University of Oulu

Jouni Rissanen, Chiara Giosué, Katja Ohenoja, Paivo Kinnunen, Mirco Marcellini, Maria Letizia Ruello, Francesca Tittarelli, Mirja Illikainen, The effect of peat and wood fly ash on the porosity of mortar, Construction and Building Materials, Volume 223, 2019, Pages 421-430, ISSN 0950-0618,

The effect of peat and wood fly ash on the porosity of mortar

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Author: Rissanen, Jouni1; Giosué, Chiara2; Ohenoja, Katja1;
Organizations: 1Fibre and Particle Engineering, Faculty of Technology, PO Box 4300, 90014, University of Oulu, Finland
2Department of Materials, Environmental Sciences and Urban Planning – SIMAU, Università Politecnica delle Marche, UdR INSTM, 60131 Ancona, Italy
3ISAC-CNR Bologna, Italy
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.8 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2021-07-08


Fluidized bed combustion fly ash (FBCFA), notably different from regular (coal) fly ash, is a promising industrial side stream to be used as a supplementary cementitious material (SCM). Peat and wood are important sources of biomass for energy production in Nordic countries and generate formidable amounts of un-used ash yearly. Two FBCFAs from the co-combustion of peat and wood, fly ash from coal combustion, and limestone filler were used to replace 10 wt%, 20 wt%, and 40 wt% of cement in mortar specimens. The compressive strength, porosity, water absorption, water vapor permeability, and drying shrinkage of the mortars were measured and compared. It was found that in almost all properties FBCFAs outperformed un-reactive limestone filler. Compared to coal fly ash, FBCFAs produced mortars with comparable compressive strength although with higher porosity, water absorption, and water vapor permeability.

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Series: Construction & building materials
ISSN: 0950-0618
ISSN-E: 1879-0526
ISSN-L: 0950-0618
Volume: 223
Pages: 421 - 430
DOI: 10.1016/j.conbuildmat.2019.06.228
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This work is a part of the MINSI project (A70189), which is supported by the European Regional Development Fund (ERDF) and Finnish companies including Fortum Waste Solutions, Pohjolan Voima, Oulun Energia, SSAB, and Stora Enso. Jouni Rissanen gratefully acknowledges the financial support from the Fortum Foundation and Tauno Tönning’s Foundation.
Copyright information: © 2019 The Authors. Published by Elsevier Inc. This manuscript version is made available under the CC-BY-NC-ND 4.0 license