  2070 Neil Avenue
  Columbus, OH  United States  43210

  Ohio Department of Transportation

  1980 West Broad Street
  Columbus, OH  United States  43223
• Authors:
  • Majidzadek, K
  • Salaam, U
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Coarse aggregates; Sieve analysis; Size; Statistical analysis; Variance
• Subject Areas: Data and Information Technology; Geotechnology; Highways;

Filing Info

• Accession Number: 00217503
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT, STATEDOT
• Created Date: Apr 17 1973 12:00AM