PROPERTIES OF CEMENT-TREATED SOILS DURING INITIAL CURING STAGES

SOILS AND FOUNDATIONS

HIROYUKI TANAKA¹  SOCHAN SENG¹ 

[1] Hokkaido University

关键词: bender element;    cement-treated soil;    fall cone;    hardening process;    shear modulus;    shear strength;    vane shear;    (IGC: D6/D10);   

DOI  :  10.3208/sandf.51.775

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(22)Cited-By(7)The engineering properties of cement-treated soils manufactured by the so-called “Pipe Mixing Method” and “Super GeoMaterial (SGM) Method” were studied. In these methods, clayey soils with high water contents are mixed with cement and used as fill material. Since the cement-mixed soils are transported through a pipeline, whose length at times exceeds 2 km, the properties of the treated soil during the initial stages of the hardening process are important. Bender element, vane shear and fall cone tests were performed to obtain such engineering properties as the shear modulus and the shear strength. The study revealed the following: 1) The minimum shear wave velocity of treated soils is detectable at around 2.8 m/s, corresponding to a shear modulus of about 12 kPa. 2) A linear correlation between the shear modulus and the shear strength exists even in the very early stages of curing, approximately G=300 s, where G and s are the shear modulus and the shear strength, respectively. This relation is similar to that for natural clays. 3) The “setting time” observed for concrete is also apparent in cement-treated soil materials. 4) Fall cone tests comprise a useful and simple technique for measuring very low levels of shear strength.

【 授权许可】

Unknown