Masonry Panels Composite Reinforcements with Epoxy Matrix, Inorganic Mortar Matrix and PS Polymer Matrix

Viskovic, Alberto; Zuccarino, Luigia; Kwiecień, Arkadiusz; Zając, Bogusław

doi:10.4028/www.scientific.net/kem.624.214

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…The reduction of these peaks by redistributing the shear stresses over a larger bond area may lead to an increase of the overall shear strength of the system, as already demonstrated by former studies on highly deformable adhesives [21][22][23], such as flexible polyurethane polymer PS [23]. The use of such kind of matrices to bond composite reinforcements to brittle substrates has recently proven its effectiveness in laboratory tests on small [24][25][26][27][28] and large scale [1,21,[29][30][31] specimens, together with high ductility [28,30], good removability [26] and thermal compatibility with masonry [31,32].…”

Section: Introductionmentioning

confidence: 94%

Repair of composite-to-masonry bond using flexible matrix

et al. 2015

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The paper presents an experimental investigation on an innovative repair method, in which composite reinforcements, after debonding, are re-bonded to the substrate using a highly deformable polymer. In order to assess the effectiveness of this solution, shear bond tests were carried out on brick and masonry substrates within two Round Robin Test series organized by the RILEM TC 250-CSM: Composites for the Sustainable strengthening of Masonry. Five laboratories from Italy, Poland and Portugal were involved. The shear bond performance of the reinforcement systems before and after repair were compared in terms of ultimate loads, load–displacement curves and strain distributions. The results showed that the proposed repair method may provide higher strength and ductility than stiff epoxy resins, making it an effective and cost efficient technique for several perspective structural applications

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Section: Introductionmentioning

confidence: 94%

Repair of composite-to-masonry bond using flexible matrix

et al. 2015

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“…The pioneers in the study of TRM strengthening systems and prediction models for the shear strength of strengthened brick, concrete, and stone unreinforced masonry URM walls are [5,6,[13][14][15][16]. The results showed the strengthened and non-strengthened URM failure modes.…”

Section: Literature Overviewmentioning

confidence: 99%

Failure Mode Prediction of Unreinforced Masonry (URM) Walls Retrofitted with Cementitious Textile Reinforced Mortar (TRM)

Thomoglou

Karabini

Achillopoulou

et al. 2023

Fibers

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The brittle failure of unreinforced masonry (URM) walls when subjected to in-plane loads present low shear strength remains a critical issue. The investigation presented in this paper touches on the retrofitting of URM structures with textile-reinforced mortar (TRM), which enables shifting the shear failure mode from a brittle to a pseudo-ductile mode. Despite many guidelines for applying composite materials for retrofitting and predicting the performance of strengthened structures, the application of TRM systems in masonry walls is not extensively described. A thorough retrospect of the literature is presented, containing research results relating to different masonry walls, e.g., bricks, cement, and stone blocks strengthened with TRM jackets and subjected to diagonal compression loads. The critical issue of this study is the failure mode of the retrofitted masonry walls. Available prediction models are presented, and their predictions are compared to the experimental results based on their failure modes. The novelty of this study is the more accurate failure mode prediction of reinforced masonry with TRM and also of the shear strength with the proposed model, Thomoglou et al., 2020, at an optimal level compared to existing regulations and models. The novel prediction model estimates the shear failure mode of the strengthened wall while considering the contribution of all components, e.g., block, render mortar, strengthening textile, and cementitious matrix, by modifying the expressions of the Eurocode 8 provisions. The results have shown that the proposed model presents an optimum accuracy in predicting the failure mode of all different masonry walls strengthened with various TRM jackets and could be taken into account in the regulations for reliable forecasting.

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“…The deformable injected material is compatible with masonry from the mechanical point of view, because it does not introduce stress concentrations in cracked structure of brittle behavior (polymer PM is characterized by low stiffness), as it is present using epoxy or mineral injections of higher stiffness. The different behavior among polymer PM, epoxy and mortar, in relation to their stiffness, is well highlighted using those materials as matrixes for surface reinforcement with fibers, [10,11,12].…”

Section: State Of Artmentioning

confidence: 99%

Quick Seismic Protection of Weak Masonry Infilling in Filled Framed Structures Using Flexible Joints

Viskovic

Zuccarino

Kwiecień

et al. 2017

KEM

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This paper deals with research related to repair and strengthening of weak and brittle masonry infills in R.C. or steel frame structures. Masonry infills are commonly used in 20th century architectural heritage residential and office buildings. In case of earthquake damage to the weak and brittle masonry infills the commercial buildings go out of service and residents of residential buildings are prohibited from living in their homes although the main frame structure is not damaged. The new retrofitting method proposed in this paper may be either a preventive seismic improvement or a quick emergency intervention before seismic aftershocks: it is proposed to use a polymer PM to fill new horizontal and vertical joints between infilling masonry and frame or to fill cracks generated by the earthquake. The test results presented in the paper confirmed ability of polymer PM to fulfil requirements of quick repair material for seismic area.

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Masonry Panels Composite Reinforcements with Epoxy Matrix, Inorganic Mortar Matrix and PS Polymer Matrix

Cited by 4 publications

References 8 publications

Repair of composite-to-masonry bond using flexible matrix

Repair of composite-to-masonry bond using flexible matrix

Failure Mode Prediction of Unreinforced Masonry (URM) Walls Retrofitted with Cementitious Textile Reinforced Mortar (TRM)

Quick Seismic Protection of Weak Masonry Infilling in Filled Framed Structures Using Flexible Joints

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