Estimation of the linseed oil content in historic lime mortar

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F23%3A00565230" target="_blank" >RIV/68378297:_____/23:00565230 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/23:00362473 RIV/68407700:21720/23:00362473

Výsledek na webu

<a href="https://doi.org/10.1007/s10973-022-11792-9" target="_blank" >https://doi.org/10.1007/s10973-022-11792-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-022-11792-9" target="_blank" >10.1007/s10973-022-11792-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Estimation of the linseed oil content in historic lime mortar

Popis výsledku v původním jazyce

Vegetable oils (e.g. linseed or tung) were used as lime mortar admixtures in order to increase the mortar durability (due to the water repealing effect) and/or to prolong the mortar’s workability. The present paper aims to investigate the possibilities of thermal analysis to estimate the linseed oil content in a historic mortar. A set of model mortars containing Ca(OH)2, CaCO3 and variable amount of linseed oil was studied by methods usually used for mortars characterization: thermogravimetry with evolved gas analysis by mass spectroscopy (TG EGA-MS), FTIR spectroscopy (Fourier transform infrared spectroscopy) and XRD (powder X-ray diffraction). Oil admixed in lime mortar undergoes two principal transformations: saponification to Ca carboxylates and polymerization (drying). The products of the oil transformation are thermally decomposing during the thermal analysis experiment, but unfortunately in the same temperature range as Ca(OH)2—common mortar component—does. A calculation procedure which enables to determine content of both Ca(OH)2 and “oil products” on base of thermogravimetry was proposed. As an alternative, an estimation of oil content based on EGA-MS results for m/z 95 ion was developed. Finally, total organic carbon (TOC) may be also used if any other organics are not present. These three approaches were used for the oil content estimation in the sample of historic mosaic mortar. The result obtained by TG EGA-MS approach was found to be the most realistic.

Název v anglickém jazyce

Estimation of the linseed oil content in historic lime mortar

Popis výsledku anglicky

Vegetable oils (e.g. linseed or tung) were used as lime mortar admixtures in order to increase the mortar durability (due to the water repealing effect) and/or to prolong the mortar’s workability. The present paper aims to investigate the possibilities of thermal analysis to estimate the linseed oil content in a historic mortar. A set of model mortars containing Ca(OH)2, CaCO3 and variable amount of linseed oil was studied by methods usually used for mortars characterization: thermogravimetry with evolved gas analysis by mass spectroscopy (TG EGA-MS), FTIR spectroscopy (Fourier transform infrared spectroscopy) and XRD (powder X-ray diffraction). Oil admixed in lime mortar undergoes two principal transformations: saponification to Ca carboxylates and polymerization (drying). The products of the oil transformation are thermally decomposing during the thermal analysis experiment, but unfortunately in the same temperature range as Ca(OH)2—common mortar component—does. A calculation procedure which enables to determine content of both Ca(OH)2 and “oil products” on base of thermogravimetry was proposed. As an alternative, an estimation of oil content based on EGA-MS results for m/z 95 ion was developed. Finally, total organic carbon (TOC) may be also used if any other organics are not present. These three approaches were used for the oil content estimation in the sample of historic mosaic mortar. The result obtained by TG EGA-MS approach was found to be the most realistic.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials 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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

1588-2926

Svazek periodika

148

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

13

Strana od-do

697-709

Kód UT WoS článku

000886742300002

EID výsledku v databázi Scopus

2-s2.0-85142371304