PREPARATION OF WATER-SATURATED BENTONITE SAMPLES AND THEIR USE IN TORSION SHEAR TESTS

SOILS AND FOUNDATIONS

TARO UCHIMURA¹  MISAKO NAKAMURA²  BACH THUAN THAI²  IKUO TOWHATA¹  KENICHI KAWANO²  KEIICHI SUGO¹ 

[1] Department of Civil Engineering, University of Tokyo;University of Tokyo

关键词: bentonite;    consolidation;    damping;    laboratory test;    repeated load;    test equipment;    (IGC: D6/D7);   

DOI  :  10.3208/sandf.49.981

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(15)The present study concerns cyclic shear tests on water-saturated bentonite samples. Since the tested bentonite is of sodium type, it absorbs water remarkably, and hence it is difficult and time-consuming to consolidate it for shear tests. This difficulty was overcome by inventing a new consolidation tank in which the drainage path is significantly shortened, and consequently the consolidation time is shortened. Cyclic torsion shear tests were performed on thus-prepared specimens to examine the variation of shear modulus and damping ratio with increasing shear strain amplitude. Moreover, cyclic shear stress was applied on an anisotropically consolidated specimen to demonstrate that permanent distortion of bentonite is small even during a very strong earthquake loading.

【 授权许可】

Unknown