Quantification of vegetable oil content in lime mortar by thermal analysis

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68407700:21720/20:00343158

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantification of vegetable oil content in lime mortar by thermal analysis

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Quantification of vegetable oil content in lime mortar by thermal analysis

Popis výsledku anglicky

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

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA18-13525S" target="_blank" >GA18-13525S: Malty moderních mozaik pod drobnohledem - metody pro materiálovou charakterizaci a studium degradace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings 2275

ISBN

978-0-7354-4005-0

ISSN

—

e-ISSN

1551-7616

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

AIP Publishing, APL, the American Institute of Physics

Místo vydání

Melville, NY

Místo konání akce

Eger

Datum konání akce

2. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—