The Standard Penetration Test (SPT) is critically examined with respect to its ability to estimate relative density in situ. Twenty-six tet specimens, 4-ft in diameter by 6-ft high, were constructed using Reid Bedford Model sand and Ottawa sand. Using field drilling equipment, the SPT was performed at three overburden pressures on test specimens built to various densities. The results are presented as a family of curves correlating relative density with the SPT N-values at the testing pressures. It is concluded that the SPT is fairly repeatable in homogeneous deposits; however, variations in density, structure, or lateral stress within the test medium will produce widely scattered N-values. Thus, estimates of in-situ relative densities from N-values should be considered gross values or trends and should not be interpreted as accurate determinations for any specific case. /Author/

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  • Supplemental Notes:
    • Presented at ASCE Annual Convention and Exposition, Philadelphia, Pa., September 27-October 1, 1976.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Authors:
    • Marcuson III, W F
    • Bieganousky, W A
  • Publication Date: 1977-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00165366
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 12987 Proceeding
  • Files: TRIS
  • Created Date: Mar 7 1978 12:00AM