Effect of pore structure on the performance of photocatalytic lightweight lime-based finishing mortar

Giosuè, Chiara; Yu, Qingliang; Ruello, Maria Letizia; Tittarelli, Francesca; Brouwers, Hjh Jos

doi:10.1016/j.conbuildmat.2018.03.106

Cited by 36 publications

(15 citation statements)

References 61 publications

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“…Larger pore size (1 μm) was found to be responsible for salt damage of porous stones (Benavente et al 2004). 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.…”

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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“…Over the last few decades, the development of novel multifunctional materials for both structural and non-structural applications has been particularly interesting. In particular, recent studies report the use of highly porous aggregates [1][2][3] or nano-photocatalytic materials [4][5][6] for indoor air quality improvement, smart compounds containing phase change materials [7,8] for enhancing the thermo-energy efficiency and conductive additions for developing self-sensing materials [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests

et al. 2018

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This paper presents the resistivity and piezoresistivity behavior of cement-based mortars manufactured with graphene nanoplatelet filler (GNP), virgin carbon fibers (VCF) and recycled carbon fibers (RCF). GNP was added at 4% of the cement weight, whereas two percentages of carbon fibers were chosen, namely 0.05% and 0.2% of the total volume. The combined effect of both filler and fibers was also investigated. Mortars were studied in terms of their mechanical properties (under flexure and compression) and electrical resistivity. Mortars with the lowest electrical resistivity values were also subjected to cyclic uniaxial compression to evaluate the variations in electrical resistivity as a function of strain. The results obtained show that mortars have piezoresistive behavior only if they are subjected to a prior drying process. In addition, dry specimens exhibit a high piezoresistivity only when loaded with 0.2 vol.% of VCF and 0.4 wt.% of GNP plus 0.2 vol.% RCF, with a quite reversible relation between their fractional change in resistivity (FCR) and compressive strain.

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“…is result is due to the increased total porosity of mortar ( Figure 3) [3,10]; in fact, the higher the porosity, the higher the total water absorbed in time [54,55]. e partial substitution of S1 with F1 increases the amount of water penetrated in the mortar by the capillary action compared to the reference.…”

Section: Resultsmentioning

confidence: 99%

Bricks and Concrete Wastes as Coarse and Fine Aggregates in Sustainable Mortars

Mobili

Giosuè

Corinaldesi

et al. 2018

Advances in Materials Science and Engineering

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The total substitution by volume of natural coarse calcareous aggregate by coarse recycled brick aggregate (RBA) and coarse recycled concrete aggregate (RCA) has been investigated to produce more sustainable and environment-friendly mortars. Aggregates were also partially substituted by their fines at 12.5% by volume. Mortars have been tested in terms of mechanical, microstructural, and durability properties. Results show that it is feasible to replace a natural calcareous aggregate entirely by recycled aggregates. In particular, the obtained mortars, even if more porous and more prone to the water capillary absorption than that manufactured with natural aggregates, result in less stiffness and thus are less subjected to crack formation, more permeable to water vapour, and less susceptible to sulphate attack.

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Effect of pore structure on the performance of photocatalytic lightweight lime-based finishing mortar

Cited by 36 publications

References 61 publications

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

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

Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests

Bricks and Concrete Wastes as Coarse and Fine Aggregates in Sustainable Mortars

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