Correct Answer - Option 4 : 75 mm
Concept-
Aggregates are classified as Fine Aggregates, Coarse Aggregates and Cyclopean Aggregates.
Fine aggregates-
Particles of fine aggregates pass through 4.75 mm mesh and are entirely retained on 0.15mm mesh. Most commonly used fine aggregates are sand, crashed stone, ash or cinder and surkhi. Aggregates that do not pass through 4.75 mm mesh are termed as coarse aggregates.
Coarse aggregates-
It consists of naturally occurring material such as gravel and aggregates whose size is bigger than 4.75 mm but smaller than 75 mm are known as coarse aggregates.
Cyclopean Aggregates-
Size of aggregates is from 7.5 cm (75 mm) to 15 cm. It should satisfy the requirement of IS 515-1959 when it will be used in concrete.
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Aggregates
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Size
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Fine
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Less than 4.75 mm
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Coarse
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4.75-75 mm
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Cyclopean Aggregates-
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75-150 mm
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