Failure mechanisms of repair mortar stone interface assessed by pull-off strength tests

Szemerey-Kiss, Balázs; Török, Ákos

doi:10.1007/s10064-016-0964-5

Cited by 16 publications

(5 citation statements)

References 37 publications

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“…The pore size also controls the durability of mortars (Papayianni and Stefanidou 2006, Grilo et al 2014, Korat et al 2015, Giosuè et al 2018. Thus, natural stone and mortar durability are closely related (Klisińska-Kopacz et al 2010, Rivas et al 2010, Yu and Oguchi 2010, Schueremans et al 2011, Szemerey-Kiss and Török 2011a, 2017aSzemerey-Kiss et al 2013, Isebaert et al 2014. The strength of mortars against crystallization pressure is also controlled by microfabric, mineralogical composition, and pore structure (Arizzi and Cultrone 2012, Szemerey-Kiss and Török 2011b, Pavia and Hanley 2010, Lanas et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Freeze-thaw durability of repair mortars and porous limestone: compatibility issues

Török

Szemerey-Kiss

2019

Prog Earth Planet Sci

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Freeze-thaw cycles can cause considerable damage to porous materials and thus have an adverse effect on the durability of mortars and porous stone. To assess the behavior and frost resistance of two types of porous limestone, three commercially available repair mortars and four mixtures of laboratory-prepared repair mortars were subjected to freeze-thaw cycles according to EN 12371. During the test, samples of stone and mortar were bonded together and the weight loss was continuously monitored. The adhesion bond between the stone and the mortar was also observed during the cycles. Petrographic analysis and thin sections were also made before and after the freeze-thaw test. The pore size distribution (mercury intrusion porosimetry, MIP) of mortars and stones was also measured. The test showed that most of the repair mortars were damage more than porous limestone due to frost action. Two exceptions are two commercial available repair mortars. These mortars were able to keep the adhesion with the stone, and the frost did not modify significantly the cubic shape of the test specimens, only rounding of the edges was observed. All other samples were broken during the frost tests; stone/mortar interface was dismounted. Other typical damage features such as delamination, blistering, powdering, and granular disintegration were also observed leading to the gradual surface loss of the material. Our tests proved that low pozzolanic cement content in mortars decreases the material durability. According to the pore size distribution (MIP), the small pores (around 0.1 μm) control the weathering behavior of tested porous materials.

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Section: Introductionmentioning

confidence: 99%

Freeze-thaw durability of repair mortars and porous limestone: compatibility issues

Török

Szemerey-Kiss

2019

Prog Earth Planet Sci

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“…The fracture mode shown in Figure 3d is an adhesive fracture and the fracture occurs at the interface between the cement mortar and concrete substrate. When this type of fracture occurs, the obtained data represent the adhesion that causes the mortar layer to detach from the concrete substrate [33].…”

Section: Pull-out Testmentioning

confidence: 99%

Effect of Thermal Cycles and Curing Age on Bonding Strength of Cement Mortar Using Manufactured Sand

Cui,

Peng,

Yang

et al. 2024

Buildings

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The bonding of cement mortar to the concrete substrate is crucial in buildings. In this study, cement mortar was prepared using manufactured sand (MS) instead of river sand (RS). The bonding strength between manufactured sand mortar (MSM) and concrete substrate was evaluated and the effects of curing age, water-to-cement ratio (w/c) and thermal cycling on the bonding strength were discussed and compared with those of the river sand mortar (RSM). The compressive strength of the MSM was consistently higher than that of the RSM, while the bonding strength of RSM was consistently higher than that of MSM, indicating that the bonding strength does not depend on the compressive strength of the mortar. As the number of thermal cycles increased, the pull-off strengths at the interface between the concrete and MSM or RSM at different w/c ratios all decreased, and the RSM experienced a larger reduction. After 400 cycles, the percentage decrease in bonding strength of MSM sample ranged from 18.62% to 30.86%.

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“…De acordo com Moropoulou, Bakolas e Bisbikoun (2000), o comportamento da argamassa é assim influenciado pelas características do suporte e da interface que se vai criar entre estes dois elementos. Vários autores (PALMER; PARSON, 1934;AGUIAR;CRUZ, 1998;CARVALHO JUNIOR, 2002;CARASEK, 2009;SZEMEREY-KISS;TÖRÖK, 2017) têmse debruçado sobre o estudo da interface argamassa-suporte e dos fatores que influenciam a aderência entre esses dois elementos. No entanto, no que diz respeito à investigação sobre a alteração das características das argamassas após aplicação nos suportes, ainda são escassos os trabalhos de investigação.…”

Section: Introductionunclassified

Interface argamassa-suporte: análise das características físicas com base em várias campanhas experimentais

Torres

Flores‐Colen

Silveira³

et al. 2020

Ambient. constr.

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Resumo Os revestimentos de paredes mais usados em Portugal, e mesmo ano âmbito europeu e mundial, continuam sendo as argamassas de revestimento, quer sejam à base de cal ou de cimento, quer sejam tradicionais, feitas em obra ou pré-doseadas. De acordo com a normalização disponível, o estudo de desempenho dessas argamassas é realizado sobre provetes produzidos em laboratório, com medidas normalizadas e em condições de cura e de ensaio pré-estabelecidas. No entanto, quando as argamassas são aplicadas sobre os suportes reais o seu comportamento final não será exatamente o mesmo. As dimensões, as condições de aplicação e as condições de cura são distintas. Assim, é consensual dizer que as características finais dos rebocos aplicados em condições reais de exposição serão distintas das obtidas em laboratório. O estudo que se pretende apresentar faz parte de uma investigação mais alargada no âmbito do projeto IF Mortar, em que se pretende analisar a influência das características de diversos suportes nas características de diferentes tipos de argamassa, para se prever, de forma mais rigorosa, qual o comportamento final das argamassas após sua aplicação. Neste artigo são apresentados alguns dos resultados já obtidos em campanhas experimentais, relativos às características físicas de diversas argamassas aplicadas sobre distintos suportes.

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Failure mechanisms of repair mortar stone interface assessed by pull-off strength tests

Cited by 16 publications

References 37 publications

Freeze-thaw durability of repair mortars and porous limestone: compatibility issues

Freeze-thaw durability of repair mortars and porous limestone: compatibility issues

Effect of Thermal Cycles and Curing Age on Bonding Strength of Cement Mortar Using Manufactured Sand

Interface argamassa-suporte: análise das características físicas com base em várias campanhas experimentais

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