STATISTICAL SIGNIFICANCE OF THE RELATIVE DENSITY

ON THE BASIS OF A SERIES OF LABORATORY TESTS AND A LITERATURE SURVEY, THE MAXIMUM AND MINIMUM DENSITIES FOR THE DETERMINATION OF THE RELATIVE DENSITY OF SANDS INVOLVE RANDOM ERRORS FROM A FRACTION OF ONE PERCENT TO ONE PERCENT, AND SYSTEMATIC ERRORS REACHING SEVERAL PERCENT. CONCERNING RANDOM ERRORS IN DENSITY MEASUREMENTS, THE COEFFICIENT OF VARIATION OF THE RELATIVE DENSITY IS EXPRESSED AS A FUNCTION OF THOSE OF THE SPECIMEN DENSITY AND THE LIMITING DENSITIES. FOR GIVEN DISPERSION IN THE DENSITIES, THE COEFFICIENT OF VARIATION OF THE RELATIVE DENSITY INCREASES RAPIDLY AS THE RELATIVE DENSITY DECREASES. A NUMERICAL ANALYSIS OF THE INFLUENCE OF SYSTEMATIC ERRORS IN THE LIMITING DENSITIES ON THE RELIABILITY OF THE RELATIVE DENSITY SHOWS THAT THE RELATIVE DEVIATION IN THE RELATIVE DENSITY MAY REACH TENS OF PERCENT IF ARBITRARY METHODS ARE USED. IN VIEW OF THE SENSITIVITY OF THE RELATIVE DENSITY TO VARIATIONS IN THE DENSITY MEASUREMENTS, THE NEED FOR RIGIDLY STANDARDIZED TEST METHODS FOR THE LIMITING DENSITIES IS EMPHASIZED, AND CRITERIA FOR THE STANDARD METHODS ARE SUGGESTED. /AUTHOR/

• Supplemental Notes:
  • Presented at the 75th Annual Meeting, Los Angeles, June 25-30, 1972.
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Yoshimi, T
  • Tohno, I
• Publication Date: 1973-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 74-84
• Serial:
  • ASTM Special Technical Publications
  • Issue Number: 523
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Density; Errors; Laboratory tests; Measurement; Numerical analysis; Reliability; Samples; Sand; Significance (Statistics); Specific gravity; Test procedures; Variables
• Old TRIS Terms: Density measurement; Sample (Material); Significance
• ITRD Terms: 5908: Density; 6440: Error; 6136: Measurement; 6251: Sample (mater); 4105: Sand; 6532: Significance (stat); 9086: Variability
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00080554
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Conf Paper, A
• Files: ITRD, TRIS
• Created Date: Feb 27 1975 12:00AM