Soil Mechanics and Foundation Engineering - Engineering

Q1:

The clay soil mainly consists of

A Kaolinites .

B Montomorillonite

C Illites

D Vermiculite

E All the above.

ANS:E - All the above.

Clay soil contains all of the above minerals, but depending upon the mineral present in the clay, it may swell more or less. For example, if clay contains montmorillonite mineral, clay has more swelling nature. Montmorillonite is the high plasticity and clay is also highly plasticity. So answer B is correct (montmorillonite).