Towards a new salt crystallisation test: comparison of salt contamination procedures
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F21%3A00547449" target="_blank" >RIV/68378297:_____/21:00547449 - isvavai.cz</a>
Result on the web
<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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Alternative languages
Result language
angličtina
Original language name
Towards a new salt crystallisation test: comparison of salt contamination procedures
Original language description
The RILEM TC 271-ASC is currently developing a new ageing test to assess the resistance of porous building materials to salt crystallisation. The new test consists of two phases: salt accumulation and damage propagation. This paper focuses on the salt accumulation phase - this phase should promote salt crystallisation close to the evaporative surface of the substrates (common situation onsite) without leading to salt efflorescence or damage. Damage should take place in the propagation phase, which is not addressed in this paper. This work compares the effectiveness of three contamination procedures for salt accumulation: P1) salt contamination by capillary absorption of salt solution, followed by drying - P2) continuous capillary absorption of salt solution - P3) placement of salt crystals on the surface of the materials followed by the conditioning of the specimens at high relative humidity until complete dissolution of the salts. The results of P1 and P2 procedures presented in this paper are detailed in a separate publication, while this paper focuses on P3 procedure and compares the results. The effectiveness of each procedure has been evaluated by assessing the salt distribution in the specimen using ion chromatography and scanning electron microscopy. The results show that P3 is technically the least complicated to set up and does not entail the risk of development of salt efflorescence or damage. However, it can lead to salt migration within the specimens to a greater depth, hence future research is proposed to counteract this effect.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
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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Number of pages
9
Pages from-to
69-77
Publisher name
TU Delft Open
Place of publication
Delft
Event location
Delft
Event date
Sep 22, 2021
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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