Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

Discussion Forum : Soil Mechanics and Foundation Engineering - Section 2 (Q.No. 46)
46.
Pick up the correct statement from the following:
Illite bond is weaker than Kaolinite bond
Illite bond is stronger than montmorillonite bond
Illites do not swell when wet
Illites are composed of two silica tetrahedralsheets with a central octahedral sheet
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
6 comments Page 1 of 1.

Jibachh mandar said:   8 months ago
Kaolinite = Hydrogen bond.
illite = potassium bond (i.e. stronger than that of H+ bond)
So, b and d are correct.

Gaurav sharma said:   5 years ago
Answer A and B both are correct. Because in illite ionic bond is form which is stronger than water bond (montmorillonite) and weaker than hydrogen bond (Kaolinite).

Example of kaolinite is china clay (teacup) which shows no swelling and shrinkage. We all know water bond of monriolinite shows high shrinkage and swelling. Illite is 500 Armstrong to 1000 Armstrong whereas kaolinite and montmorillonite gives 100 - 1000 Armstrong and 10-50 Armstrong. So both A and B correct.

Dhananjay said:   7 years ago
Yes, Illite does show some swelling.

Sumit said:   8 years ago
Illite swells more than kaolinite.

Bhaskar said:   8 years ago
I think c is the wrong statement.

Pankaj said:   9 years ago
Swelling of Illite is more than that of Kaolinite , but less than montmorillonite.

Properties of Illite are somewhat intermediate b/w Kaolinite and montmorillonite. The lattice is stronger than montmorillonite.

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