Resistance of Lime-Natural Pozzolan Mortars in Salt-Laden Environments
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU148940" target="_blank" >RIV/00216305:26110/23:PU148940 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/978-3-031-33211-1_63" target="_blank" >http://dx.doi.org/10.1007/978-3-031-33211-1_63</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/978-3-031-33211-1_63" target="_blank" >10.1007/978-3-031-33211-1_63</a>
Alternative languages
Result language
angličtina
Original language name
Resistance of Lime-Natural Pozzolan Mortars in Salt-Laden Environments
Original language description
Salt crystallization belongs to the main decay processes in historic masonry mortars in which lime-pozzolan binders were often used. In this paper, the resistance to salts crystallization, their accumulation, and the microstructural changes of lime mortars with five different natural pozzolans are thoroughly investigated. Natural, fine ground, thermally untreated pozzolans (chalcedonite, pumice, zeolite, spongilite, and lava) were used as a partial replacement for lime in the amount of 10%, 20%, and 40%. The salt crystallization resistance of mortars were determined using Na2SO4, NaCl, and NH4NO3 solutions. The microstructure of the mortars after the testing was monitored with a scanning electron microscope, the accumulation of anions in the mortars was determined by chemical analyses and mass increases, and the formation of new minerals was confirmed using X-ray diffraction analysis. Nitrates were most accumulated in mortars with lava, sulfates in spongilite mortars, and chlorides in mortars with chalcedonite. Both crystalline and amorphous neoplasms were observed in the microstructures of mortars, the most common being nitrocalcite, cesanite, gypsum, ettringite, and hydrocalumite. The results showed that different natural pozzolans are a bit more suited to different saline environments and it should be considered when using them.
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
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/GA21-06582S" target="_blank" >GA21-06582S: Experimental and computational analysis of salt transport, accumulation, and crystallization in non-hydrophobized rendering mortars</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, SynerCrete’23
ISBN
978-3-031-33211-1
ISSN
2211-0844
e-ISSN
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Number of pages
10
Pages from-to
697-706
Publisher name
Springer Cham
Place of publication
neuveden
Event location
Mílos
Event date
Jun 14, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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