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FRPU Composite Protection of Masonry with Reversible Mineral Interlayer

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Structural Analysis of Historical Constructions (SAHC 2023)

Part of the book series: RILEM Bookseries ((RILEM,volume 46))

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Abstract

The paper presents the results of preliminary tests of a newly proposed Fiber Reinforced Polyurethane (FRPU) composite system with mineral interlayer for strengthening of heritage structures in seismic areas. The analyzed FRPU system consisted of strips of an unidirectional textile of Ultra High Tensile Strength Steel (UHTSS) cords embedded in a two-component highly deformable polyurethane. In the tests a layer of composite was applied to clay bricks covered with 6 mm-thick layer of hardened mortar. In this research two types of mortars were considered: a lime-based mortar and a cement-base one. The specimens were tested in a single lap shear test (SLST). The presence of mineral interlayer resulted in reduction in shear bond strength of the composite to brick when compared to reference specimens without mortar layer. The tests results indicated that the use of mortar layer did not significantly modify shear stiffness of the connection between the FRPU strengthening system and clay brick substrate. The results of the tests shown that the tested strengthening system seems to be an effective and reversible solution for strengthening of heritage masonry structures.

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Acknowledgements

Authors acknowledge help of companies: Kerakoll SpA (Sassuolo, Italy) provided the steel textiles, FlexAndRobust Systems Sp. z o.o. (Kraków, Poland) provided the polyurethane PS matrix, San Marco (Terreal, Italy) supplied clay bricks. The technical support of Mr. Stanislaw Kańka for the laboratory tests in Cracow University of Technology is kindly acknowledged.

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Authors and Affiliations

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

    Arkadiusz Kwiecień, Łukasz Hojdys, Piotr Krajewski & Marcin Tekieli

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  1. Arkadiusz Kwiecień
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  2. Łukasz Hojdys
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  3. Piotr Krajewski
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  4. Marcin Tekieli
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Correspondence to Arkadiusz Kwiecień .

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Editors and Affiliations

  1. Department of Architecture, Shinshu University, Nagano, Japan

    Yohei Endo

  2. Department of Architecture, Mie University, Tsu City, Mie, Japan

    Toshikazu Hanazato

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Kwiecień, A., Hojdys, Ł., Krajewski, P., Tekieli, M. (2024). FRPU Composite Protection of Masonry with Reversible Mineral Interlayer. In: Endo, Y., Hanazato, T. (eds) Structural Analysis of Historical Constructions. SAHC 2023. RILEM Bookseries, vol 46. Springer, Cham. https://doi.org/10.1007/978-3-031-39450-8_71

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  • DOI: https://doi.org/10.1007/978-3-031-39450-8_71

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-39449-2

  • Online ISBN: 978-3-031-39450-8

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