University of Oulu

Hoang Nguyen, Alexandra Kaas, Paivo Kinnunen, Valter Carvelli, Carol Monticelli, Juho Yliniemi, Mirja Illikainen, Fiber reinforced alkali-activated stone wool composites fabricated by hot-pressing technique, Materials & Design, Volume 186, 2020, 108315, ISSN 0264-1275,

Fiber reinforced alkali-activated stone wool composites fabricated by hot-pressing technique

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Author: Nguyen, Hoang1; Kaas, Alexandra2; Kinnunen, Paivo1;
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, Pentti Kaiteran Katu 1, 90014, Oulu, Finland
2Institute of Mechanical Process Engineering and Mineral Processing, Technical University Bergakademie Freiberg, Agricolastraße 1, 09599, Freiberg, Germany
3Department A.B.C., Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133, Milan, Italy
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.6 MB)
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Language: English
Published: Elsevier, 2020
Publish Date: 2019-11-22


Cementitious composite that has short molding time and high mechanical performance is favorable in pre-cast concrete industry. In this context, this study reports the use of hot-pressing technique to fabricate PVA fiber reinforced composites using alkali-activated stone wool (a waste from building insulation). Eight different mixtures were developed by varying the pressing time and temperature in comparison to the conventional oven-cured alkali-activated material. The mechanical performance of all compositions was evaluated under bending and compressive loadings. Life cycle assessment was used to investigate the greenhouse gas emission and embodied energy of the developed composites. The results reveal that PVA fibers greatly enhanced the mechanical performance of all reinforced mixtures with deflection hardening behavior and improvement in compressive strength. The hot-pressing technique lowered CO₂ emission and saved energy. Finally, a multi-criteria ranking method suggests hot-pressed PVA fiber reinforced cementitious composite, manufactured at 120 °C for 2 h, is the best composition attaining balance among energy spent, mechanical properties, and CO₂ footprint.

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Series: Materials & design
ISSN: 0264-1275
ISSN-E: 1873-4197
ISSN-L: 0264-1275
Volume: 186
Article number: 108315
DOI: 10.1016/j.matdes.2019.108315
Type of Publication: A1 Journal article – refereed
Field of Science: 212 Civil and construction engineering
216 Materials engineering
Funding: This work was done under: - GEODESIGN (project number: 1215/31/2015) funded by Business Finland and companies Boliden Harjavalta Oy, Destaclean Oy, Fortum Power and Heat Oy, Paroc Group Oy, Saint-Gobain Finland Oy, and Suomen Erityisjäte Oy. - FLOW (project number: 8904/31/2017) project funded by Business Finland in the ERA-MIN 2 Innovation program, which is part of the EU Horizon 2020 program.
Copyright information: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (