Porosity and compatibility of repair mortars and Hungarian porous limestones

Szemerey-Kiss, Balázs; Török, Ákos

doi:10.1556/ceugeol.55.2012.2.1

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…In this line, the calcarenites cemented by smaller calcite grains and with higher pore size (BC-Y1 and BC-Y2) exhibit greater strength reductions due to water saturation than the varieties cemented by greater calcite grains and with lower pore diameters (BC-BL, BC-BG and BC-DM). These results are in agreement with those found by Török [49], Papay and Török [50] and Török and Szemerey-Kiss [51], [52], who observed that the limestones cemented by fine grained micrite calcite are more water sensitive in terms of strength and durability than those cemented by micro-sparitic calcite. In addition, they also found the existence of a close relationship between the pore structures and the mechanical properties of Hungarian limestones.…”

Section: Variation Of Mechanical Properties Due To Water Saturationsupporting

confidence: 92%

Effect of water saturation on strength and deformability of building calcarenite stones: Correlations with their physical properties

Rabat

Cano

Tomás

2020

Construction and Building Materials

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Stone construction elements are frequently in moist environments or in direct contact with water. Design and test standards have traditionally ignored the water impact on rock materials. However, several studies have shown that moisture can cause drastic strength reductions and deformability increase in some sedimentary rocks. For that reason, the main objectives of this work are: a) to quantify and understand the influence of water saturation on strength and deformability of four porous calcarenite building stones widely used in SE Spain ; b) to establish correlations between physical and mechanical properties of these rock materials in dry and saturated states and c) to compare the results with previous findings. The results showed a very significant reduction of mechanical properties such as unconfined compressive strength, Young´s modulus and point load strength index when these stones undergo saturated. In addition, significant correlations between physical properties (density, porosity, P wave velocity and dynamic elastic parameters) and the mentioned mechanical properties were established in dry and saturated conditions. Additionally, relationships among the mechanical properties of stones in both states are also proposed.

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Section: Variation Of Mechanical Properties Due To Water Saturationsupporting

confidence: 92%

Effect of water saturation on strength and deformability of building calcarenite stones: Correlations with their physical properties

Rabat

Cano

Tomás

2020

Construction and Building Materials

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“…2). The textural properties of these limestone types have been described in previous works (Török 2003, Pápay and Török 2010, Szemerey-Kiss and Török 2012. These limestone/mortar samples were also prepared in stainless steel casts.…”

Section: Sample Preparationmentioning

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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“…When attempting to escape the masonry, the water would commonly escape through the mortar joint, the stone, or the brick. A high capillarity causes moisture to pass in greater volume that can cause moisture retention, putting the masonry at a more susceptible state that encourages salt formations and problematic freeze/thaw issues [17]. Therefore, mortars/substrate compatibility criteria are always related to physical parameters, such as porosity and hydric properties.…”

Section: Introductionmentioning

confidence: 99%

A Selection Method for Restoration Mortars Using Sustainability and Compatibility Criteria

et al. 2022

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This work proposes sustainability criteria for the selection or design of restoration mortars based on their physical and mechanical properties, durability, price in the French market, and the environmental impact estimated by the global warming potential. A score is assigned to the mortars based on normalized values of their physical and mechanical properties. A total of 24 formulations of restoration mortars were characterized, and their scores were compared. A case study showing the application of the proposed selection method is presented, focused on the restoration of historical monuments in Paris, France, built with Lutetian and Euville stones. In this case, hydraulic lime mortars were the most sustainable options. The application of the method is also projected for global application, as showcased for the restoration of Mayan stones in Southern Mexico.

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Porosity and compatibility of repair mortars and Hungarian porous limestones

Cited by 9 publications

References 39 publications

Effect of water saturation on strength and deformability of building calcarenite stones: Correlations with their physical properties

Effect of water saturation on strength and deformability of building calcarenite stones: Correlations with their physical properties

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

A Selection Method for Restoration Mortars Using Sustainability and Compatibility Criteria

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