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SALT CRYSTALLIZATION TEST OF REPAIR LIME PLASTER CONTAINING ZEOLITE

Zaleska, M.; Pavlikova, M.; Pivak, A.; Jankovsky, O.; Pavlik, Z.
Abstract:
Natural zeolites having a structure with a large number of cavities allow design lightweight plasters with improved thermal insulation parameters. Focusing on the assessment of plasters’ durability, their resistance to salt damage should to be taken into consideration, especially in case of their application in repair of salt laden masonry. Although the crystallization of salts in plasters presents a serious problem, there is as yet no standard procedure for its evaluation. To predict salt damage of lime-based plasters in practice, they were subjected to accelerated laboratory salt crystallization test, where sodium chloride solution and cyclic drying and wetting were the observed degradation factors. Studied materials were lime plaster and lime-zeolite plaster, where zeolite was used as a full replacement of silica sand. A comprehensive characterization of both plasters performed before crystallization test cycles included specific density, bulk density, total open porosity, compressive strength, flexural strength, and dynamic modulus of elasticity tests. The assessment of salt damage was done based on the photographical observations, optical microscopy, and mass change after salt crystallization experiment. Obtained results of the plasters’ durability with respect to the salt resistance provided the necessary information for improvement of laboratory salt crystallization tests.
SGEM Research areas:
Year:
2021
Type of Publication:
In Proceedings
Keywords:
salt damage; crystallization test; lime plaster; zeolite; sodium chloride
Editor:
• Prof. DSc. Oleksandr Trofymchuk, UKRAINE • Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Volume:
21
SGEM Book title:
21st International Multidisciplinary Scientific GeoConference SGEM 2021
Book number:
6.1
SGEM Series:
SGEM International Multidisciplinary Scientific GeoConference
Pages:
271-278
Publisher address:
51 Al. Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
Period:
16 - 22 August, 2021
ISBN:
978-619-7603-30-9
ISSN:
1314-2704
Conference:
21st International Multidisciplinary Scientific GeoConference SGEM 2021, 16 - 22 August, 2021
DOI:
10.5593/sgem2021/6.1/s26.53
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