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Utilization of X-ray computed micro-tomography to evaluate iron sulphide distribution in roofing slates
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SYSNO ASEP 0486977 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Utilization of X-ray computed micro-tomography to evaluate iron sulphide distribution in roofing slates Author(s) Vavro, Martin (UGN-S) RID, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Daněk, T. (CZ)
Matýsek, D. (CZ)
Georgiovská, Lucie (UGN-S)
Zajícová, Vendula (UGN-S)Number of authors 6 Source Title Quarterly Journal of Engineering Geology and Hydrogeology. - : Geological Society Publishing House - ISSN 1470-9236
Roč. 51, č. 2 (2018), s. 169-178Number of pages 10 s. Publication form Online - E Language eng - English Country GB - United Kingdom Keywords roofing slate ; iron sulphides ; X-ray CT ; slate pathologies ; dimension stone Subject RIV JN - Civil Engineering OECD category Civil engineering R&D Projects LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UGN-S - RVO:68145535 UT WOS 000435589000003 DOI 10.1144/qjegh2016-108 Annotation Slate is a traditional stone product that has long been used for roofing widely around the world. The presence of iron
sulphides is one of the most significant factors affecting roofing slate resistance to weathering and, therefore, the quality of
slates and their use in construction. Iron sulphide oxidation is the main process of roofing slate degradation. Qualitative and
quantitative analyses to determine iron sulphides in roofing slates are usually conducted using transmitted and reflected light
microscopy, and X-ray diffraction techniques. However, this paper presents X-ray computed micro-tomography as a new
laboratory method in this field, which also allows for 3D visualization and analysis of iron sulphide distribution in roofing
slates. It also discusses some technical limits of this technique and tomographic scan interpretation pitfalls. The results obtained
by tomographic observations were subsequently verified by optical microscopy, X-ray powder diffraction and scanning
electron microscopy, as well as energy-dispersive X-ray spectroscopy analyses. Spanish slate from the Ordovician Luarca
Formation and Culm slate from the Moravice Formation in the Czech Republic are both characterized by low to extremely low
iron sulphide content, and for this reason were selected for this study.Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2019 Electronic address https://qjegh.lyellcollection.org/content/51/2/169
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