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Evaluation of self-healing in concrete by means of analytical techniques
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SYSNO ASEP 0532113 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Evaluation of self-healing in concrete by means of analytical techniques Author(s) Aspiotis, K. (GR)
Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Kumpová, Ivana (UTAM-F) RID, SAI, ORCID
Mácová, Petra (UTAM-F) RID, SAI, ORCID
Badogiannis, E. (GR)
Tsivilis, S. (GR)Number of authors 6 Source Title Solid State Phenomena, 26th International Conference Concrete Days, 309. - Baech : Trans Tech Publications, 2020 / Nenadálová Š. ; Johová P. - ISSN 1012-0394 - ISBN 978-3-0357-1668-9 Pages s. 38-43 Number of pages 6 s. Publication form Print - P Action International Conference Concrete Days /26./ Event date 20.11.2019 - 21.11.2019 VEvent location Hradec Králové Country CZ - Czech Republic Event type EUR Language eng - English Country CH - Switzerland Keywords self-healing ; concrete ; chemical additives ; Raman spectroscopy ; X-ray tomography Subject RIV JM - Building Engineering OECD category Construction engineering, Municipal and structural engineering Method of publishing Limited access Institutional support UTAM-F - RVO:68378297 EID SCOPUS 85090285306 DOI 10.4028/www.scientific.net/SSP.309.38 Annotation In the present work, the self-healing process in concrete was evaluated using analytical techniques. For this purpose, two concrete mixes of different composition (one used as control) were prepared with a water-to-binder ratio of 0.45. The self-healing process was triggered by the introduction in the concrete mix of a commercial expansive admixture (calcium sulfo-aluminate), two dicarboxylic acids, and sodium carbonate salt. After 28 days curing in water, the specimens were artificially cracked (crack width ≤ 900 μm) and then again water-cured for further 60 days until selfhealing occurred. The progress of self-healing was investigated with a stereomicroscope at 40, 50, and 60 days, after cracking, to identify the quality and the degree of the healing. The efficiency of the self-healing process was also evaluated using micro-Raman spectroscopy and X-ray micro-computed tomography. Significant reduction in the crack width was observed as a result of a calcite filling, generated during the self-healing process. In some cases (crack width < 400 μm), the crack was completely healed. The experimental methodology used provided new insights into the evolution of the self-healing phenomenon in concrete. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2021 Electronic address https://doi.org/10.4028/www.scientific.net/SSP.309.38
Number of the records: 1