Number of the records: 1
The effect of the sodium sulphate solution exposure on properties and mechanical resistance of different kinds of renders
- 1.
SYSNO ASEP 0494096 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The effect of the sodium sulphate solution exposure on properties and mechanical resistance of different kinds of renders Author(s) Pavlíková, M. (CZ)
Pokorný, J. (CZ)
Jankovský, J. (CZ)
Záleská, M. (CZ)
Vavro, Martin (UGN-S) RID, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Pavlík, Z. (CZ)Number of authors 7 Source Title Ceramics - Silikáty. - : University of Chemistry and Technology Prague - ISSN 0862-5468
Roč. 62, č. 4 (2018), s. 311-324Number of pages 14 s. Publication form Online - E Language eng - English Country CZ - Czech Republic Keywords sulphate attack ; renders ; mechanical resistance ; X-Ray CT ; chemically induced damage Subject RIV CB - Analytical Chemistry, Separation OECD category Analytical chemistry Institutional support UGN-S - RVO:68145535 UT WOS 000455110000001 DOI 10.13168/cs.2018.0027 Annotation The effect of 5% water solution of the sodium sulphate and the reference environment of distilled water on changes in mechanical resistance of the commercial dry render mixes was researched in the paper. The prism-shaped specimens cured 28 days in humid and stable conditions were immersed in water or sodium sulphate water solution. At chosen time, the particular specimens were collected, dried to constant mass, and subjected to tests. The maximum time of specimen exposure to moisture or salt action was 168 days. Within the performed experiments, length changes, mass gain, mechanical and basic properties were measured in order to reveal the effect of sulphate corrosion on researched materials. Additionally, pore size distribution measurement and X-Ray CT analysis for the most damaged render were done, in order to characterize the disruptive impact of sulphate solution on porous microstructure of lime-metakaolin-based render. The obtained data revealed the high capacity of porous space of the tested renders for salt storage. For shorter times of exposure to salt action, most of the studied renders exhibited improvement in mechanical resistance. On the other hand, after the full filling of the porous space, the evoked crystallization pressures led to the decrease in mechanical resistance and materials damage. However, one type of studied renders originally designed for restoration of salt laden masonry maintained its excellent mechanical properties even after 168 days of sulphate exposure. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2019 Electronic address https://www.irsm.cas.cz/materialy/cs_content/2018_doi/Pavlikova_CS_2018_0027.pdf
Number of the records: 1