Počet záznamů: 1
Influence of additions of synthetic anhydrous calcium carbonate polymorphs on nanolime carbonation
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SYSNO ASEP 0508048 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Influence of additions of synthetic anhydrous calcium carbonate polymorphs on nanolime carbonation Tvůrce(i) Ševčík, Radek (UTAM-F) RID, SAI, ORCID
Mácová, Petra (UTAM-F) RID, SAI, ORCID
Pérez Estébanez, M. (ES)
Viani, Alberto (UTAM-F) RID, ORCID, SAICelkový počet autorů 4 Číslo článku UNSP 116802 Zdroj.dok. Construction and Building Materials. - : Elsevier - ISSN 0950-0618
Roč. 228, December (2019)Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova nanolime ; calcium carbonate CaCO3 ; Ca(OH)2 ; carbonation ; polymorphs Vědní obor RIV CA - Anorganická chemie Obor OECD Materials engineering CEP GA17-05030S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UTAM-F - RVO:68378297 UT WOS 000497886100098 EID SCOPUS 85071638997 DOI 10.1016/j.conbuildmat.2019.116802 Anotace The influence of synthetic anhydrous calcium carbonate polymorphs, calcite, vaterite and aragonite, on carbonation of nanolime suspension, has been investigated. The higher rates of carbonation observed after 7 days in mixtures containing vaterite and aragonite particles, found explanation in the control exerted by heterogeneous nucleation on the water-mediated reaction mechanism and in the enhanced carbon dioxide diffusivity in the sample volume, both facilitated by the higher specific surface of the powders and the microporous sample fabric. Introduction of synthetic calcium carbonate allowed for exerting control on formed polymorphs, subverting the order of their (meta-)stability. The peculiar microstructure obtained by adding aragonite rod-like particles, mitigates the propagation of desiccation cracks (which impair continuity of the carbonated nanolime film). The mechanism, although still not completely understood, likely involves the regulation of evaporation of liquid fraction and redistribution of the tensional stresses during drying and nanolime crystallization. The obtained results provide new insights into the crystallization of carbonates from nanolime particles and may help in the design of innovative compatible products for consolidation of lime-based materials and carbon dioxide sequestration. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2020 Elektronická adresa https://doi.org/10.1016/j.conbuildmat.2019.116802
Počet záznamů: 1