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Durability assessment of self-healing in ordinary Portland cement concrete containing chemical additives
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SYSNO ASEP 0545398 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Durability assessment of self-healing in ordinary Portland cement concrete containing chemical additives Author(s) Aspiotis, K. (GR)
Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Ntaska, A. (GR)
Mácová, Petra (UTAM-F) RID, SAI, ORCID
Badogiannis, E. (GR)
Tsivilis, S. (GR)Number of authors 6 Article number 124754 Source Title Construction and Building Materials. - : Elsevier - ISSN 0950-0618
Roč. 305, October (2021)Number of pages 14 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords self-healing ; concrete ; chemical additives ; water retarders ; dicarboxylic acids ; durability OECD category Materials engineering Method of publishing Limited access Institutional support UTAM-F - RVO:68378297 UT WOS 000696989300004 EID SCOPUS 85114621791 DOI https://doi.org/10.1016/j.conbuildmat.2021.124754 Annotation The self-healing effect of several combinations of different additives (dicarboxylic acids, sodium carbonate, expansive additive, silica fume, fibers) incorporated in artificially cracked concrete specimens, was investigated. Their effectiveness was assessed through stereomicroscopic observations and durability tests. The structure and chemistry of the healing products were characterized with optical microscopy and Raman spectroscopy. The additives ensured closing crack widths up to 400 μm. The combination dicarboxylic acids/expansive additive performs best by preserving unreacted clinker grains that may hydrate at later stages. Carbonation of portlandite led to calcite precipitation either in bulk (using fibers as nucleation sites) or on the cracks’ surface. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2022 Electronic address https://doi.org/10.1016/j.conbuildmat.2021.124754
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