UNDRAINED SHEAR STRENGTH OF CEMENT-TREATED SOILS

ABSTRACT In order to evaluate the effects of cementation on the mechanical properties of cement-treated soil, a series of isotropic consolidation and undrained triaxial compression shear tests were performed for cement-treated specimens of Ariake clay, Akita sand, Rokko Masado and Toyoura sand. This paper evaluates factors affecting the shear strength of these cement-treated soils. The following conclusions are obtained: 1) Cement-treated soil has a normally consolidated line in e-ln p' space which depends on the mixing cement content. The consolidation yield stress, p'y, of cement-treated soil increases with increasing cement content and initial specimen density. 2) Changes in cohesive strength due to cement-treatment can be represented by a tensile effective stress, p'r. Strength properties can then be normalized by the augmented consolidation stress, (p'c+p'r). 3) The shear strength properties of quasi-overconsolidated clay can be represented by the yield stress ratio, R=(p'y+p'r)/(p'c+p'r). 4) The undrained shear strength of cement-treated soils can be represented as a power law relation of the yield stress ratio, R, and the augmented consolidation stress.

[1]  Takashi Tsuchida,et al.  PRACTICES OF REUSED DREDGINGS BY CEMENT TREATMENT , 2001 .

[2]  Kiyonobu Kasama,et al.  ON THE STRESS-STRAIN BEHAVIOUR OF LIGHTLY CEMENTED CLAY BASED ON AN EXTENDED CRITICAL STATE CONCEPT , 2000 .

[3]  Shoji Ogawa,et al.  RELATION BETWEEN FAILURE CRITERION, UNCONFINED COMPRESSIVE STRENGTH AND INITIAL VOID RATIO OF LIGHT-WEIGHT SOIL , 1996 .

[4]  Takeshi Katsumi,et al.  ENGINEERING PROPERTIES OF SOIL STABILIZED BY FERRUM LIME AND USED FOR THE APPLICATION OF ROAD BASE. , 1999 .

[5]  N. Consoli,et al.  Characterization of Cemented Sand in Triaxial Compression , 2001 .

[6]  F. Tatsuoka,et al.  Triaxial strength characteristics of cement-treated soft clay , 1983 .

[7]  Andrew J. Whittle,et al.  Compression model for cohesionless soils , 1995 .

[8]  Fumio Tatsuoka,et al.  ELASTIC DEFORMATION PROPERTIES OF GEOMATERIALS , 1992 .

[9]  Eizo Fukazawa,et al.  EXPERIMENTAL STUDY ON DURABILITY OF ARTIFICIAL SOFT ROCK , 1994 .

[10]  Kazuhiko Nishida,et al.  EXPERIMENTAL STUDIES ON CEMENT STABILIZATION OF SOFT CLAY UTILIZING WASTE ROCK POWDER AS A SUPPLEMENTAL MATERIAL , 1999 .

[11]  H. Fujiwara,et al.  MECHANICAL PROPERTIES OF STABILIZED KAOLIN CLAY BY CEMENT TYPE SOLIDIFIER , 1997 .

[12]  Toshiyuki Mitachi,et al.  CHANGE IN UNDRAINED SHEAR STRENGTH CHARACTERISTICS OF SATURATED REMOLDED CLAY DUE TO SWELLING , 1976 .

[13]  N. Miura,et al.  Stress-strain characteristics of sand in a particle-crushing region , 1984 .

[14]  Kiyoshi Omine,et al.  ESTIMATION OF IN-SITU STRENGTH OF CEMENT-TREATED SOILS BASED ON A TWO-PHASE MIXTURE MODEL , 1998 .

[15]  Suksun Horpibulsuk,et al.  ENGINEERING BEHAVIOR OF CEMENT STABILIZED CLAY AT HIGH WATER CONTENT , 2001 .

[16]  Ken Been,et al.  A STATE PARAMETER FOR SANDS , 1985 .

[17]  Charles C. Ladd,et al.  New design procedure for stability of soft clays , 1974 .

[18]  N. S. Rad,et al.  CEMENTED SANDS UNDER STATIC LOADING , 1981 .

[19]  T. Lambe.  A mechanistic picture of the shear strength of clay , 1960 .

[20]  Takao Ito,et al.  EVALUATION OF RESISTANCE TO LIQUEFACTION CAUSED BY EARTHQUAKES IN SANDY SOIL STABILIZED WITH QUICK LIME CONSOLIDATED BRIQUETTE PILES , 1994 .