Bond Behaviour of FRCM Composites: Effects of High Temperature

Abstract:

The fire remains one of the serious potential risks to most buildings and structures, as recently it’s been witnessed in Paris’ historic Notre Dame Cathedral and London’s Grenfell Tower. Concrete and masonry construction materials suffer physiochemical changes and mechanical damage caused by heating that is usually confined to the outer surface but can eventually compromise their load-bearing capacity. FRCM systems could provide when applied, supplemental fire insulation on pre-existing structural members, but there is a lack of knowledge about their properties in those conditions. This experimental work, thus, aims to evaluate the mechanical behaviour of carbon-FRCM and basalt-FRCM composites bonded to masonry substrate after high temperature exposure. Temperatures of 100 °C, 300 °C and 500 °C over a period of three hours were used to investigate the degradation of their mechanical properties. Single lap shear bond tests were carried out to evaluate the bond-slip response and failure modes. For all the tested temperatures higher peak stresses were measured for carbon-FRCM composite than basalt ones. Furthermore, low-density basalt-FRCM composite showed higher peak stresses and lower global slips up to 300 °C than high-density one. Carbon-FRCM composite failure mode was not effected by temperature. High-density basalt-FRCM composite showed a change in failure mode between 300 °C and 500 °C.

• Periodical: Key Engineering Materials (Volume 817)
• Pages: 161-166
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.817.161
• Online since: August 2019
• Authors: Antonio Iorfida, Sebastiano Candamano, Fortunato Crea, Luciano Ombres*, Salvatore Verre, Piero de Fazio
• Keywords: Basalt, Bond, Carbon, FRCM, High Temperature, Masonry

References

[1] C. Lamuta, S. Candamano, F. Crea, L. Pagnotta. Direct piezoelectric effect in geopolymeric mortars. Mater. Des. 107 (2016) 57-64.

DOI: 10.1016/j.matdes.2016.05.108

[2] S. Candamano, E. Sgambittera, C. Lamuta, L. Pagnotta, S. Chakraborty, F. Crea. Graphene nanoplatelets in geopolymeric systems: A new dimension of nanocomposites. Mater. Lett. 236 (2019) 550-553.

DOI: 10.1016/j.matlet.2018.11.022

[3] L. Carabba, M. Santandrea, C. Carloni, S. Manzi, M.C. Bignozzi. Steel fiber reinforced geopolymer matrix (S-FRGM) composites applied to reinforced concrete structures for strengthening applications: A preliminary study. Compos. Part B: Eng. 128 (2017) 83-90.

DOI: 10.1016/j.compositesb.2017.07.007

[4] I. Colombo, M. Colombo, A. Magri, G. Zani, M. di Prisco. Textile reinforced mortar at high temperatures. Appl. Mech. Mater. 82 (2011) 202–207.

DOI: 10.4028/www.scientific.net/amm.82.202

[5] F.A. Silva, M. Butler, S. Hempel, R.D. Toledo Filho, V. Mechtcherine. Effects of elevated temperatures on the interface properties of carbon textile-reinforced concrete. Cem. Concr. Compos. 48 (2014) 26-34.

DOI: 10.1016/j.cemconcomp.2014.01.007

[6] L. Ombres, A. Iorfida, S. Mazzuca, S. Verre. Bond analysis of thermally conditioned FRCM-masonry joints. Measurement 125 (2018) 509-515.

DOI: 10.1016/j.measurement.2018.05.021

[7] S.R. Maroudas, C.G. Papanicolau. Effect of high temperatures on the TRM-to-masonry bond. Key Eng. Mat. 747 (2017) 533-541.

DOI: 10.4028/www.scientific.net/kem.747.533

[8] J. Donnini, F. De Caso y Basalo, V. Corinaldesi, G. Lancioni, A. Nanni. Fabric-reinforced cementitious matrix behavior at high-temperature: experimental and numerical results. Compos. Part B: Eng. 108 (2017) 108–121.

DOI: 10.1016/j.compositesb.2016.10.004

[9] ASTM D3039/D3039M. Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials. ASTM International, (1995).

[10] CEN EN 1015-11:1999/A1:2006. Methods of test for mortar for masonry - Part 11: Determination of flexural and compressive strength of hardened mortar. CEN, Brussels, (2006).

DOI: 10.3403/01905442u

[11] CEN EN 772-1:2011/A1:2015. Methods of test for masonry units - Part 1: Determination of compressive strength. CEN, Brussels, (2015).

[12] A. Iorfida, S. Verre, S. Candamano, L. Ombres. Tensile and Direct Shear Responses of Basalt-Fibre Reinforced Mortar Based Materials,.

DOI: 10.1007/978-94-024-1194-2_63