Page 12 - Unit 2: Pavement Material

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Aggregate Aggregates

• “Aggregate” is a collective term for sand, gravel and crushed stone mineral materials in
their natural or processed state (NSSGA, 1991).

• In hot mix asphalt (HMA), aggregates are combined with a asphalt binding medium to
form a compound material.
• The raw material which is used as road aggregate can be further classified as:
a. Naturally occurring aggregate :

i. Igneus

ii. Sedimentary
iii. Metamorphic

b. Artificial Aggregate Figure : Naturally occurring aggregate sources
i. Blast Furnace Slag

ii. Burnt Shale

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Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my