Influence of the Crushing Process of Recycled Aggregates on Concrete Properties

Abstract:

This work intends to evaluate the (mechanical and durability) performance of concrete made with coarse recycled concrete aggregates (CRCA) obtained using two crushing processes: primary crushing (PC) and primary plus secondary crushing (PSC). This analysis intends to select the most efficient production process of recycled aggregates (RA). The RA used here resulted from precast products (P), with strength classes of 20 MPa, 45 MPa and 65 MPa, and from laboratory-made concrete (L) with the same compressive strengths. The evaluation of concrete was made with the following tests: compressive strength; splitting tensile strength; modulus of elasticity; carbonation resistance; chloride penetration resistance; capillary water absorption; and water absorption by immersion. These findings contribute to a solid and innovative basis that allows the precasting industry to use without restrictions the waste it generates.

• Periodical: Key Engineering Materials (Volume 634)
• Pages: 151-162
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.634.151
• Online since: December 2014
• Authors: Diogo Pedro, Jorge de Brito, Luís Evangelista
• Keywords: Crushing Process, Performance, Precasting, Recycled Aggregates

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