INTERLABORATORY STUDY OF THE PRECISION OF SOME AGGREGATE TEST METHODS--INTERIM REPORT NO. 2

This report describes the second round of interlaboratory testing carried out in the five M.T.C. Regional laboratories. The purpose of this testing is to investigate the precision of the M.T.C. aggregate test methods and to improve the precision of these test methods by identifying the sources of error. The precision of the test method should be considered when results close to the specification limits are encountered. Each laboratory should re-examine their method of calculating test results. Action must be taken to correct the poor multi-laboratory precision of the Magnesium Sulphate Soundness test for coarse aggregate. The precision of some of the subjective test methods can be improved by conducting a province-wide training session. Benefits: The adoption of these recommendations will result in more valid decisions about aggregate suitability. This will ultimately lead to reduced costs for aggregates. (Author)

• Corporate Authors:

  Ontario Ministry of Transportation & Communic, Can

  1201 Wilson Avenue
  Downsview, Ontario M3M 1J8,   Canada 
• Authors:
  • Rogers, C A
  • Bullen, I
• Publication Date: 1980-7

Media Info

• Features: Figures; Tables;
• Pagination: 61 p.

Subject/Index Terms

• TRT Terms: Accuracy; Aggregates; Errors; Laboratory studies; Magnesium compounds; Materials tests; Soundness test; Specifications; Sulfates; Test procedures
• Uncontrolled Terms: Aggregate testing; Causes
• Subject Areas: Geotechnology; Highways; I36: Aggregates;

Filing Info

• Accession Number: 00335506
• Record Type: Publication
• Report/Paper Numbers: Rpt. EM-38
• Files: TRIS
• Created Date: Sep 16 1981 12:00AM