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[21940] Artykuł: Effect of chalcedony dust on ASR in mortars of reactive aggregateCzasopismo: Procedia Engineering Tom: 108, Strony: 475-480ISSN: 1877-7058 Wydawca: ELSEVIER SCIENCE BV, SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS Opublikowano: 2015 Seria wydawnicza: Procedia Engineering Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Materiały z konferencji międzynarodowej (zarejestrowane w Web of Science) Punkty MNiSW: 15 Klasyfikacja Web of Science: Proceedings Paper DOI Web of Science Keywords: mineral admixture  chalcedonyl cement mortarl alkali silica reaction  pozzolanic properties  |
Chalcedony dust is a mineral addition which has pozzolanic properties, similar to fly ash. Pozzolanic in nature, chalcedony dust causes the increase of absorption of sodium and potassium ions by the CSH phase of lower C/S molar ratio, decreasing their concentration in the concrete pore solution, thus eliminating the concrete damaging by ASR. The paper presents the characteristics of chalcedony dust and the results from the studies of alkali expansion in cement mortars containing this admixture. Its contribution to reducing expansion was demonstrated in the study, along with the relationship between the amount of the chalcedony dust and the magnitude of expansion resulting from ASR. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/lienses/by-nc-nd/4.0). Peer-review under responsibility of organizing committee of the 7th Scientific-Technical Conference Material Problems in Civil Engineering