Mechanical Properties of Reproduced Historic Mosaic Mortar

Pavla Bauerová; Pavel Reiterman; Magdalena Kracík Štorkánová; Martin Keppert

doi:10.4028/www.scientific.net/SSP.325.86

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HomeSolid State PhenomenaSolid State Phenomena Vol. 325Mechanical Properties of Reproduced Historic...

Mechanical Properties of Reproduced Historic Mosaic Mortar

Abstract:

Mortars containing linseed oil as admixture to lime were identified in several mosaics found in Czech Republic. These mosaics were made around 1900 and the composition of their bedding mortar was likely influenced by publication La Mosaïque by E. Gerspach [1], published in Paris, 1880. The recipe for lime mortar with linseed oil and stand oil has been reproduced within the present paper. Four mixes were prepared with varying oil/stand oil content (below, above and according to Gerspach’s recommendation). The primary motivation of mosaic artists to use oil admixture was to keep the mortar’s plasticity for longer time, what is beneficial for the mosaic tesseraes (stones) adjustment. This effect was quantified by help of Vicat apparatus. The influence of oils on mechanical properties and carbonation was evaluated at 28 days. It was found by XRD, that the rate of carbonation is reduced due to the oil presence. It is caused by fact that the oil acts also as water-repealing admixture what reduces the ability of aerial CO₂ to dissolve in pore solution and react with lime. The deformation behavior of material has been modified by oil toward the higher toughness, but lower compressive strength, due to polymeration of oil in mortar.

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Periodical:

Solid State Phenomena (Volume 325)

Pages:

86-91

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.325.86

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Online since:

October 2021

Authors:

Pavla Bauerová, Pavel Reiterman*, Magdalena Kracík Štorkánová, Martin Keppert

Keywords:

Historic Mortars, Linseed Oil, Mechanical Properties

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