Effect of application of lime plasters to salt-laden bricks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00462129" target="_blank" >RIV/68378297:_____/16:00462129 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of application of lime plasters to salt-laden bricks

Popis výsledku v původním jazyce

Historic masonry is usually contaminated with soluble salts that change the properties of the original materials. The design of mortars for historical repairs should, therefore, take this condition into account. The aim of this study is to investigate the performance of lime plasters cured on a salt laden substrate. A lime mortar (L) and a lime mortar with a traditional hydrophobic admixture (LO) were applied to sodium sulphate laden bricks, and the properties of the plaster/brick systems were examined after curing. The results indicated that L mortar works as a salt-transporting plaster, whereas LO functions as a salt-blocking plaster and the salt accumulates preferentially at the interface between the plaster and the brick. The capillarity curves showed that the hydrophobic effect of LO plaster was significantly affected despite the small amount of salt that migrated from the brick to the plaster during curing. No change in the water absorption kinetics was observed for L plaster cured on a salt-laden brick and the drying process was only slightly altered while it extracted more than 50 wt.% of the salt initially present in the brick. In contrast, the hydrophobic plaster significantly reduced the drying rate in both salt-free and salt-contaminated bricks.

Název v anglickém jazyce

Effect of application of lime plasters to salt-laden bricks

Popis výsledku anglicky

Historic masonry is usually contaminated with soluble salts that change the properties of the original materials. The design of mortars for historical repairs should, therefore, take this condition into account. The aim of this study is to investigate the performance of lime plasters cured on a salt laden substrate. A lime mortar (L) and a lime mortar with a traditional hydrophobic admixture (LO) were applied to sodium sulphate laden bricks, and the properties of the plaster/brick systems were examined after curing. The results indicated that L mortar works as a salt-transporting plaster, whereas LO functions as a salt-blocking plaster and the salt accumulates preferentially at the interface between the plaster and the brick. The capillarity curves showed that the hydrophobic effect of LO plaster was significantly affected despite the small amount of salt that migrated from the brick to the plaster during curing. No change in the water absorption kinetics was observed for L plaster cured on a salt-laden brick and the drying process was only slightly altered while it extracted more than 50 wt.% of the salt initially present in the brick. In contrast, the hydrophobic plaster significantly reduced the drying rate in both salt-free and salt-contaminated bricks.

Druh

D - Stať ve sborníku

CEP obor

AL - Umění, architektura, kulturní dědictví

OECD FORD obor

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Projekt

<a href="/cs/project/LO1219" target="_blank" >LO1219: Udržitelný pokročilý rozvoj CET</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

International RILEM Conference on Materials, Systems and Structures in Civil Engineering. Segment on Historical Masonry

ISBN

978-2-35158-174-2

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

117-126

Název nakladatele

RILEM Publications

Místo vydání

Paris

Místo konání akce

Lyngby

Datum konání akce

22. 8. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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