MEASUREMENT OF SUBGRADE BEARING VALUE USING JAPANESE BALL- DROP TEST

THE JAPANESE BALL-DROP TEST USED ALONG WITH THE STANDARD IN-SITU CBR TEST IS DESCRIBED FOR EVALUATION OF SUB-GRADES DURING THE PREPARATION OF A TEST BED. THE JAPANESE TEST CONSISTS OF DROPPING A SPHERICAL BALL OR AN EQUIVALENT BODY FROM A PREDETERMINED HEIGHT THROUGH A GUIDE AND MEASURING THE DIAMETER OF THE DEPRESSION (D) PRODUCED ON THE SURFACE OF THE SOIL, WHICH IS CORRELATED TO THE BEARING VALUE OF THE SOIL. EARLIER RESULTS BASED ON TESTS ON SANDY AND LOAMY SOIL OF JAPAN INDICATED A GOOD RELATION BETWEEN CBR AND D VALUES. RESULTS REPORTED IN THIS PAPER PERTAIN TO TESTS CONDUCTED ON TWO TYPES OF SOIL, ONE A TYPICAL BLACK COTTON SOIL AND THE OTHER A SAND-CLAY MIXTURE. THEY INDICATE A SIGNIFICANT LINEAR CORRELATION BETWEEN THE D VALUE FROM THE JAPANESE APPARATUS AND THE IN-SITU CBR. /RRL/

  • Availability:
  • Supplemental Notes:
    • Vol 41, No 2, PP 79-82, 3 FIG, 1 TAB, 3 PHOT, 2 REF
  • Corporate Authors:

    N/A

    ,   United States 
  • Authors:
    • Rao, N M
    • Ghorpade, V B
  • Publication Date: 0

Media Info

  • Serial:
    • Indian Concrete Journal
    • Volume: 33
    • Issue Number: 7
    • Publisher: Associated Cement Companies Limited
    • ISSN: 0019-4565

Subject/Index Terms

Filing Info

  • Accession Number: 00229235
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Aug 15 2004 2:38AM