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X-Ray CT inspection of subsurface areas of concretes exposed to fast flowing liquids
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SYSNO ASEP 0533193 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV O - Ostatní Název X-Ray CT inspection of subsurface areas of concretes exposed to fast flowing liquids Tvůrce(i) Sitek, Libor (UGN-S) RID, ORCID
Hlaváček, Petr (UGN-S) RID, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Bodnárová, L. (CZ)
Foldyna, Josef (UGN-S) RID, ORCID
Zajícová, Vendula (UGN-S)
Berčáková, Andrea (UGN-S)
Foldyna, Vladimír (UGN-S)Celkový počet autorů 8 Zdroj.dok. New trends in production engineering, 2. - Warszawa : Sciendo, 2019 / Kotwica Krzysztof - ISSN 2545-2843 - ISBN 978-3-11-067479-8 Rozsah stran s. 450-459 Poč.str. 10 s. Forma vydání Online - E Akce International Conference “Mining Techniques” TUR 2019 /11./ Datum konání 17.09.2019 - 20.09.2019 Místo konání Krynica Země PL - Polsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova erosion ; concrete ; fast flowing liquid ; high-speed water jets ; X-Ray CT Vědní obor RIV JN - Stavebnictví Obor OECD Civil engineering CEP GA18-25035S GA ČR - Grantová agentura ČR LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UGN-S - RVO:68145535 DOI 10.2478/ntpe-2019-0048 Anotace Concrete structures affected for a long time by flowing liquids are exposed to gradual erosion in surface layers caused by a combination of several degradation processes: abrasion, cavitation and chemical or bacterial impacts. Due to the complex phenomena and difficult-to-define initial and boundary conditions, the whole process cannot be easily simulated using the conventional computing tools. Laboratory experimental research is thus the most appropriate approach for the investigation of a suitable composition of concrete resistant to the flowing liquids. However, the methods used are often very time consuming and last even several years. High-speed water flows can be elegantly used for the acceleration of the mechanical simulation of a real situation. Several experiments on the effects of the high-speed water flows on concrete surfaces have been carried out. Using the X-Ray CT methods, subsurface structures of concretes exposed to the accelerated mechanical simulation of the erosion wear caused by fast flowing liquids were investigated and presented in the article. It has been shown that the simulation does not cause initiation of new fractures or cracks in the original concrete structure. The pure water flow mainly removes the hardened cement paste and reveals the aggregate grains. The water flow with abrasive particles disintegrates in greater depths and washes out entire aggregate grains, eventually amputates them and finally smoothens entire surface. Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2021 Elektronická adresa https://content.sciendo.com/view/journals/ntpe/2/1/article-p450.xml?product=sciendo
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