TY - GEN

T1 - Glass transition evaluation of commercially available epoxy adhesives for strengthening of steel structures with bonded CFRP plates

AU - Hosseini, A.

AU - Barbezat, M.

AU - Michels, J.

AU - Ghafoori, E.

AU - Motavalli, M.

AU - Terrasi, G.

N1 - Funding Information: The authors gratefully acknowledge the financial support provided by the Swiss National Science Foundation (SNSF Project No. 200021-153609). The authors also would like to thank the technicians of the Structural Engineering Research Laboratory as well as the Mechanical Systems Engineering Laboratory of Empa for their exceptional cooperation in performing the experiments. Publisher Copyright: © INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering. All rights reserved.

PY - 2018

Y1 - 2018

N2 - In the current study, the glass transition and tensile behavior of three different cold-curing two-component epoxies, commercially available as structural adhesives for carbon fiber reinforced polymer (CFRP) strengthening of concrete and steel structures, has been investigated. A set of dynamic mechanical thermal analysis (DMTA) tests have been performed, through which the glass transition behavior of two high toughness epoxies, suitable for steel strengthening, was compared to a typical high stiffness adhesive for concrete applications. In addition to DMTA tests, a set of tensile tests was also performed on dogbone specimens to evaluate and compare the tensile mechanical behavior of the selected epoxy adhesives. Furthermore, the influence of two different curing scenarios (i.e., room temperature curing (RTC), and accelerated curing (AC) by heating) on the glass transition temperature as well as tensile mechanical properties of all the three epoxy adhesives was investigated. Based on the experimental results of the current study, certain recommendations are proposed to select a proper epoxy adhesive for strengthening of steel structures with bonded CFRP composites.

AB - In the current study, the glass transition and tensile behavior of three different cold-curing two-component epoxies, commercially available as structural adhesives for carbon fiber reinforced polymer (CFRP) strengthening of concrete and steel structures, has been investigated. A set of dynamic mechanical thermal analysis (DMTA) tests have been performed, through which the glass transition behavior of two high toughness epoxies, suitable for steel strengthening, was compared to a typical high stiffness adhesive for concrete applications. In addition to DMTA tests, a set of tensile tests was also performed on dogbone specimens to evaluate and compare the tensile mechanical behavior of the selected epoxy adhesives. Furthermore, the influence of two different curing scenarios (i.e., room temperature curing (RTC), and accelerated curing (AC) by heating) on the glass transition temperature as well as tensile mechanical properties of all the three epoxy adhesives was investigated. Based on the experimental results of the current study, certain recommendations are proposed to select a proper epoxy adhesive for strengthening of steel structures with bonded CFRP composites.

KW - Accelerated curing (AC) by heating

KW - Characterization of epoxy adhesives

KW - Dynamic mechanical thermal analysis (DMTA)

KW - Room temperature curing (RTC)

KW - Strengthening of steel structures

KW - Tensile mechanical properties

UR - http://www.scopus.com/inward/record.url?scp=85077527834&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85077527834

T3 - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018

SP - 267

EP - 274

BT - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018

A2 - Ferrier, Emmanuel

A2 - Benzarti, Karim

A2 - Caron, Jean-Francois

T2 - 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018

Y2 - 17 July 2018 through 19 July 2018

ER -