Home › B.Tech Civil › civilengineering › Aggregates › Per §2.3.2(i), in the Aggregate Crushing Value (…
Per §2.3.2(i), in the Aggregate Crushing Value (ACV) test the aggregate sample is loaded uniformly to a total load of:
A{'text': 'About 20 tonnes in 5 minutes', 'label': 'A'}
B{'text': 'About 60 tonnes in 15 minutes', 'label': 'B'}
C{'text': 'About 40 tonnes in 10 minutes', 'label': 'C'}
D{'text': 'About 100 tonnes in 30 minutes', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'About 40 tonnes in 10 minutes', 'label': 'C'}
1. §2.3.2(i): the aggregate sample (≈6.5 kg, passing 12.5 mm and retained on 10 mm) 'is placed in the test apparatus and is loaded uniformly upto a total of 40 tonnes in 10 minutes.'
2. The crushed material is then sieved through a 2.36 mm IS sieve and ACV = (B/A) × 100, where A is the original mass and B is the mass passing the 2.36 mm sieve.
_Source: IGNOU ET-522 Block-1 Unit-2 Aggregates, §2.3.2(i), p. 37_
Related questions
Per the source, three thermal properties of aggregates are named; the one most important fIn the Mortar Bar Expansion Test (Stanton) cited in §2.2.12, the aggregate is considered HPer §2.3.2(iii), in the Aggregate Impact Value test the standard hammer falls from a heighPer §2.3.1(v) of the source, the specific gravity of an aggregate sample is computed by:Per §2.2.14, the Fineness Modulus range that corresponds to MEDIUM sand is:Per Abrams (cited in §2.2.14), the Fineness Modulus of an aggregate is obtained by:Per the prevention measures in §2.2.12, the alkali content of cement to limit alkali-aggrePer §2.2.12, the chief reactive component in aggregates that drives the alkali-aggregate r