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Shear bond of composites-to-brick applied with highly deformable, in relation to resin epoxy, interface materials

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Abstract

The paper presents comparison of a work of stiff and flexible bonds fastening composite strengthening to masonry. In the first approach (traditional), barely deformable interface material made of stiff epoxy resin is used as shear bonds of composites-to-brick. In the second one (innovative), highly deformable interface material made of flexible polymer is used as repair shear bonds of composites-to-brick. Behavior of both materials was compared using single-lap shear tests made on four kinds of fiber fabrics (glass, carbon, basalt and steel) applied to clay brick units. The results indicated that highly deformable interface materials allow increasing load capacity, because deformable adhesive layers reduce shear stress concentrations in bond, redistributing stress more evenly along the whole lap joint. Usefulness of the theory which allows calculating the bond shear stress–slip characteristic was also discussed in accordance to the highly deformable interface materials.

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Acknowledgments

The author would like to thank Bogusław Zając for his help in preparing specimens with the highly deformed adhesive and Piotr Kuboń for his help in numerical calculations. I am particularly grateful to SIKA Poland for their support in the experimental activity and to Italian companies: Fidia Technical Global Service and SGM Laboratory, Perugia (Italy), for the provision of composite materials and for availability of facilities for making specimens, respectively and SanMarco-Terreal Italian, Noale (Venice, Italy) for providing the bricks.

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  1. Faculty of Civil Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155, Cracow, Poland

    Arkadiusz Kwiecień

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  1. Arkadiusz Kwiecień
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Correspondence to Arkadiusz Kwiecień.

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Kwiecień, A. Shear bond of composites-to-brick applied with highly deformable, in relation to resin epoxy, interface materials. Mater Struct 47, 2005–2020 (2014). https://doi.org/10.1617/s11527-014-0363-y

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