Assessment of salt distribution in Maastricht and Migné limestones with the use of micro-destructive techniques

Kód výsledku v IS VaVaI

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Výsledek na webu

<a href="https://books.bk.tudelft.nl/press/catalog/view/791/901/887-1" target="_blank" >https://books.bk.tudelft.nl/press/catalog/view/791/901/887-1</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Assessment of salt distribution in Maastricht and Migné limestones with the use of micro-destructive techniques

Popis výsledku v původním jazyce

The durability of building materials against salt crystallization is currently assessed using standardized and other accelerated weathering laboratory tests. However, these test methods usually do not simulate the performance of a material in practicenrealistically. Therefore, they do not always shed enough light on the evaluation of the salt crystallization phenomenon and the prevention of its damaging results. This study focuses on the use of two micro-destructive cutting techniques, based on the measurement of scratching and drilling resistance, to assess salt distribution within Maastricht and Migné limestones, following the procedure developed within the framework of RILEM TC ASC-271 activities for the accumulation of salts. Data collected on freshly quarried reference samples and samples contaminated with NaCl and Na2SO4 are presented. The results, which are entirely in line with complementary μ-XRF measurements, vividly show changes in the microstructure of the salt-contaminated samples. These changes, which are reflected in increased cutting resistance peaks, are consistent in both the scratching and drilling resistance patterns, and they suggest that salts accumulate at or near the evaporation surface of the test specimens, resulting in pore clogging.

Název v anglickém jazyce

Assessment of salt distribution in Maastricht and Migné limestones with the use of micro-destructive techniques

Popis výsledku anglicky

The durability of building materials against salt crystallization is currently assessed using standardized and other accelerated weathering laboratory tests. However, these test methods usually do not simulate the performance of a material in practicenrealistically. Therefore, they do not always shed enough light on the evaluation of the salt crystallization phenomenon and the prevention of its damaging results. This study focuses on the use of two micro-destructive cutting techniques, based on the measurement of scratching and drilling resistance, to assess salt distribution within Maastricht and Migné limestones, following the procedure developed within the framework of RILEM TC ASC-271 activities for the accumulation of salts. Data collected on freshly quarried reference samples and samples contaminated with NaCl and Na2SO4 are presented. The results, which are entirely in line with complementary μ-XRF measurements, vividly show changes in the microstructure of the salt-contaminated samples. These changes, which are reflected in increased cutting resistance peaks, are consistent in both the scratching and drilling resistance patterns, and they suggest that salts accumulate at or near the evaporation surface of the test specimens, resulting in pore clogging.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of SWBSS 2021. Fifth International conference on salt weathering of buildings and stone sculptures

ISBN

978-94-6366-439-4

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

153-162

Název nakladatele

TU Delft Open

Místo vydání

Delft

Místo konání akce

Delft

Datum konání akce

22. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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