Civil Engineering - Building Materials - Discussion

25. 

Bulking of sand is caused due to

[A]. surface moisture
[B]. air voids
[C]. viscosity
[D]. clay contents
[E]. all the above.

Answer: Option A

Explanation:

No answer description available for this question.

Santosh Burale said: (Dec 20, 2016)  
Increase in volume due to surface moisture.

Dipen Tilva said: (Jan 11, 2017)  
These films of moisture exert a force, known as surface tension, on each particle. Due to this surface tension, each particle gets away from each other. Because of this no direct contact is possible among individual particles and this causes bulking of the volume.

So, A is the correct answer.

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