Model crystallization of salts and their migration in opuka stone – the local historic building material of Prague Castle Area, Czech Republic

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F24%3A00575148" target="_blank" >RIV/68378297:_____/24:00575148 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985912:_____/24:00575148

Výsledek na webu

<a href="https://doi.org/10.1007/978-3-031-39603-8_45" target="_blank" >https://doi.org/10.1007/978-3-031-39603-8_45</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-031-39603-8_45" target="_blank" >10.1007/978-3-031-39603-8_45</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Model crystallization of salts and their migration in opuka stone – the local historic building material of Prague Castle Area, Czech Republic

Popis výsledku v původním jazyce

Processes associated with crystallization and salt migration in building materials are important factors contributing to material degradation and subsequent damage. Archaeological structures located in the area of Prague Castle, for which the presence of salts and frequent climatic fluctuations are typical, are particularly vulnerable to salt-related deterioration. As part of the monitoring and closer research of the archaeological excavations of Prague Castle, long-term measurements of temperature and humidity were carried out in locations across the site. This data collection provided information on the effect of climatic cycles, including temperature and relative humidity changes, in the building materials. It was confirmed that the local opuka stone is highly susceptible to salt contamination and damage. The climate fluctuations cause critical conditions for dissolution and subsequent crystallization thresholds of the salts are regularly exceeded. This confirmed the significant impact of these cyclic changes in this archaeological area. In conjunction with data obtained from measurements of climatic cycles and opuka stone properties from the Third Courtyard of Prague Castle, a laboratory-based experiment was designed. The aim was to observe the crystallization and migration of salt in specimens of opuka stone. Stone specimens were immersed in sodium sulphate solution and exposed to specific climatic conditions (20 ℃ and 80, 70, 50 and 40% RH) that led to salt crystallization. The behaviour of salt was also studied under conditions where water vapor passes through the specimens. This experiment enabled the determination of the risk of damage as a function of salt crystallization in the opuka stone.

Název v anglickém jazyce

Model crystallization of salts and their migration in opuka stone – the local historic building material of Prague Castle Area, Czech Republic

Popis výsledku anglicky

Processes associated with crystallization and salt migration in building materials are important factors contributing to material degradation and subsequent damage. Archaeological structures located in the area of Prague Castle, for which the presence of salts and frequent climatic fluctuations are typical, are particularly vulnerable to salt-related deterioration. As part of the monitoring and closer research of the archaeological excavations of Prague Castle, long-term measurements of temperature and humidity were carried out in locations across the site. This data collection provided information on the effect of climatic cycles, including temperature and relative humidity changes, in the building materials. It was confirmed that the local opuka stone is highly susceptible to salt contamination and damage. The climate fluctuations cause critical conditions for dissolution and subsequent crystallization thresholds of the salts are regularly exceeded. This confirmed the significant impact of these cyclic changes in this archaeological area. In conjunction with data obtained from measurements of climatic cycles and opuka stone properties from the Third Courtyard of Prague Castle, a laboratory-based experiment was designed. The aim was to observe the crystallization and migration of salt in specimens of opuka stone. Stone specimens were immersed in sodium sulphate solution and exposed to specific climatic conditions (20 ℃ and 80, 70, 50 and 40% RH) that led to salt crystallization. The behaviour of salt was also studied under conditions where water vapor passes through the specimens. This experiment enabled the determination of the risk of damage as a function of salt crystallization in the opuka stone.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TL03000603" target="_blank" >TL03000603: Skryto pod povrchem. Archeologické terény Pražského hradu, jejich ochrana a prezentace v moderním světě.</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Structural analysis of historical constructions. SAHC 2023

ISBN

978-3-031-39602-1

ISSN

2211-0844

e-ISSN

2211-0852

Počet stran výsledku

15

Strana od-do

553-567

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

Kyoto

Datum konání akce

11. 9. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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