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Experiment No. 1: Gradation Analysis of Fine Aggregate

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Experiment No. 1: Gradation Analysis of Fine Aggregate

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Questions and Answers

What is the purpose of using the cumulative method when weighing the material retained on each sieve?

To save time by weighing all the sieves together.

To prevent the need for recording individual sieve weights.

To avoid using a balance for each individual sieve.

To determine the total mass of fine aggregates retained on all sieves. (correct)

What precaution should be taken when recording the mass of fine aggregates retained on the sieve?

Use the cumulative percentage to determine the mass.

Deduct the dry weight of used materials before recording the mass. (correct)

Add the dry weight of used materials after recording the mass.

Combine the mass of fine aggregates with the dry weight of used materials.

How is the fineness modulus of fine aggregate calculated?

By multiplying the total cumulative percentage for retain aggregate.

By adding the total cumulative percentage for retain aggregate.

By subtracting the total cumulative percentage for retain aggregate.

By dividing the total cumulative percentage for retain aggregate. (correct)

What is the significance of determining whether a tested fine aggregate is poorly graded through grading curve analysis?

To assess its suitability as a concrete material. Signup and view all the answers

Why is it important to refer to a standard when assessing the suitability of fine aggregate for concrete material?

To ensure consistent testing methods. Signup and view all the answers

In table 2, what does a cumulative percentage of 78% for a specific sieve indicate?

22% of fine aggregates have passed through that sieve. Signup and view all the answers

What does the sieve analysis determine?

The compliance with design requirements Signup and view all the answers

Why is it recommended to use the sieve analysis in conjunction with AASHTO T 11?

To determine the compliance with material passing the No. 200 (75 µm) sieve Signup and view all the answers

What is NOT determined through a sieve analysis?

Specific gravity of the aggregate particles Signup and view all the answers

How is the size of screen openings arranged in a set of nested sieves?

Decreasing from top to bottom Signup and view all the answers

What is one of the uses of gradation data obtained from a sieve analysis?

Predicting trends during production Signup and view all the answers

Why is accurate determination of material passing the No. 200 (75 µm) sieve not possible with the sieve test alone?

Because it needs to be used in conjunction with AASHTO T 11 Signup and view all the answers