Discussion
The maximum allowable water content in Bitumen sample should be:-
Answer: B
The maximum water content in bitumen is 0.2% by weight.
Bitumen should be practically free of water, because water causes foaming when the bitumen is heated and weakens its bond with aggregate. The specifications limit water content to 0.2 percent by weight, tested by the Dean and Stark distillation method.
0.1 percent is stricter than the limit, and 1 and 2 percent would allow enough water to cause foaming in heating.
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