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Non-destructive research of cement composite degradation using X-ray CT
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SYSNO ASEP 0511799 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Non-destructive research of cement composite degradation using X-ray CT Author(s) Zajícová, Vendula (UGN-S)
Souček, Kamil (UGN-S) RID, ORCID
Staš, Lubomír (UGN-S) RID, ORCID
Smoláková, M. (SK)Number of authors 4 Source Title SGEM 2019-19th International Multidisciplinary Scientific GeoConference, Science and Technologies in Geology, Exploration and Mining, 19. - Sofia : STEF92 Technology Ltd., 2019 - ISSN 1314-2704 - ISBN 978-619-7408-77-5 Pages s. 385-392 Number of pages 8 s. Publication form Online - E Action International Multidisciplinary Scientific GeoConference SGEM 2019 /19./ Event date 30.06.2019 - 06.07.2019 VEvent location Albena Country BG - Bulgaria Event type WRD Language eng - English Country BG - Bulgaria Keywords 3D visualization ; X-ray CT analysis ; digital image analysis ; microbiological degradation of cement composite material Subject RIV DH - Mining, incl. Coal Mining OECD category Mechanical engineering R&D Projects LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015084 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UGN-S - RVO:68145535 EID SCOPUS 85073691135 DOI 10.5593/sgem2019/1.2/S02.049 Annotation The paper describes the use of methods of visualization and non-destructive investigation of spatial distribution of changes in the structure of the monitored material, which was a cement composite with admixture of blast furnace slag. The test specimens in the shape of the cylinders with a diameter of 24mm and a height of 25mm were placed in an aggressive sulfate environment represented by bacteria of the microorganism Acidithiobacillus thiooxidans for 6 months. To investigate the spatial distribution and the degree of degradation of the affected area, the X-ray computed tomography (CT) method by Nikon XT H 225 ST industrial X-ray system scanner was used. The results were analyzed by VG Studio Max 3.2 software. Comparing the reference 3D images before and after the degradation tests has shown an aggressive microbacterial environment. The visible corrosion of the cement filling reaches a depth of approx. 3.5mm. At the same time, image analysis showed a remarkable transfer of material from the corrosion area to the outer and inner free surfaces of the sample. The precipitated material on the surfaces partially increased the geometric dimensions of the sample and caused partial ingrown of the communicative pores in the concete specimens. The analysis of the change in the density distribution of the material shows the ingrown of some pores in the material and indicates a change in the representation of individual density phases. This demonstrates the corrosion degradation of the material composition. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2020 Electronic address https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=5094
Number of the records: 1