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Per §5.2 (Road Research Laboratory, UK), 'workability' of fresh concrete is best defined as:
A{'text': 'The property determining the useful internal work needed for full compaction', 'label': 'A'}
B{'text': 'The total weight of the cement per cubic metre of the mix as batched by mass', 'label': 'B'}
C{'text': 'The 28-day compressive cube strength of the resulting hardened mix on testing', 'label': 'C'}
D{'text': 'The ratio of fine aggregate to coarse aggregate fixed in the design mix proportion', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': 'The property determining the useful internal work needed for full compaction', 'label': 'A'}
1. §5.2 quotes the Road Research Laboratory UK definition: 'the property of concrete which determines the amount of useful internal work necessary to produce full compaction.' An alternate phrasing also given is 'the ease with which concrete can be fully compacted having regard to mode of compaction and place of deposition.'
2. Compressive strength and mix proportions are separate properties.
_Source: IGNOU ET-522 Block-2 Unit-5 Workability & Fresh Concrete-I, §5.2, p. 5-6_
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