While performing the slump test for knowing the workability of a concrete mix one uses a tube having the shape of frustum of a cone in order to conduct the test. Why is not a cylindrical tube used instead?
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1 Answer
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Because the cone with frustrum has a longer time constant and also more stability compared to a cylinder.
This gives results measured in seconds and tens of seconds instead of fractions - unless you are testing really failed mixes like 90% water.
