Compression behaviour of clay bricks prisms, wallets and walls - Coating influence

Azevedo, António C.; Guimarães, Ana Sofia; Silva, Fernando Artur; Oliveira, R. B. R. S.

doi:10.7764/rdlc.18.1.123

Cited by 5 publications

(10 citation statements)

References 7 publications

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“…And as retrofit for historic buildings, when the use of epoxy resins is not allowed or suitable, as in stone masonry or reversible applications [3,30,47,49]. The revised documents also covered masonry rehabilitation, the increase of load capacity on structural bearing walls [11,46], retrofit due to seismic activity [3,7,10,12,13,22,30,45,47,49,50], coating influence in compressive strength [6], and reinforcement of arches and masonry vaults [51]. A recent study also covered a detailed characterization of AFG meshes for reinforcement use [51].…”

Section: Strengthening and Retrofittingmentioning

confidence: 99%

“…Layers between 25 and 30 mm are the most used, with almost half of the studies within 10 to 20 mm. Although thicker layers are related to a higher mechanical strength of test walls, other variables such as mesh opening and the use of connectors are more significant for performance [6,13,45]. 94% of the studies employed connectors to fix the meshes, like L or U-shaped fiberglass stripes, metal bolts, or steel hooks, fixed mechanically or chemically by use of mortar or epoxy.…”

Section: Strengthening and Retrofittingmentioning

confidence: 99%

“…This system characterizes the external visual, customizes the inner rooms, regulates waterproofing, thermic and acoustic insulation, fire safety, and many other factors involved in maintainability and usage [4,5]. Mortar coatings also enhance the mechanical behavior of masonries by slenderness reduction, cross-section increase, and stress distribution [6,7]. Masonry performance can be improved even more if reinforcing meshes are embedded in the coating layer, a technique known for its low cost, ease of execution, and high compatibility with multiple materials [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Mesh reinforcement in masonry mortar coatings: a systematic literature review

Coelho

Silva

2023

Cerâmica

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Mortar coatings have a major influence on a building's aesthetics, valorization, and habitability, with significant effects on the mechanical behavior of masonry walls. Multiple types of meshes can be embedded in plaster to enhance both masonry and coating's mechanical behavior, restrain crack formation, enhance the bonding between layers, and increase the wall's seismic resistance. The reinforcement technique has simple execution and is suitable for many applications, including the strengthening of non-load bearing walls, façade performance improvement, and restoration of historical buildings. However, there is an absence of guidelines and specifications for design and execution, resulting in high variability in field applications due to the many variables involved and few in-depth studies. This paper presents a systematic review of the effects of mesh reinforcement in cementitious mortar coatings and its major applications. Mortar and mesh parameters and influences, the status of analytical and simulation models, and suggestions for future research are described.

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Section: Strengthening and Retrofittingmentioning

confidence: 99%

Section: Strengthening and Retrofittingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mesh reinforcement in masonry mortar coatings: a systematic literature review

Coelho

Silva

2023

Cerâmica

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“…O emprego de telas em matrizes cimentícias é conhecido por apresentar baixo custo, ser de fácil execução e compatível com diferentes cenários de aplicação (superfícies molhadas ou baixas temperaturas), produzindo bons resultados no controle de fissuração de elementos de concreto (KOUTAS et al, 2018) e no aumento da resistência mecânica de painéis de alvenaria (OLIVEIRA et al, 2017(OLIVEIRA et al, , 2018AZEVEDO et al, 2019).…”

Section: Referencial Teóricounclassified

Desempenho do revestimento de argamassas reforçadas com telas: estudo de fissuração e do comportamento mecânico

et al. 2020

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Resumo A utilização das telas para reforço da camada de revestimento em fachadas tem se tornado uma excelente aliada na prevenção e redução de fissuras, pois podem absorver as tensões que surgem no sistema de revestimento. Esta pesquisa busca avaliar a incidência de fissuras de revestimentos reforçados com telas, submetidos à variação térmica, visando contribuir para o conhecimento do desempenho e comportamento das telas nos revestimentos argamassados. Para tanto, foi avaliada a resistência à tração direta de três telas (uma de polietileno e duas galvanizadas) a serem empregadas como reforço em argamassas analisadas quanto à resistência à compressão, tração, flexão e cisalhamento. Em seguida, foram construídos protótipos de fachadas revestidos com reboco reforçado com tela observando-se o comportamento do sistema após carregamento térmico (38 ºC e 80 ºC) por meio de termografia, mapeamento de fissuras e resistência ao impacto, avaliando-se, ainda, a eficiência de duas metodologias de reparo de fissuração (tela poliéster com massa acrílica e resina epóxi). Os resultados revelaram que a tela galvanizada eletrossoldada apresentou melhor desempenho ao absorver parte das tensões e reduzir as aberturas das fissuras, garantindo ao conjunto melhor resistência à flexão, e ambas as metodologias de reparo analisadas apresentaram desempenho adequado ante a exposição térmica.

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“…On the other hand, infill wall brick types, features and usage are varied from one region to another in the world. As opposed to United States, hollow clay bricks are still popular in the Southern Europe [19][20][21], Middle East [22,23], and South America [24]. Moreover, those walls are coated with a concrete plaster and ASTM C1314-14 [17] also does not cover plastered brick units.…”

Section: Introductionmentioning

confidence: 99%

Estimating the Seismic Strength of Infill Walls by Means of Hollow Brick Prism Tests

Özbek

Karakuş²

2022

Period. Polytech. Civil Eng.

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Architectural infill walls interact with the surrounding reinforced concrete load bearing members of the building under lateral earthquake loads and can change the system behavior significantly. Therefore, lateral strength calculation of these walls may become mandatory for the designers. These infill walls often formed with horizontally-hollow clay based bricks in many regions of the world. However, strength of these bricks depends on the loading direction and bricks remain in the diagonal compression strut of an infill wall are subjected to biaxial compression. Thus, testing procedures investigate the strength only in the direction perpendicular to the bed-joint seems insufficient to reflect actual behavior. Accordingly, it is confusing for designers to determine or consider compressive strength of hollow clay bricks in order to model and calculate the strength of an infill wall. To clear up this confusion, the seismic strength of plastered infill walls made up of horizontally-hollow bricks were tried to be estimated by various prism tests. The effects of loading direction, plaster, and presence of a single or double brick on prism strength were experimentally investigated. Six reference walls and more than 170 prism specimens were tested in accordance with this scope. The correlation between prism and infill wall strength was established with a valid and practical method. Results showed that diagonally loaded plastered prism group successfully and adequately estimated the experimental infill wall strength. In addition, if diagonal testing is not possible to conduct, the average strength of the vertically and horizontally loaded prism tests may be used instead.

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Compression behaviour of clay bricks prisms, wallets and walls - Coating influence

Cited by 5 publications

References 7 publications

Mesh reinforcement in masonry mortar coatings: a systematic literature review

Mesh reinforcement in masonry mortar coatings: a systematic literature review

Desempenho do revestimento de argamassas reforçadas com telas: estudo de fissuração e do comportamento mecânico

Estimating the Seismic Strength of Infill Walls by Means of Hollow Brick Prism Tests

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