Practice Shape Tests (7.3.4) - Properties and Testing of Aggregates

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8 questions

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6 sample questions

Question 1.
What does the Flakiness Index measure?
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Think about how thickness is categorized.
Question 2.
What does the Elongation Index evaluate?
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Consider the relationship of length compared to the mean sieve size.
3Question 3.
What is the purpose of the Flakiness Index?
- To measure density
- To measure flaky particles
- To evaluate toughness
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Think about what flakiness refers to.
4Question 4.
True or False: A combined index of 40% is acceptable for bituminous mixes.
- True
- False
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Recall the acceptable limits we discussed.
Question 5.
You have an aggregate sample with a Flakiness Index of 18% and an Elongation Index of 25%. Is the combined index acceptable for use in a pavement mix? Show calculations.
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Add both indices to check against the requirement.
Question 6.
If a construction project requires aggregates with specific indices, how would you adjust a sample with 60% flaky particles to meet the 35% combined index requirement?
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Consider how you would compose a new mix.

4 more questions in this section. Enroll free to practise them all.