Explain the roles of base course and sub base courses in pavements.

1.	Explain the roles of base course and sub base courses in pavements.
Answer» PAVEMENTS are FLEXIBLE pavements. Flexible pavements are so named because the total PAVEMENT structure deflects, or flexes, under loading. A flexible pavement structure is typically composed of several layers of material each of which receives the loads from the above layer, spreads them out, then passes them on to the layer below. Thus, the further down in the pavement structure a particular layer is, the less LOAD (in terms of force per area) it MUST carry .

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Explain the roles of base course and sub base courses in pavements.

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