Question

Consider the following statements:
1. A high aggregate impact value indicates strong aggregates.
2. A low aggregate crushing value indicates high crushing strength of aggregates.
3. Aggregates having elongation index values greater than $15$ are generally considered suitable for pavement construction.
4. Flakiness index of aggregates should not be less than $25$ for use in road construction.
Which of the above statements is/are correct?

• A. 2 and 3 only
• B. 2 and 4 only
• C. 1 and 3 only
• D. 1 and 4 only

Answer 1

The correct option is A 2 and 3 only

Elongation index values greater than $15$ are generally considered suitable for pavement construction. Elongation index should not be greater than $45$.
The flakiness index value of aggregate should be below $35$ that recommended for road construction.
A high aggregate impact value indicates high crushing strength of an aggregate.
A low aggregate crushing value indicates high crushing strength of an aggregate.
$[\text{Aggregate crushing value(ACV)}\propto \frac{1}{\text{Strength}}]$