What construction issues should be addressed when paving with concrete containing recycled aggregates?
If the procedures described above for production of the RCA and the concrete are followed, construction issues should not be different from issues encountered when paving with concrete manufactured with virgin aggregate. Failure to properly address aggregate processing, water demand, or air entrainment will significantly increase the likelihood of problems in placing and finishing the new pavement. • What are the costs associated with using high-quality RCA? Recycling demonstrates good environmental stewardship, and it may reduce the cost of a paving project, but economic and environmental costs are different on each project. Recycling existing pavement for use as RCA for new concrete pavement may or may not present the best recycling solution. Factors to be considered include availability and cost of virgin aggregate, processing and quality control costs to manufacture high-quality recycled aggregate for use in new concrete, hauling and tipping fees for land-fill disposal of old pavem
