Mechanical and environmental proprieties of uhp-frcc panels bonded to existing concrete beams

Tomoya Nishiwaki, Oscar Mancinelli, Alessandro Pasquale Fantilli, Yuka Adachi

Research output: Contribution to journalArticlepeer-review

Abstract

Among the techniques used to retrofit existing reinforced concrete structures, methods involving Ultra High Performance Fiber Reinforced Cementitious Composites (UHP-FRCC) are widely regarded. However, current practices make the use of this material for in-situ application expensive and complicated to perform. Accordingly, a new method to strengthen existing concrete beams by applying a precast UHP-FRCC layer on the bottom side are introduced and described herein. Two test campaigns are performed with the aim of defining the best conditions at the interface between the reinforcing layer and the existing beam and to reducing the environmental impact of UHP-FRCC mixtures. As a result, the eco-mechanical analysis reveals that the best performances are attained when the adhesion at interface is enhanced by means of steel nails on the upper surface of the UHP-FRCC layer, in which 20% of the cement is replaced by fly ash.

Original languageEnglish
Article number3085
JournalSustainability (Switzerland)
Volume13
Issue number6
DOIs
Publication statusPublished - 2021 Mar 2

Keywords

  • Environmental assessment
  • Existing beams
  • Fly ash
  • Moment–curvature relationship
  • Precast elements
  • Retrofitting method

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Management, Monitoring, Policy and Law

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