Quantification of vegetable oil content in lime mortar by thermal analysis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00343158" target="_blank" >RIV/68407700:21110/20:00343158 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21720/20:00343158
Result on the web
<a href="https://doi.org/10.1063/5.0025879" target="_blank" >https://doi.org/10.1063/5.0025879</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0025879" target="_blank" >10.1063/5.0025879</a>

Result language
angličtina
Original language name
Quantification of vegetable oil content in lime mortar by thermal analysis
Original language description
Locally available vegetable oils and their derivates have been used since ancient times as admixtures in lime based mortars. Oil, due to its hydrophobic nature, acts as a water-repealing admixture and thus improves the durability of mortar. Further it may modify the pore size distribution of solid mortar as well as rheology of the fresh one. On the other hand, the presence of hydrophobic oil in mortar causes the reduction of carbonation and hydration (in case of hydraulic lime) and thus its dosage is a sensitive issue. Determination of the oil content in a sample of historic mortar is important for proper restoring of the given building or e.g. mosaic. There is currently not any standard procedure for quantification of an oil content in a solid matrix such is mortar. The present contribution aims to evaluate possibilities to determine content of oil in lime mortar by help of thermogravimetry with Evolved Gas Analysis. Set of model samples containing portlandite, calcite and various doses of linseed oil (0-20 % of dry components) was prepared. The results indicated that the solely thermogravimetry is not able to provide the desired information, but the EGA, especially the m/z = 55 signal, can be used as semiquantitative indicator of the oil content. REFERENCES
Czech name
—
Czech description
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Project
<a href="/en/project/GA18-13525S" target="_blank" >GA18-13525S: Modern mosaic mortars in a microscope – methods for their materials characterization and degradation studies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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