12 Questions
What are soils formed from?
Physical and chemical weathering of rocks
Which type of soil contains calcium carbonate and effervesces when treated with hydrochloric acid?
Calcareous soil
What are Aeolian soils?
Soils transported by wind
What are the main components of minerals of interest to geotechnical engineers?
Oxygen and silicon
Which group do kaolinite, illite, and montmorillonite belong to?
Clay minerals
Where are alluvial soils deposited?
Along streams by running water
What holds the layers together in Montmorillonite?
Van der Waals forces
What are the spaces between mineral particles in soil called?
Voids
Which process is used to determine particle sizes for gravels and sands?
Sieving
Why is hydrometer analysis used for determining particle sizes of fine-grained soils (silts and clays)?
Their extremely small size makes sieving impractical
According to the USCS and ASTM specifications, what is the particle size range for sand?
< 4.75 mm and ≥ 0.075 mm
What is a potential issue with hydrometer analysis for clay particles?
Collision of plate-like clay particles during sedimentation
Learn about how soils are formed through the weathering of rocks and the different types of soils like marine, calcareous, and aeolian soils.
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