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Non-destructive research of cement composite degradation using X-ray CT
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SYSNO ASEP 0511799 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Non-destructive research of cement composite degradation using X-ray CT Tvůrce(i) Zajícová, Vendula (UGN-S)
Souček, Kamil (UGN-S) RID, ORCID
Staš, Lubomír (UGN-S) RID, ORCID
Smoláková, M. (SK)Celkový počet autorů 4 Zdroj.dok. 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 Rozsah stran s. 385-392 Poč.str. 8 s. Forma vydání Online - E Akce International Multidisciplinary Scientific GeoConference SGEM 2019 /19./ Datum konání 30.06.2019 - 06.07.2019 Místo konání Albena Země BG - Bulharsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. BG - Bulharsko Klíč. slova 3D visualization ; X-ray CT analysis ; digital image analysis ; microbiological degradation of cement composite material Vědní obor RIV DH - Báňský průmysl vč. těžby a zpracování uhlí Obor OECD Mechanical engineering CEP LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015084 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UGN-S - RVO:68145535 EID SCOPUS 85073691135 DOI 10.5593/sgem2019/1.2/S02.049 Anotace 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. Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2020 Elektronická adresa https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=5094
Počet záznamů: 1