University of Oulu

Elijah Adesanya, Katja Ohenoja, Juho Yliniemi, Mirja Illikainen, Mechanical transformation of phyllite mineralogy toward its use as alkali-activated binder precursor, Minerals Engineering, Volume 145, 2020, 106093, ISSN 0892-6875,

Mechanical transformation of phyllite mineralogy toward its use as alkali-activated binder precursor

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Author: Adesanya, Elijah1; Ohenoja, Katja1; Yliniemi, Juho1;
Organizations: 1Faculty of Technology, Fiber and Particle Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.7 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2019-11-06


The mechanical activation of phyllite for use as an alkali-activated material was studied. Prolonged milling of phyllite resulted in reduced particle size and a structural reorganization of the material, leading to incremental increases in amorphous content, which further resulted in the improved reactivity of phyllite in an alkaline environment. Quantitative X-ray diffraction results showed that the phyllite consisted of quartz, muscovite, chamosite, albite, and X-ray amorphous phases. Among the crystalline phases, muscovite and chamosite underwent the most structural reorganization, leading to a more disordered structure due to prolonged and intensive milling. The structural reorganization was also established through Fourier-transform infrared spectroscopy. Dissolution tests in 6 M NaOH showed incremental increases in leached Al and Si elements with increased milling time. After geopolymerization of mechanically activated phyllite, calorimetric studies showed exothermic reactions, and a 28-day compressive strength of 25 MPa was achieved for paste samples cured at room temperature. This study ascertained the potential utilization of phyllite mineral waste in sustainable cement applications.

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Series: Minerals engineering
ISSN: 0892-6875
ISSN-E: 1872-9444
ISSN-L: 0892-6875
Volume: 145
Article number: 106093
DOI: 10.1016/j.mineng.2019.106093
Type of Publication: A1 Journal article – refereed
Field of Science: 1172 Environmental sciences
212 Civil and construction engineering
214 Mechanical engineering
216 Materials engineering
218 Environmental engineering
Funding: This work was conducted under the auspices of the ARCTIC-ecocrete project (NYPS 20201459), which is supported by the Interreg Nord EU program and the Regional Council of Lapland.
Copyright information: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (