Hydration of Portland cement with high replacement by siliceous fly ash

Deschner F, Winnefeld F, Lothenbach B, Seufert S, Schwesig P, Dittrich S, Götz-Neunhoeffer F, Neubauer J (2012)

Publication Language: English

Publication Type: Journal article

Publication year: 2012

Journal

Publisher: Elsevier

Pages Range: 1389-1400

Journal Issue: 42 (10)

DOI: 10.1016/j.cemconres.2012.06.009

Abstract

The effects of two different low calcium fly ashes on the hydration of ordinary Portland cement (OPC) pastes containing 50 wt.% of fly ash were investigated over a hydration time of 550 days. The results were compared with a reference blend of OPC containing 50 wt.% of inert quartz powder allowing the distinction between "filler effect" and pozzolanic reaction. Until 2 days, no evidence of fly ash reaction was measured and its influence on the hydration is mainly related to the filler effect. From 7 days on, the effects of the pozzolanic reaction were observed by the consumption of portlandite, the change of the pore solution chemistry, the formation of a presumably water-rich inner hydration product and the change of the C-S-H composition towards higher Al/Si ratio compared to the C-S-H of neat OPC. Additional strength due to the pozzolanic reaction developed after 28 days of hydration. © 2012 Elsevier Ltd.

Authors with CRIS profile

Involved external institutions

Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology Switzerland (CH)

How to cite

APA:

Deschner, F., Winnefeld, F., Lothenbach, B., Seufert, S., Schwesig, P., Dittrich, S.,... Neubauer, J. (2012). Hydration of Portland cement with high replacement by siliceous fly ash. Cement and Concrete Research, 42 (10), 1389-1400. https://doi.org/10.1016/j.cemconres.2012.06.009

MLA:

Deschner, Florian, et al. "Hydration of Portland cement with high replacement by siliceous fly ash." Cement and Concrete Research 42 (10) (2012): 1389-1400.

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