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What are the grading requirements for the sub base and base layers of the flexible pavement...

What are the grading requirements for the sub base and base layers of the flexible pavement structure

Engineering   Civil-Engineering   
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Particle size distribution of aggregate is termed as Gradation. Gradation range vary for sub base and base layer of flexible pavement. Gradation depend upon type and conditions to which the granular layer is subjected. Frost susceptibility and permeability of pavement depends on the gradation. Base stability also depends on gradation of aggregate used. The maximum size of 50mm or less is used for granular base and is dense graded. Granular sub base can have a nominal maximum size of 100mm.

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