University of Oulu

Jouni Rissanen, Katja Ohenoja, Paivo Kinnunen, Marcello Romagnoli, Mirja Illikainen, Milling of peat-wood fly ash: Effect on water demand of mortar and rheology of cement paste, Construction and Building Materials, Volume 180, 2018, Pages 143-153, ISSN 0950-0618, https://doi.org/10.1016/j.conbuildmat.2018.05.014

Milling of peat-wood fly ash : effect on water demand of mortar and rheology of cement paste

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Author: Rissanen, Jouni1; Ohenoja, Katja1; Kinnunen, Paivo1;
Organizations: 1Fibre and Particle Engineering, Faculty of Technology, PO Box 4300, 90014, University of Oulu, Finland
2DIEF – Università di Modena e Reggio Emilia, Via Vivarelli 10, 41125 Modena, Italy
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019121848818
Language: English
Published: Elsevier, 2018
Publish Date: 2020-06-05
Description:

Abstract

The milling of fluidized bed combustion fly ashes is a promising method to improve ashes’ properties as a cement replacement material. Two fly ashes from the co-combustion of peat and wood, as well as inert sand were milled at varying times. The physical properties of materials, water demand of mortar and rheology of cement paste were studied. At 25% cement replacement rate, the milling decreased the water demand of mortar by 10% and the yield stress of cement paste by 33%. It was found that milling disintegrated irregularly shaped particles, which were the main reason for high water demand of ashes, and tapped density could be used as a simple parameter to estimate the water demand for all studied materials.

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Series: Construction & building materials
ISSN: 0950-0618
ISSN-E: 1879-0526
ISSN-L: 0950-0618
Volume: 180
Pages: 143 - 153
DOI: 10.1016/j.conbuildmat.2018.05.014
OADOI: https://oadoi.org/10.1016/j.conbuildmat.2018.05.014
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
216 Materials engineering
Subjects:
Funding: This work was done under the auspices of the “MINSI” project, which is supported by the European Regional Development Fund (ERDF), and various companies including Fortum Waste Solutions, Pohjolan Voima, Oulun Energia, SSAB, and Stora Enso.
Copyright information: © 2018 The Authors. Published by Elsevier Inc. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
  https://creativecommons.org/licenses/by-nc-nd/4.0/