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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 Document Type C - Proceedings Paper (int. conf.) R&D Document Type O - Ostatní Title X-Ray CT inspection of subsurface areas of concretes exposed to fast flowing liquids Author(s) 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)Number of authors 8 Source Title New trends in production engineering, 2. - Warszawa : Sciendo, 2019 / Kotwica Krzysztof - ISSN 2545-2843 - ISBN 978-3-11-067479-8 Pages s. 450-459 Number of pages 10 s. Publication form Online - E Action International Conference “Mining Techniques” TUR 2019 /11./ Event date 17.09.2019 - 20.09.2019 VEvent location Krynica Country PL - Poland Event type WRD Language eng - English Country CZ - Czech Republic Keywords erosion ; concrete ; fast flowing liquid ; high-speed water jets ; X-Ray CT Subject RIV JN - Civil Engineering OECD category Civil engineering R&D Projects GA18-25035S GA ČR - Czech Science Foundation (CSF) LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UGN-S - RVO:68145535 DOI 10.2478/ntpe-2019-0048 Annotation 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. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2021 Electronic address https://content.sciendo.com/view/journals/ntpe/2/1/article-p450.xml?product=sciendo
Number of the records: 1