Civil Engineering - Soil Mechanics and Foundation Engineering - Discussion

1. 

Pick up the cohesive soil from the following:

[A]. Red earth
[B]. Clay
[C]. Black cotton soil
[D]. Compacted ground.

Answer: Option C

Explanation:

No answer description available for this question.

Bharathi.R said: (Nov 17, 2014)  
How it is possible black cotton is cohesive soil? The correct answers is clay.

Imtiyaz said: (Sep 9, 2015)  
Correct answer is C please confirm right ya wrong.

Vamsi said: (Dec 5, 2015)  
Black cotton soil contain high montmorillonite which has high swell and shinkage character give options black cotton is purely cohesive soil.

Uday said: (Aug 13, 2016)  
Generally, the clay is cohesive but hear black cotton soil also cohesive greater than clay.

Keshav said: (Sep 11, 2016)  
Cohesive soil because its liquid limit is more than clay.

Liquid limit of clay - 40% to 150% but LL of black cotton soil is about 400 to 800%.

Snehal Wankhede said: (Sep 26, 2016)  
Black cotton soil is cohesive soil, but clay also cohesive soil. So both are correct.

Aksh said: (Feb 25, 2017)  
Clay is the right answer.

Jhant Dev said: (Mar 12, 2017)  
Yes, clay is the right answer.

Chaudhary said: (May 30, 2017)  
Black cotton soil is also clay.

Clay is a form of 3 minerals illite kaolinite and montmorillonite in black cotton mont is max.

So, the black cotton soil is also a clay soil.

Swap said: (Aug 31, 2017)  
Clay is also the right option.

Tsehay said: (Sep 14, 2017)  
Both clay and black cotton soil are cohesive but the cohesiveness of black soil is higher than clay soil b/c the internal interlocking of soil particles in black cotton soil is weaker than that of clay.

Himanshu Negi said: (Dec 14, 2017)  
Here, it is asked for most cohesive soil.

Pawar said: (Jan 7, 2018)  
What is cohesive soil?

Viru Kapoor said: (Mar 22, 2018)  
The black cotton soil is the correct answer.

It is a type of clay with most swells properties.

Shama said: (Oct 24, 2018)  
Guys all clays are not cohesive. There are soils having particle size less than 2 micro metre but having no cohesion. Whereas black cotton soil has cohesive properties.

Simran said: (Feb 20, 2019)  
Clay is the cohesive soil. Black cotton soil is residual soil.

Jayes said: (Apr 16, 2019)  
@Simran.

Black cotton soil is expansive soil.

Seenu said: (Jun 1, 2019)  
First of all, clay is not a cohesive soil it's only a c-phi soil. The best example of cohesive soil is undrained clay.

Augustine said: (Oct 19, 2020)  
@Keshav.

Thank you for your explanation.

Faisalabadi said: (Jul 2, 2021)  
Clay and black cotton soil both are cohesivebut black cotton soil is more cohesive then clay.

Ajay Kumar Yadav said: (Sep 11, 2021)  
Black cotton soil is more cohesive than clay. So options black cotton soil is correct.

Ajay Kumar Yadav said: (Sep 11, 2021)  
Black cotton soil is more cohesive than clay. So options black cotton soil is correct.

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