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What are the different functions of aggregates, filler and binder in bituminous pavement?

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In bituminous materials, course aggregates perform the bulking action of the mixture and contributes to the stability of resulting mix. Fine aggregates form the major proportion of mortar.

Filler: it stiffens and strengthens the binder.
Binder: cements the whole mixture together and provides waterproofing.

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This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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