Practical application of lime-pozzolan mortars to damp masonry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F19%3A00505886" target="_blank" >RIV/68378297:_____/19:00505886 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.rilem.net/publication/publication/494" target="_blank" >https://www.rilem.net/publication/publication/494</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Practical application of lime-pozzolan mortars to damp masonry

Popis výsledku v původním jazyce

The purpose of this study was to evaluate the performance of experimental lime-metakaolin renders in real conditions. For in situ testing, a cemetery fencing wall was chosen which, as demonstrated by a previous survey, was loaded with a high degree of moisture and water-soluble salts. This paper is focused on the visual and chemical-mineralogical characterization of the renders two years after application. Samples were taken from both the upper and lower parts of the wall. The analyses showed low concentrations of water-soluble salts (0.01-0.03 wt.%) in the samples collected in the lower parts, while in contrast, the upper parts contained high concentrations up to 2.5 wt.% of salts. TGA and XRD analyses revealed that the high water content in the stained areas did not allow the carbonation reaction to take place to its full extent, while the pozzolanic reaction between the lime and the metakaolin was supported in these conditions. Lime-metakaolin renders are highly prone to colour change (moisture retention) due to the presence of pores in the 0.01-0.1 μm size range.

Název v anglickém jazyce

Practical application of lime-pozzolan mortars to damp masonry

Popis výsledku anglicky

The purpose of this study was to evaluate the performance of experimental lime-metakaolin renders in real conditions. For in situ testing, a cemetery fencing wall was chosen which, as demonstrated by a previous survey, was loaded with a high degree of moisture and water-soluble salts. This paper is focused on the visual and chemical-mineralogical characterization of the renders two years after application. Samples were taken from both the upper and lower parts of the wall. The analyses showed low concentrations of water-soluble salts (0.01-0.03 wt.%) in the samples collected in the lower parts, while in contrast, the upper parts contained high concentrations up to 2.5 wt.% of salts. TGA and XRD analyses revealed that the high water content in the stained areas did not allow the carbonation reaction to take place to its full extent, while the pozzolanic reaction between the lime and the metakaolin was supported in these conditions. Lime-metakaolin renders are highly prone to colour change (moisture retention) due to the presence of pores in the 0.01-0.1 μm size range.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA18-28142S" target="_blank" >GA18-28142S: Vliv lněného oleje na transportní vlastnosti vápenných nátěrů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

5th Historic Mortars Conference. Proceedings of the 5th Historic Mortars Conference

ISBN

978-2-35158-221-3

ISSN

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e-ISSN

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Počet stran výsledku

13

Strana od-do

973-985

Název nakladatele

RILEM Publications

Místo vydání

Paris

Místo konání akce

Pamplona

Datum konání akce

19. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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