Information About Aggregate, Sand, Silt And Clay

Information About Aggregate, Sand, Silt And Clay

Information About Aggregate, Sand, Silt And Clay

Aggregate is another name of sand, gravel and crushed stone that are used with a binding medium (such as water, bitumen, portland cement, lime, etc.) to form compound materials. Aggregates can either be natural or manufactured.  Natural aggregates are generally extracted by mechanical crushing from larger rock.

 

The Size of Sand, Silt and Clay

Name

Particle Diameter

Clay

below 0.002 millimeters

Silt

0.002 to 0.05 millimeters

Very fine sand
Fine sand
Medium sand
Coarse sand
Very coarse sand

0.05 to 0.10 millimeters
0.10 to 0.25 millimeters
0.25 to 0.5 millimeters
0.5 to 1.0 millimeters
1.0 to 2.0 millimeters

Gravel

2.0 to 75.0 millimeters

Rock

greater than 75.0 millimeters (~2")

 

The terms sandsilt, and clay refer to relative sizes of the soil particles.  Sand, being the larger size of particles, feels gritty.  Silt, being moderate in size, has a smooth or floury texture. Clay, being the smaller size of particles, feels sticky. 

 

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