Consider the following statements regarding pavements:

By Ritesh|Updated : November 2nd, 2022
  1. Rigid pavements are more suitable than flexible pavements for stage construction.
  2. Rigid pavements are more affected by temperature variations than flexible pavements.
  3. In a flexible pavement, any deformation in the top layers is transferred to under-laid layers but, in rigid pavements, there is slab or beam action due to which any deformation is only in the top layer of the concrete slab.

Which of the above statements is correct?

  1. 1 and 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

The statements Rigid pavements are more affected by temperature variations than flexible pavements and In a flexible pavement, any deformation in the top layers is transferred to under-laid layers but, in rigid pavements, there is slab or beam action due to which any deformation is only in the top layer of the concrete slab are correct.

Rigid and Flexible Pavement

Following are some examples of how rigid and flexible pavement differ:

Flexible pavement

Rigid pavement

Grain-to-grain contact moves the burden from the top to the bottom.

Slab action is used to transmit the weight.

minimal or insignificant flexural strength

strong flexural capacity.

There are no joints.

There are contraction and expansion joints available.

Low upfront costs, but substantial ongoing expenses.

Low maintenance costs yet a high initial cost.

It consists of layers for the base, surface, sub-base, and subgrade.

Base course, Concrete slab, and subgrade layers are all part of it.

Underlying layers receive the effects of deformation in the top layers.

Only the top layer of the concrete slab has been deformed.

more appropriate for building stages

Less suited for stage building.

Extremely minimal impact of temperature stress

affected by frictional forces and temperature

Summary:

Consider the following statements regarding pavements

The assertions Temperature changes have a greater impact on rigid pavements than on flexible pavements, and Any deformation in the top layers of a flexible pavement is communicated to the layers underneath it, whereas with rigid pavements, any deformation only affects the top layer of the concrete slab because of slab or beam action.

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