Recycled Aggregate Concrete under Cyclic Loading

The objective of this paper was to evaluate the behavior of reinforced concrete beam-column joints that were subjected to cyclic loading in order to investigate and compare ductility and toughness of the joints made either of ordinary or recycled-aggregate concrete. Therefore, a recycled-aggregate concrete was prepared with water/cement of 0.35 and fluid consistency, by completely replacing natural aggregates with recycled aggregates coming from an industrial crushing plant in which rubble from building demolition was suitably treated. A reference concrete was also prepared using natural aggregates with the same fluid consistency but a water/cement of 0.60, sufficient to achieve adequate strength class. A further recycled-aggregate concrete was prepared with a water/cement of 0.40, by adding fly ash to the mixture as a partial replacement for fine aggregate. An acrylic polymer based superplasticiser was used to guarantee the same workability level. Concrete specimens were manufacture for the evaluation of compressive and tensile strength, as well as bond strength between concrete and reinforcing steel bars, to assess the suitability for structural uses. Then cyclic loading of the beam-column joints made of these concretes was carried out. The results gave further experimental evidence of the suitability of recycled-aggregate concrete for structural use, at least for ordinary reinforced concrete structures.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 509-518
  • Monograph Title: Role of Concrete in Sustainable Development

Subject/Index Terms

Filing Info

  • Accession Number: 01010843
  • Record Type: Publication
  • ISBN: 0727732471
  • Files: TRIS
  • Created Date: Nov 28 2005 2:34PM