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For a concrete mix of very low workability, which of the three IS 1199 methods is best suited?
Answer & Solution
Correct answer: B.
1. Slump cone works for medium workabilities only.
2. Compacting factor extends to a wide range but loses sensitivity at the dry end.
3. Vee-Bee is specifically suited to low and very low workabilities.
4. Kelly ball and flow table are not in the IS 1199 routine set.
5. Hence Vee-Bee is the field test of choice for stiff mixes.
_Source: IGNOU ET-522 Concrete Technology, Block 2 Unit 9 "Testing of Concrete"._
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