Is slump test a good test for measuring workability?
Posted in Concrete Engineering |
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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.
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.
Are there any calculation formulaes or example for the slump test?
“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?