Per §5.3.6, a well-graded aggregate gives BETTER workability mainly be…

Question

Per §5.3.6, a well-graded aggregate gives BETTER workability mainly because:

Accepted Answer

A. {'text': 'It has the least voids in a given volume, freeing paste to lubricate', 'label': 'A'}

1. §5.3.6: 'A well graded aggregate has least voids in a given volume. Other factors remaining the same, when total voids are less, excess paste is available to give better lubricating effect. It also results in cohesive mix, with no segregation and so better compaction with less effort.'
2. Hence good grading actively enhances workability.
_Source: IGNOU ET-522 Block-2 Unit-5 Workability & Fresh Concrete-I, §5.3.6, p. 7_

Answer

{'text': 'It produces a harsher, segregation-prone mix', 'label': 'B'}

Answer

{'text': 'It increases the apparent specific gravity of concrete', 'label': 'C'}

Answer

{'text': 'It accelerates the setting time of cement', 'label': 'D'}