SHEAR STRENGTH OF UNDISTURBED SAMPLES OF DECOMPOSED GRANITE SOIL

The residual soils (called masado in Japan) derived from weathering of granitic rocks are tested to make their shear strength clear by the improved direct shear tests on their undisturbed samples coated by hard gypsum plaster. The shear strength of masado is closely related to two weathering indices; i.e., porosity and ignition loss. The apparent cohesions and the internal friction angles determined by the direct shear tests on small size samples under constant volume and constant normal stress are well in accordance with those determined by the drained triaxial compression tests on large size samples (Shone, et al., 1975). When concerned especially with clayey and silty masados, the failure envelope derived from the direct shear tests under constant volume and constant normal stress is never straight. This is due to the reason that breaking of weathered particles occurs during the shear failure under relatively small normal stress less than 6 kg/sq cm.(a) /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00380806
• Corporate Authors:

  Japanese Society of Soil Mech & Foundation Engrs

  Tokyo,   Japan 
• Authors:
  • Onodera, T
  • Oda, M
  • Minami, K
• Publication Date: 1976-3

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 17-26
• Serial:
  • SOILS AND FOUNDATIONS
  • Volume: 16
  • Issue Number: 1
  • Publisher: JAPANESE GEOTECHNICAL SOCIETY
  • ISSN: 0038-0806

Subject/Index Terms

• TRT Terms: Coefficient of internal friction; Compression; Direct shear tests; Granite; Ignition systems; Porosity; Shear strength; Soils; Strength of materials; Undisturbed samples; Weathered rock; Weathering
• Uncontrolled Terms: Triaxial compression
• Geographic Terms: Japan
• ITRD Terms: 4101: Granite; 8053: Japan; 5938: Porosity; 5531: Shear; 4156: Soil; 5544: Strength (mater); 5281: Weathering
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00147915
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Aug 4 1977 12:00AM