Mechanical Strength Indicators of Polyurethane Adhesive in Lightweight Floor Systems

  • 1 Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology


The article describes the basic features of the lightweight floor system with heat-dissipating lamellas (LFS-L) that do not require screeds and are used in the design of radiant heating. It was assumed that reactive polyurethane adhesive constitute the connection layer between the ceramic tile floor and the thermal insulation substrate, which is covered with aluminium foil. This type of construction has not been fully tested for mechanical strength. To define it, for example, using the finite element method, strength indicators of the tested adhesives which were not used in any of the previous studies discussed in this paper should be determined, such as Young’s modulus E, Poisson’s ratio ν and linear thermal expansion coefficient α. This article presents research methods by which these data were determined. Module E and the ν ratio were determined in the compression strength test of cylindrical samples of polyurethane adhesive. Coefficient α was determined by using digital image correlation in the Aramis system, placing the prepared adhesive samples in a thermal chamber.

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  • ASTM E132 – 17. Standard Test Method for Poisson’s Ratio at Room Temperature.

  • ASTM E111 – 17. Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus.

  • Ashikuzzaman, Md., Tarif Uddin, A., Zahidul, A., Altaf Hossain, Md. (2018). Effect of Brick Forming Load on Mechanical Properties of FlyAsh Bricks. Tr Civil Eng & Arch, 3(2), 1–6. TCEIA.MS.ID.000157. DOI: 10.32474/TCEIA.2018.03.000157

  • Bednarski, L., Sienko, R., Howiacki, T. (2014). Oszacowanie wartosci i zmiennosci modulu sprezystosci betonu w istniejacej konstrukcji na podstawie ciaglych pomiarow in situ. CWB, 6, 396–404.

  • Boronski, D. (2004). The effect of the method of determination of Young’s modulus on the estimation of fatigue life of structural elements. Journal of theoretical and applied mechanics, 42(2), 269–83.

  • BS EN 1015-11:2019. Methods of test for mortar for masonry. Determination of flexural and compressive strength of hardened mortar.

  • EN 1991-1-1:2004. Eurocode 1: Actions on structures – Part 1-1: General actions - Densities, self-weight, imposed loads for buildings.

  • EN 485-2:2016+A1:2018. Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties.

  • EN ISO 10545-8:2014. Ceramic tiles. Determination of linear thermal expansion.

  • Ferretti, F., Incerti, A., Ferracuti, B., Mazzotti, C. (2016). Diagonal compression tests on masonry panels strengthened by FRP and FRCM. In Proc. of SAHC 2016, 13-15. Leuven, Belgium.

  • Galman, I. (2012). PhD Thesis: Sciany z ceramicznej cegly pelnej cyklicznie sciskanej w swej płaszczyznie lub zginane prostopadle do plaszczyzny. Gliwice: Katedra Konstrukcji Budowlanych. Wydzial Budownictwa, Politechnika Sląska.

  • Karpiesiuk, J., Chyzy, T. (2017). Wyniki eksperymentalnych badan rozkladu temperatury grzejnikow plaszczyznowych o lekkiej konstrukcji bez jastrychow. Rynek Instalacyjny, 11(XXV), 45–50.

  • Karpiesiuk, J., Chyzy, T. (2017). Wyniki wybranych badań wytrzymałości międzyfazowej lekkiego grzejnika płaszczyznowego z rozpraszaczami ciepła. Civil and Environmental Engineering/Budownictwo i Inżynieria Środowiska, 8(3), 123–132.

  • Kwiecien, A., Hojdys, L., Krajewski, P., Tekieli, M. (2017). Differences in strain distribution of stiff mineral and flexible polyurethane adhesives in DIC observation. COST Action TU1207, Next Generation Design Guidelines for Composites in Construction. Retrieved from (date of access: 2020/02/15).

  • Nejati, M., Dambly, M.L.T., Saar, M.O. (2019). A methodology to determine the elastic properties of anisotropic rocks from a single uniaxial compression test. Journal of Rock Mechanics and Geotechnical Engineering, 11, 1166–1183.

  • NORDTEST Method NT VVS127: UDC 697.1: Approved 2001-11. Floor heating systems. Design and type testing of waterborne heat systems for lightweight structures.

  • PN-B-04500:1971. Zaprawy budowlane – Badania cech fizycznych i wytrzymalosciowych.

  • Product catalogue Fibran S.A. (September 2011). Extruded polystyrene thermal insulation FIBRANxps.

  • Werner-Juszczuk, A.J. (2018). Experimental and numerical investigation of lightweight floor heating with metallised polyethylene radiant sheet. Energy & Buildings, 177, 23–32.

  • Zając, B. (2018). Scinane polaczenia klejone sztywne i podatne pracujące w podwyższonej temperaturze. Kraków: Politechnika Krakowska.


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