In our previous post we have discussed about activity of soil. Now we will learn about significance of this term in foundation engineering. In United States, large parts of Africa and India there have severe problems associated with expansive potential of clay soil. The three clay minerals we concern mainly in foundation engineering are:
If we can identify the mineral structure of clay soils, we can predict their expansion and shrinkage potential.
Many lighter building in the regions of expansive soil, subjected to severe settlement in the regions stated above of the world; even before they were left for operation.
Dear reader we have discussed about montmorillonite in our previous posts. In our upcoming post we will discuss about clay mineralogy; there we will discuss about elaborate mechanism and activity of montmorillonite. Montmorillonite is the main mineral element of black cotton soil. We have discussed about molecular sandwich of black cotton soil in our previous post.
The mineral structure of clay is indicative to amount of water and form of their presence in clay minerals. Water can combine separated mineral units to form a sheets stakes over another unit.
Dear reader we will finish this topic in next part where we will discuss about soil classification depending on activity and information that can achieved from activity of clay soil.