In sieve analysis, the portion of soil sample retained on sieve (+4.75 mm size) is termed as the ____.

Concept:

In sieve analysis, soil samples are passed through a series of sieves with different mesh sizes to determine the particle size distribution. The portion of the soil sample that is retained on each sieve is used to classify the soil.

Sieve fraction: This term is not specifically used to describe the portion of soil retained on a specific sieve.

Sedimentation fraction: This term relates to particles that settle out of suspension in a liquid and is not used in the context of sieve analysis.

Aperture fraction: This term refers to the openings in the sieve mesh and is not used to describe the portion of soil retained.

Gravel fraction: This term is used to describe the portion of the soil sample retained on a 4.75 mm sieve, indicating larger particles such as gravel.

Conclusion:

The portion of soil sample retained on a sieve (+4.75 mm size) is termed as the Gravel fraction.