Number of the records: 1
Utilisation of X-Ray computed microtomography for evaluation of iron sulphide distribution in roofing slate
- 1.
SYSNO ASEP 0460700 Document Type A - Abstract R&D Document Type O - Ostatní Title Utilisation of X-Ray computed microtomography for evaluation of iron sulphide distribution in roofing slate Author(s) Souček, Kamil (UGN-S) RID, ORCID
Daněk, T. (CZ)
Vavro, Martin (UGN-S) RID, ORCID
Botula, J. (CZ)Number of authors 4 Source Title Geophysical Research Abstracts. - Göttingen : European Geosciences Union, 2016 - ISSN 1607-7962 Number of pages 1 s. Publication form Online - E Action EGU General Assembly Event date 18.04.2016 - 22.04.2016 VEvent location Vienna Country AT - Austria Event type WRD Language eng - English Country DE - Germany Keywords roofing slate ; X-Ray computed microtomography ; natural stone Subject RIV JQ - Machines ; Tools Institutional support UGN-S - RVO:68145535 Annotation Roofing slate represents a traditional natural stone used for centuries for roofing and other construction applications
in various types of buildings. Quality roofing slate must be primarily splittable into large, thin and waterproof
tiles. In addition, it must be stable in colour and resistant against weathering. The abundance of mineral phases that
weather easily or minerals that are long-term unstable has the effect of reducing the durability of slates in exterior
conditions. One of the most problematic rock components, which are in a larger or smaller extent present in almost
all slates, are iron sulphides, such as pyrite, marcasite or pyrrhotite. Under common atmospheric conditions,
these minerals tend to oxidise, which leads to the formation of limonite and sulphuric acid. As a consequence of
the origin of red-brown Fe oxyhydroxides, the undesirable colour changes of the slate may occur. But the most
serious problem which occurs during this process is the changes in volume. This can cause disintegration of slate
depending on the form of the iron sulphide occurrence.
The content and size distribution of iron sulphides in roofing slate is normally determined using the microscopic
analysis in transmitted light, combined with the observation in reflected light. For quantitative determination of
iron sulphides in slate, the X-Ray powder diffraction is also often used. The results of the microscopic and X-Ray
analyses need to be mutually compared and should not differ fundamentally.
This paper is focused on the assessing the possibility of application of the X-Ray computed microtomography
(CT) as a new complementary technique enabling the analysis of content and size (volume) distribution of
iron sulphides in roofing slate.Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2017 Electronic address http://meetingorganizer.copernicus.org/EGU2016/EGU2016-2779.pdf
Number of the records: 1