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FACT #45

Sustainability

Crushed concrete is rarely used as aggregate in asphalt pavement.

Reclaimed asphalt can be recycled/reused as new asphalt. Reclaimed concrete can be recycled into road base material but,  because  it is highly absorptive, it is not desirable as aggregate for asphalt pavements. When being reused in asphalt pavement, the asphalt cement in reclaimed asphalt is reactivated so that it becomes part of the "glue" of the new pavement. But putting reclaimed concrete into a new asphalt pavement would be counter-productive. The reclaimed concrete is highly absorptive, so it would soak up the new asphalt cement instead of just being coated by it. This would be a waste of precious natural resources.