PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 42 (2022) 769–776

23 European Conference on Fracture - ECF23 Carbon textile reinforced mortar to masonry bond: An experimental investigation Makashev Kuanysh a , Serik Tokbolat b a S. Toraighyrov Pavlodar State University, Pavlodar, Kazakhstan, email: makashevkuanysh10@gmail.com b School of Architecture, Design and the Built Environment, Nottingham Trent University, Nottingham, UK b

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 Abstract The utilization of high-performance composite materials for the repair and strengthening of existing masonry structures is a common practice among the engineering community at present. To this point, textile reinforced mortars (TRM) have been recognized to be an efficient technique for the strengthening of the unreinforced masonry. TRMs comprise a textile fibre material impregnated within an inorganic matrix that is externally bonded to the masonry surface. A key parameter that controls the effectiveness of any externally bonded system is the bond between the mortar, the reinforced fibres, and the substrate; this has been often identified as the weak link in TRM strengthening. The effect of the strengthening mortar on the bond strength is not widely investigated. However, in some studies, the strengthening mortar defines as one of the crucial parameters to the TRM to masonry bond behavior. Hence, a number of experimental studies have been conducted to highlight the bonding performance of TRM. However, results are in many cases contradicting due to the inherent complexity of the problem that stems from the uncertainties characterizing the constituent material structural properties. Therefore, more experimental results are required to inform the investigation of the TRM to masonry bond mechanics. In this work, preliminary results from an experimental study on the masonry to TRM bond by means of single-lap shear tests with regards to 150mm bond lengths are presented. The parameter of the investigation was the type of mortar matrices. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: masonry; mortar; TRM; HPC; HPFRC 1. Introduction During the past decades, the upgrading reinforcement of existing buildings and structures became a vital issue. The deterioration, ageing, a lack of maintenance and other factors reduce the service life of buildings and structures. The need to meet the current design requirements of existing buildings and structures also challenges the current engineering practice. For years, textile have been widely used to reinforce concrete. Such strengthening system has several names that commonly appear in the literature as textile-reinforced mortar (TRM) (Bournas et al., 2007) or textile-reinforced concrete (Kong et al., 2017; Kariou, Triantafyllou and Bournas, 2019). This is a essentially the

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.097