Building Construction
Auger boring

Is generally employed in cohesive and other self soils above water table
All of these
Is the most primitive method for making a hole in the ground
Is most economical up-to a depth of 5 meters

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Building Construction
Gravels

Vary in size between 2 to 20 mm
Never swell when they come into contact with water
All listed here
Are cohesionless aggregates

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