EFFECTIVE STRESS-STRENGTH BEHAVIOR OF COMPACTED STABILIZED SOILS
Consolidated-undrained triaxial tests are used to investigate the strength behavior of two compacted saturated soils stabilized with lime and cement. The results show that the Mohr-Coulomb envelopes in terms of effective stresses are straight lines for both the untreated and the stabilized soils over a wide range of consolidation pressures (0 to 50 kb/cm sq). The effective angle of shearing resistance is independent of molding conditions and curing time, but its magnitude depends on the soil-stabilizer system. The effective cohesion intercept of the envelopes increases at a decreasing rate with increasing time. At large strains the mechanical cementation is completely destroyed and a linear relation exists between the shear stress and the effective normal stress which is independent of curing time. The excesspore pressure at the maximum stress difference and at the point of first tangency with effective stress envelope is independent of curing time once the prestress effects due to compaction and the tendency for brittle fracture have been overcome at the higher consolidation pressures. The pore pressures response decreases with increasing curing time and consolidation pressure due to the increased rigidity of the mineral skeleton. The initial tangent modulus increases curing time and consolidation pressure providing premature brittle fracture does not occur.
Massachusetts Institute of TechnologyDepartment of Civil Engineering, 77 Massachusetts Avenue
Cambridge, MA United States 02139
- Wissa, A E
- Ladd, C C
- Publication Date: 1964-7
- Features: Appendices; Figures; References; Tables;
- Pagination: 257 p.
- TRT Terms: Concrete curing; Pore pressure; Shear stress; Strain (Mechanics); Strength of materials; Triaxial shear tests
- Old TRIS Terms: Strains
- Subject Areas: Geotechnology; Highways;
- Accession Number: 00263720
- Record Type: Publication
- Report/Paper Numbers: R64-32 Res. Rept.
- Files: TRIS
- Created Date: Dec 31 1974 12:00AM