A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 80 kN/m² confining pressure. The vertical deviator stress was increased slowly such that there is no built-up of pore water pressure within the specimen. The specimen failed when the addition axial stress reached 240 kN/m². Find the friction angle of the sand. If another identical sand specimen was subjected to 150 kN/m confining pressure, what would be the deviator stress at failure.

A consolidated-drained triaxial test is carried out on a sand specimen that is subjected to 80 kN/m² confining pressure. The vertical deviator stress was increased slowly such that there is no built-up of pore water pressure within the specimen. The specimen failed when the addition axial stress reached 240 kN/m². Find the friction angle of the sand. If another identical sand specimen was subjected to 150 kN/m confining pressure, what would be the deviator stress at failure.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.18P

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A consolidated-drained triaxial test is carried out on a sandspecimen that is subjected to 100 kN/m2 confining pressure.The vertical deviator stress was increased slowly such thatthere is no build-up of pore water pressure within the specimen.The specimen failed when the additional axial stress reached 260 kN/m2.a. Find the friction angle of the sand.b. Another identical sand specimen is subjected to200 kN/m2 confining pressure. What would be the deviatorstress at failure?
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