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, https://doi.org/10.1016/j.mineng.2019.106093
Mechanical transformation of phyllite mineralogy toward its use as alkali-activated binder precursor
|Author:||Adesanya, Elijah1; Ohenoja, Katja1; Yliniemi, Juho1;|
1Faculty of Technology, Fiber and Particle Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Finland
|Online Access:||PDF Full Text (PDF, 2.7 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019110636869
|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.
|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
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.
© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).