Question

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Distinguish b/w flexible & rigid pavements. What are the causes of failures of flexible & rigid pavements?
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Answer 1

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The structure of of flexible pavement consists of a series of layers with the highest quality materials at or near the surface of the pavement. Whereas the structure of rigid pavement consists of a layer of Portland cement concrete slab or relatively high flexural strength......

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Answer 2

Answer:

Design of rigid pavement is based-scientific design stresses of concrete on whereas flexible pavement design is mostly empirical in nature.

• Life of rigid pavement is more than the flexible one.

• Maintenance of well deigned rigid pavement is practically very small, whereas the bituminous surface of flexible pavement needs frequent maintenance.

• The initial cost of rigid pavement is much more than the flexible one. Considering the stage of construction, flexible pavement is preferred to the rigid pavement. The selection of a type of pavement depends on the availability of materials of construction.

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