Mechanical and Environmental Proprieties of UHP-FRCC Panels Bonded to Existing Concrete Beams

Tomoya Nishiwaki, Oscar Mancinelli, Alessandro Pasquale Fantilli and Yuka Adachi
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Tomoya Nishiwaki: Department of Architecture and Building Science, School of Engineering, Tohoku University, Sendai 980-8579, Japan
Oscar Mancinelli: Department of Structural, Building and Geotechnical Engineering (DISEG), Politecnico di Torino, 10129 Torino, Italy
Alessandro Pasquale Fantilli: Department of Structural, Building and Geotechnical Engineering (DISEG), Politecnico di Torino, 10129 Torino, Italy
Yuka Adachi: Department of Architecture and Building Science, School of Engineering, Tohoku University, Sendai 980-8579, Japan

Sustainability, 2021, vol. 13, issue 6, 1-15

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.

Keywords: existing beams; retrofitting method; environmental assessment; fly ash; moment–curvature relationship; precast elements (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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