TY - JOUR
T1 - Mechanical and environmental proprieties of uhp-frcc panels bonded to existing concrete beams
AU - Nishiwaki, Tomoya
AU - Mancinelli, Oscar
AU - Fantilli, Alessandro Pasquale
AU - Adachi, Yuka
N1 - Funding Information:
The authors would like to thank the Italian Civil Protection for the administrative and technical support given within the Research Program DPC Reluis?Politecnico di Torino (2019-2021)?WP11: Code rules contributions in the field of existing reinforced concrete structures.
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/3/2
Y1 - 2021/3/2
N2 - 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.
AB - 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.
KW - Environmental assessment
KW - Existing beams
KW - Fly ash
KW - Moment–curvature relationship
KW - Precast elements
KW - Retrofitting method
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U2 - 10.3390/su13063085
DO - 10.3390/su13063085
M3 - Article
AN - SCOPUS:85103110700
VL - 13
JO - Sustainability (Switzerland)
JF - Sustainability (Switzerland)
SN - 2071-1050
IS - 6
M1 - 3085
ER -
