Discussion of “Re-examination of Undrained Strength at Atterberg Limits Water Contents” By H. B. Nagaraj, A. Sridharan, and H. M. Mallikarjuna
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A thorough reading of the paper under discussion has been done. On the writers observations from literature that the undrained shear strengths observed at liquid limit by both the percussion and cone methods vary widely the discusser wishes to state the following points:
Conventionally, liquid limit has been defined as the water content at which a clay is practically liquid but possesses a certain small (presumably the smallest) shearing strength that is possible to measure by a standardized procedure (Taylor 1948): thus originated the strength-based tests. It bears repetition in literature that as soils do not pass abruptly from one state into another, therefore, drawing up of a limit in such a transition phase must, of necessity, involve an element of arbitrariness.
Mitchell (2005) has reported about approximately equal undrained shear strength of about 1.7–2.0 kPa at liquid limit water content and has mainly attributed this to the same average adsorbed water layer thickness on all...
KeywordsCone Angle Liquid Limit Plastic Limit Undrained Shear Strength Unconfined Compression
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