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Is slump test a good test for measuring workability?

Though slump test is originally designed as a measure of workability, it turns out to be an indicator of excessive water content in concrete only.

Slump test is not considered as a measure of workability because:

(i) There is no connection between the test results of slump test and workability;

(ii) The test results exhibit large random variations which is greater than that due to observed differences in workability;

(iii) Concrete of different workability may have the same slump.


This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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6 comments on "Is slump test a good test for measuring workability?"

Aditi says:

Workability is the ease with which concrete can be worked with, And slump test shows retention of concrete. So doesn’t that mean slump test can show the retention of concrte implying for how long concrete can be worked with?? Please explain.

ABBE says:

Are there any calculation formulaes or example for the slump test?

Eng. Adam says:

“Sometimes the same slump value of concrete could have the different workability” so what cause(s) of this phenomenon?
Slump value affected by concrete different grades?

vikash kumar mishra says:

what is the weight of slump cone apparetus

Raja says:

can you pls tell me the consistency limits ranges for very low,low,medium consistency?

ambrishparit says:

which is the best method of measuring workability and why

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