Home › B.Tech Civil › civilengineering › Aggregates › Per Abrams (cited in §2.2.14), the Fineness Modu…
Per Abrams (cited in §2.2.14), the Fineness Modulus of an aggregate is obtained by:
A{'text': 'Multiplying the cumulative passing percentages and dividing by 50', 'label': 'A'}
B{'text': 'Dividing the maximum size in mm by 100', 'label': 'B'}
C{'text': 'Subtracting the void percentage from 100 percent', 'label': 'C'}
D{'text': 'Adding cumulative retained percentages on standard sieves and dividing by 100', 'label': 'D'}
Answer & Solution
Correct answer: D. {'text': 'Adding cumulative retained percentages on standard sieves and dividing by 100', 'label': 'D'}
1. §2.2.14 (Fineness Modulus): 'Fineness Modulus is obtained by adding the cumulative percentages of aggregates retained on each of the standard sieves ranging from 80 mm to 150 micron and dividing this sum by an arbitrary number 100.'
2. Higher FM indicates a coarser material; sands above FM 3.2 are unsuitable for concrete.
_Source: IGNOU ET-522 Block-1 Unit-2 Aggregates, §2.2.14 (Fineness Modulus), p. 28_
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 §2.3.2(i), in the Aggregate Crushing Value (ACV) test the aggregate sample is loaded uPer §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 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