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From page 1...
... 1 Aggregates encompass a wide range of materials including quarried rock, sand, and gravel in addition to recycled/artificial/byproduct materials such as reclaimed asphalt pavement (RAP) and recycled concrete aggregate (RCA)
From page 2...
... 2 aggregate Quality requirements for Pavements classification systems with diverse quality classes associated with each aggregate type and pavement layer application. The findings also indicated that only 44% of the agencies classify aggregates to meet certain quality requirements for pavements.

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