Influence of reconsolidation stress history and strain rate on the behaviour of kaolin over a wide range of strain
Identifieur interne : 002042 ( Main/Exploration ); précédent : 002041; suivant : 002043Influence of reconsolidation stress history and strain rate on the behaviour of kaolin over a wide range of strain
Auteurs : J. N. Mukabi [Kenya] ; F. Tatsuoka [Japon]Source :
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Abstract
In conventional laboratory testing, the reconsolidation procedures and shearing strain rate are known to influence the characteristics of clays and in particular their subsequent stress - strain behaviour. In this study the influence of reconsolidating Stress Ratio along five different stress paths (Kc = 1.0, 0.8, 0.7, 0.64 or 0.6), OCR and strain rate was evaluated over a wide range of strain from εa < 0.001% to post peak values of εa > 25% and the importance of so doing is reported. This study also shows that most existing theories characterizing the deformation and strength behaviour of clays which assume the failure for a normally consolidated clay occurs at the Critical State Line (CSL) irrespective of drain condition, strain rate and stress path traversed towards the CSL, are inadequate and may need modification
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