Per §7.2 ('Effective Water in the Mix'), the water content used to com…

Question

Per §7.2 ('Effective Water in the Mix'), the water content used to compute strength should be taken AFTER:

Accepted Answer

B. {'text': 'All aggregates have reached the surface-saturated-dry (SSD) condition', 'label': 'B'}

1. §7.2 (Effective Water in the Mix): 'Effective water is the water in the mix after aggregates have come to surface saturated dry condition. For calculation of strength effective water content is to be taken into consideration, not mixing water.'
2. Dry aggregates absorb water from the mix; wet ones contribute. SSD is the neutral reference.
_Source: IGNOU ET-522 Block-2 Unit-7 Strength of Concrete, §7.2, p. 46_

Answer

{'text': 'All free water has evaporated from the open mix surface', 'label': 'A'}

Answer

{'text': 'The cement is fully hydrated for at least 7 days of moist curing', 'label': 'C'}

Answer

{'text': 'All entrapped air voids have been fully worked out by vibration', 'label': 'D'}