Počet záznamů: 1
Monitoring durability of limestone cement paste stored at conditions promoting thaumasite formation
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SYSNO ASEP 0535250 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Monitoring durability of limestone cement paste stored at conditions promoting thaumasite formation Tvůrce(i) Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Hlobil, Michal (UTAM-F) RID, SAI, ORCID
Toušek, J. (CZ)
Machová, Dita (UTAM-F) RID, ORCID, SAI
Mácová, Petra (UTAM-F) RID, SAI, ORCID
Vopálenský, Michal (UTAM-F) RID, ORCID, SAI
Viani, Alberto (UTAM-F) RID, ORCID, SAICelkový počet autorů 7 Zdroj.dok. Current topics and trends on durability of building materials and components. Proceedings of the XV edition of the international conference on durability of building materials and components (DBMC 2020). - Barcelona : International Center for Numerical Methods in Engineering (CIMNE), 2020 / Serrat C. ; Casas J. R. ; Gibert V. - ISBN 978-84-121101-8-0 Rozsah stran s. 1039-1046 Poč.str. 8 s. Forma vydání Online - E Akce International Conference on Durability of Building Materials and Components (DBMC 2020) Datum konání 20.10.2020 - 23.10.2020 Místo konání Barcelona Země ES - Španělsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. ES - Španělsko Klíč. slova limestone cement ; thaumasite sulfate attack ; microstructure ; solid state NMR spectroscopy ; X-Ray micro-computed tomography Vědní obor RIV JN - Stavebnictví Obor OECD Materials engineering CEP GJ18-26056Y GA ČR - Grantová agentura ČR Institucionální podpora UTAM-F - RVO:68378297 EID SCOPUS 85125815064 DOI 10.23967/dbmc.2020.098 Anotace The durability of Portland-limestone cement withhigh limestone content was monitored at conditions promoting thaumasite formation. Pore structure and deterioration characteristics were assessed with X-ray micro-computed tomography and correlatedwith material’s strength. Changes in crystalline and amorphous phasesof the cement paste were investigated with X-ray powder diffractionand solid state nuclear magnetic resonance spectroscopy. Rapid deterioration was observed, evolving as a front causingconcentric crack patterns followed by detachment of the part of specimen in contactwith the corrosive solution. Thisultimately led to loss of structural integrity after 4monthsofexposure.During sulfate attack, thaumasite, ettringite and gypsum formed at the expense of portlandite, calcite and monocarboaluminate hydrate. Furthermore, polymerization of silicate chains in C-S-H and deterioration of C-S-H also occurred. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2021 Elektronická adresa https://doi.org/10.23967/dbmc.2020.098
Počet záznamů: 1