Preliminary Results on Natural Aging of GFRP-Reinforced Masonry Components Exposed to Outdoor Environmental Conditions

Rafael Ramirez; Bahman Ghiassi; Daniel V. Oliveira; Paulo B. Lourenço

doi:10.4028/p-tyg4l7

Paper Titles

Durability of Polyurethane Matrix in Composite Strengthening for Masonry
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Preliminary Results on Natural Aging of GFRP-Reinforced Masonry Components Exposed to Outdoor Environmental Conditions
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Long-Term Durability of Inorganic Matrix Composite (IMC) Systems under Sustained Tensile Loading
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Influence of Freeze/Thaw and Alkaline Environment on the Mechanical Properties of a C-FRCM System Bonded on Masonry Substrate
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Durability of a Glass Fabric-Reinforced Cementitious Matrix Composite under Different Environmental Conditions
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Durability of Stainless-Steel Reinforced Grout against Salt Attack
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Tensile Behavior of FRCM Coupons under Thermal Stresses
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Mechanical Behaviour of Glass Fibers FRCM and CRM Systems after Ageing in Alkaline Environments
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Preliminary Results on Natural Aging of GFRP-Reinforced Masonry Components Exposed to Outdoor Environmental Conditions

Abstract:

Fiber reinforced polymers (FRP) have been widely used for strengthening and repair of masonry structures since the 1990s. Although the short-term performance of such systems has been extensively studied, their durability and long-term behavior are still scarcely known. Therefore, a better understanding of the corresponding degradation mechanisms and durability issues is of major interest, especially in cases of externally bonded systems where the materials are prone to undergo a more severe decay. Different accelerated aging tests have been developed in order to simulate weathering conditions in a shorter time: water immersion, freeze-thaw, hygrothermal cycles, salt crystallization, UV radiation, etc. Nonetheless, accelerated aging data cannot be used to make reliable service life estimations without a clear correlation with real environmental processes. In this study, we present the preliminary results (3/12 years) of a real exposure experimental campaign devoted to analyzing the natural aging of masonry components reinforced with externally bonded glass fibers (GFRP). The aging conditions consist of: (a) direct outdoor exposure, i.e. outdoor hygrothermal variation + sun and rain; (b) indirect outdoor exposure, i.e. outdoor hygrothermal variation + sheltered from sun and rain; (c) laboratory conditions as control group. The specimens consist of solid extruded fired-clay bricks strengthened with unidirectional GFRP sheets following the wet lay-up procedure. The aging effects on bond performance are studied by means of single-lap shear tests. Finally, the effect of brick surface treatment and the application of an external render on bond durability is investigated.

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Periodical:

Key Engineering Materials (Volume 916)

Pages:

11-18

DOI:

https://doi.org/10.4028/p-tyg4l7

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Online since:

April 2022

Authors:

Rafael Ramirez*, Bahman Ghiassi, Daniel V. Oliveira, Paulo B. Lourenço

Keywords:

Bond Degradation, Durability, GFRP-Reinforced Masonry, Natural Ageing, Single-Lap Shear Test

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References

[1] M.R. Valluzzi, Strengthening of Masonry Structures with Fibre Reinforced Plastics: from Modern Conception to Historical Building Preservation, in: D. D'Ayala, E. Fodde (Eds.), Struct. Anal. Hist. Constr. Preserv. Saf. Significance, Taylor & Francis, London, UK, 2008: p.33–45.

DOI: 10.1201/9781439828229.ch4

Google Scholar

[2] D. V. Oliveira, I. Basilio, P.B. Lourenço, Experimental bond behavior of FRP sheets glued on brick masonry, J. Compos. Constr. 15 (2011) 32–41.

DOI: 10.1061/(asce)cc.1943-5614.0000147

Google Scholar

[3] C. Faella, G. Camorani, E. Martinelli, S.O. Paciello, F. Perri, Bond behaviour of FRP strips glued on masonry: Experimental investigation and empirical formulation, Constr. Build. Mater. 31 (2012) 353–363.

DOI: 10.1016/j.conbuildmat.2011.12.100

Google Scholar

[4] R. Capozucca, Effects of mortar layers in the delamination of GFRP bonded to historic masonry, Compos. Part B Eng. 44 (2013) 639–649.

DOI: 10.1016/j.compositesb.2012.02.012

Google Scholar

[5] S. Briccoli Bati, T. Rotunno, Environmental durability of the bond between CFRP composite materials and masonry structures, in: P.B. Lourenço, P. Roca (Eds.), Hist. Constr., 2001: p.1039–1046.

Google Scholar

[6] P. Desiderio, L. Feo, Durability Evaluation of EBR CFRP Strengthened Masonry Structures, in: Proc. Int. Symp. Bond Behav. FRP Struct. (BBFS 2005), 2005: p.481–488.

Google Scholar

[7] M.S. Sciolti, M. Frigione, M.A. Aiello, Wet lay-up manufactured FRPs for concrete and masonry repair: Influence of water on the properties of composites and on their epoxy components, J. Compos. Constr. 14 (2010) 823–833.

DOI: 10.1061/(asce)cc.1943-5614.0000132

Google Scholar

[8] H. Maljaee, B. Ghiassi, P.B. Lourenço, D. V. Oliveira, Moisture-induced degradation of interfacial bond in FRP-strengthened masonry, Compos. Part B Eng. 87 (2016) 47–58.

DOI: 10.1016/j.compositesb.2015.10.022

Google Scholar

[9] H. Maljaee, B. Ghiassi, P.B. Lourenço, D. V. Oliveira, FRP–brick masonry bond degradation under hygrothermal conditions, Compos. Struct. 147 (2016) 143–154.

DOI: 10.1016/j.compstruct.2016.03.037

Google Scholar

[10] M.A. Aiello, B. Ghiassi, P.B. Lourenço, FRP-strengthened masonry, in: B. Ghiassi, P.B. Lourenço (Eds.), Long-Term Perform. Durab. Mason. Struct., Elsevier, 2019: p.209–238.

DOI: 10.1016/b978-0-08-102110-1.00007-8

Google Scholar

[11] B. Ghiassi, G. Marcari, D. V. Oliveira, P.B. Lourenço, Water degrading effects on the bond behavior in FRP-strengthened masonry, Compos. Part B Eng. 54 (2013) 11–19.

DOI: 10.1016/j.compositesb.2013.04.074

Google Scholar

[12] R. Martin, Ageing of composites, Woodhead Publishing Limited, Cambridge, UK, 2008.

Google Scholar

[13] H. Maljaee, B. Ghiassi, P.B. Lourenço, Effect of synergistic environmental conditions on thermal properties of a cold curing epoxy resin, Compos. Part B Eng. 113 (2017) 152–163.

DOI: 10.1016/j.compositesb.2017.01.027

Google Scholar