Počet záznamů: 1
Role of the morphology and the dehydroxylation of metakaolins on geopolymerization
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SYSNO ASEP 0357802 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Role of the morphology and the dehydroxylation of metakaolins on geopolymerization Tvůrce(i) Medri, V. (IT)
Fabbri, S. (IT)
Dědeček, Jiří (UFCH-W) RID, ORCID
Sobalík, Zdeněk (UFCH-W) RID
Tvarůžková, Zdenka (UFCH-W) RID
Vaccari, A. (IT)Zdroj.dok. Applied Clay Science. - : Elsevier - ISSN 0169-1317
Roč. 50, č. 4 (2010), s. 538-545Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova metakaolin ; geopolymerization ; microstructure Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000285856400014 EID SCOPUS 78649446231 DOI 10.1016/j.clay.2010.10.010 Anotace Two commercial metakaolins were tested during partial geopolymerization with potassium silicate in order to emphasize the different surface reactivities. Both manual and short-term mechanical stirring were used for slurry preparation while radiation. Infrared and microwave heating were used for curing. The metakaolins had similar compositions and specific surface areas but different morphologies and dehydroxylation degrees due to different calcination kiln technologies. The degree of geopolymerization was checked by SEM and N-2 adsorption (BET) FTIR and Al-27 MAS NMR spectroscopy. While the dehydroxylation degrees were different the metakaolins had similar reactivity. The metakaolin powder with rounded agglomerates and lower water demand was more sensitive to the various geopolymerization conditions than the fine dispersed lamellar one thus giving rise to very different micro- and macrostructures of the partially geopolymerized samples. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2011
Počet záznamů: 1