TIME EFFECTS ON TOTAL SUCTION OF BENTONITES

SOILS AND FOUNDATIONS

MUHAMMAD IBRAR KHAN²  YULIAN FIRMANA ARIFIN³  TOM SCHANZ⁴  SETIANTO SAMINGAN AGUS¹ 

[1] Engineering Consultancy Firm;Laboratory of Foundation Engineering, Soil- and Rock Mechanics, Ruhr-Universität Bochum;Laboratory of Soil Mechanics, Bauhaus-University Weimar;Laboratory of Foundation Engineering, Soil- and Rock Mechanics, Ruhr-Universität Bochum.

关键词: bentonite;    chilled-mirror hygrometer;    time effect;    total suction;    (IGC: B10/D1/D2/D3/D4);   

DOI  :  10.3208/sandf.50.195

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(25)Cited-By(2)This paper presents a study on time effects on total suction of bentonite-based materials under constant water content conditions. Three different types of bentonite (i.e., MX80, Calcigel I, and Calcigel II) and a natural expansive clay (i.e., London Clay) were used. Total suction was measured using chilled-mirror hygrometer technique. The measurements were performed on specimens aged 1 hour, 6 hours, 1 day, 2 days, 1 week, 2 weeks, 1 month, and 2 months. The results show that the true equilibrium state for two types of bentonite (i.e., MX80 and Calcigel I) used is time dependent. Total suction increases with time and this behaviour is controlled by the characteristics of the bentonites. Total suction of the other specimens (i.e., Calcigel II and London Clay) is not affected by curing time. The changes in total suction with time as the specimen's age are attributed to non homogeneity of the water content distribution in the micro- and macropores of the bentonites and inaccuracy of the device used.

【 授权许可】

Unknown