Recycling concrete aggregatesin precast concrete production

Cost-effective and sustainable precast technology

This work aimed at evaluating the influence of the use of recycled-concrete aggregates on the mechanical performance of precast concrete. Recycled concrete was obtained as scraps of the precasting process itself and characterized by physical properties quite close to those of ordinary aggregates due to the high strength class of the original concrete, which was in the range 50- 55 MPa. Several substitution percentages were tried between 5% and 30% by weight of the total amount of aggregate used for preparing concrete in order to establish the maximum replacement percentage which could allow maintaining the same concrete strength class.

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