Direct measurement

B9.1.1 Principle of the test

A vertical pressure is applied to a sample constrained against horizontal deformation. The resulting horizontal and vertical stresses are measured and the coefficient Ks,m0 determined.

NOTE The magnitude of the coefficient Ks m0 is influenced by the direction of the principal stresses in the test sample. The horizontal and vertical stresses are approximately principal stresses in the test sample whereas they may not be in the silo.

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