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Building Materials

Q1:

Bulking of sand is caused due to

A surface moisture

B air voids

C viscosity

D clay contents

E all the above.

ANS:A - surface moisture

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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