Identify whether the following statements related to highway pavements are true or false.
1. Rigid pavements are subjected to warping and frictional stresses.
2. Flexible pavements are subjected to the maximum intensity of stresses that occur at the
bottom layer.
Statement 1 – True
Rigid (concrete) pavements experience:
Warping stresses due to temperature gradient between the top and bottom of the slab, and
Frictional stresses due to the restraint offered by the subgrade/base against expansion or contraction of the slab caused by overall temperature changes.
Statement 2 False
In flexible pavements, wheel-load stresses are highest at the surface and decrease with depth. The top layers experience the maximum intensity of stresses; the bottom layers experience the least. (This is why higher-quality materials are used in the upper layers.)
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