Home › B.Tech Civil › civilengineering › Aggregates › Compared to rounded aggregates, angular aggregat…
Compared to rounded aggregates, angular aggregates typically lead to concrete that has:
A{'text': 'Lower bond strength and durability', 'label': 'A'}
B{'text': 'Lower interlocking but higher strength', 'label': 'B'}
C{'text': 'Higher water requirement only', 'label': 'C'}
D{'text': 'Higher bond strength and durability', 'label': 'D'}
Answer & Solution
Correct answer: D. {'text': 'Higher bond strength and durability', 'label': 'D'}
1. §2.2.4 (ii): 'angular aggregates have greater durability, interlocking nature, higher surface area and higher bond characteristics which results in higher strengths.'
2. The point on flat/flaky aggregates that they 'make very poor concrete' is separate (point iii).
_Source: IGNOU ET-522 Block-1 Unit-2 Aggregates, §2.2.4(ii), p. 20_
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 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-aggre