Highway Engineering
The function of an expansion joint in rigid pavements is to

Resist stresses due to expansion
Relieve shrinkage stresses
Relieve warping stresses
Allow free expansion

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Highway Engineering
Select the correct statement.

Minimum and maximum values of group index can be 0 and 20 respectively
All of these
More the value of group index, less thickness of pavement will be required
More the value of CBR, greater thickness of pavement will be required

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