Practice Flakiness And Elongation Index Test (5.4.6) - Aggregates – Properties, Grading, Testing

Practice: Flakiness and Elongation Index Test

Lesson 5.4.6Aggregates – Properties, Grading, Testing

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9 questions

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6 sample questions

Question 1.
What are flaky aggregates?
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Think about the relationship between thickness and the average size.
Question 2.
How do you determine if an aggregate is elongated?
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Remember the ratio we discussed.
3Question 3.
What indicates that an aggregate is classified as flaky?
- Thickness < 0.6 × mean size
- Length > 1.8 × mean size
- Thickness > mean size
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Think about how thickness relates to the standard of 0.6.
4Question 4.
True or False: Elongated aggregates are desirable in concrete mix.
- True
- False
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Recall what elongation means in the context of shape.
Question 5.
Given a sample aggregate with 30% flaky particles and 50% elongated particles, discuss the potential impacts on a concrete mix's performance.
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Visualize how these shapes interlock when mixed.
Question 6.
Design an experiment to compare the performance of concrete made with standard aggregates versus those with high flakiness and elongation indices.
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Think about variables you might need to control in your mixes.

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