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Preliminary study of the pozzolanic activity of dumped mine wastes obtained from the North Bohemian Basin in the Czech Republic
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SYSNO ASEP 0473598 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Preliminary study of the pozzolanic activity of dumped mine wastes obtained from the North Bohemian Basin in the Czech Republic Author(s) Sotiriadis, Konstantinos (UTAM-F) RID, ORCID, SAI
Šašek, Petr (UTAM-F) RID, ORCID, SAI
Ševčík, Radek (UTAM-F) RID, SAI, ORCID
Schmidt, P. (CZ)
Řehoř, M. (CZ)
Viani, Alberto (UTAM-F) RID, ORCID, SAINumber of authors 6 Source Title Materials Science - ISSN 1392-1320
Roč. 23, č. 1 (2017), s. 64-69Number of pages 6 s. Publication form Print - P Language eng - English Country LT - Lithuania Keywords pozzolanic activity ; dumped mine wastes ; lime mortars ; thermal analysis Subject RIV JJ - Other Materials OECD category Materials engineering R&D Projects LO1219 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) UT WOS 000396589700012 EID SCOPUS 85012042751 DOI 10.5755/j01.ms.23.1.14864 Annotation Three dumped raw materials, a tuff and two bentonites, obtained from two mining sites at the North Bohemian basin in the Czech Republic, have been studied in order to evaluate them as pozzolanic admixtures in lime mortars for employment in restoration of cultural heritage objects. After thermal activation (800 °C, 5 h), their pozzolanic properties were compared with those of commercial metakaolin. Quantitative phase analysis with the Rietveld method from X-ray powder diffraction patterns, morphological observations, as well as the Frattini and the modified Chapelle tests were performed. In addition, lime mortars, incorporating the fired materials, were prepared and subjected to simultaneous thermal analysis after a 28-day initial curing (20 ± 1 °C, 60 ± 5 % RH). The results showed that all three materials possess pozzolanic activity. However, when employed in lime mortars they did not result in formation of pozzolanic reaction products. Two methods were proposed to improve their reactivity, grinding to obtain finer particle size and removal of quartz content where necessary. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2018 Electronic address https://www.exeley.com/materials_science/doi/10.5755/j01.ms.23.1.14864
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