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Title: THERMAL INSULATION REPAIR LIME PLASTER WITH PERLITE - FUNCTIONAL PARAMETERS AND SALT CRYSTALLIZATION RESISTANCE
THERMAL INSULATION REPAIR LIME PLASTER WITH PERLITE - FUNCTIONAL PARAMETERS AND SALT CRYSTALLIZATION RESISTANCE

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Martina Zaleska; Milena Pavlikova; Adam Pivak; Zbysek Pavlik
10.5593/sgem2022/6.1/s26.27
10.5593/sgem2022/6.1
1314-2704
978-619-7603-48-4
English
22
6.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Green Buildings Technologies and Materials
The aim of the presented work was to develop and evaluate the novel thermal insulation plaster intended for repair and renovation application. The thermal parameters of the reference lime plaster were enhanced with the substitution of 50 vol. % of silica sand with expanded perlite. The hardened plasters were characterized by their specific density, bulk density, total open porosity, compressive strength, flexural strength, and dynamic modulus of elasticity. The thermal conductivity and the volumetric heat capacity were investigated as well. As the studied plasters should find use in repair of salt-laden masonry, the specific attention was paid to the assessment of their durability in terms of resistance to salt damage. Plasters were subjected to the accelerated laboratory salt crystallization test that consisted of ten wetting/drying cycles, where the used salt was sodium chloride. For comparison, the same process was performed with distilled water. The salt crystallization resistance was evaluated using the photographical observations and the measurement of the residual compressive strength. The results obtained showed that the use of expanded perlite allows the development of the lightweight repair plaster with sufficient mechanical parameters and improved thermal insulation properties. Moreover, the high porosity of lime-perlite plaster has contributed to its great durability against salt crystallization.
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Authors greatly acknowledge the financial support received from the Czech Science Foundation under project No 21-06582S - Experimental and computational analysis of salt transport, accumulation, and crystallization in non-hydrophobized rendering mortars. This research has been also partially supported by the Grant Agency of the Czech Technical University in Prague, grant No SGS20/153/OHK1/3T/11.
conference
https://doi.org/10.5593/sgem2022/6.1/s26.27
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
209-216
04 - 10 July, 2022
website
8654
salt crystallization resistance, repair lime plaster, perlite, sodium chloride