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Per §2.3.1(v) of the source, the specific gravity of an aggregate sample is computed by:
A{'text': 'A / (B - C), with A = oven dry, B = saturated surface dry in air, C = saturated in water', 'label': 'A'}
B{'text': 'C / (B - A), with A = saturated in water, B = saturated surface dry in air, C = oven dry in air', 'label': 'B'}
C{'text': 'B / (A + C)', 'label': 'C'}
D{'text': '(A * B) / C', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'C / (B - A), with A = saturated in water, B = saturated surface dry in air, C = oven dry in air', 'label': 'B'}
1. §2.3.1(v) gives: Specific gravity = C/(B - A), where A = weight in gm of saturated aggregate in water, B = weight in gm of saturated surface-dry aggregate in air, C = weight in gm of oven-dried aggregate in air.
2. The denominator (B - A) is the buoyancy effect; the numerator C is the dry mass.
_Source: IGNOU ET-522 Block-1 Unit-2 Aggregates, §2.3.1(v), p. 36_
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