University of Oulu

Lemougna, P. N., Adediran, A., Yliniemi, J., Luukkonen, T., & Illikainen, M. (2021). Effect of organic resin in glass wool waste and curing temperature on the synthesis and properties of alkali-activated pastes. Materials & Design, 212, 110287.

Effect of organic resin in glass wool waste and curing temperature on the synthesis and properties of alkali-activated pastes

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Author: Lemougna, Patrick N.1,2; Adediran, Adeolu1; Yliniemi, Juho1;
Organizations: 1Faculty of Technology, Fibre and Particle Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Oulu, Finland
2Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.7 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2021-12-01


This study investigated the effect of organic resin contained in glass wool on synthesis of alkali-activated binders. The study was performed on glass wool containing sugar or phenolic resin, comparing it with glass wool that did not contain resin, as a reference. The results showed that the organic resin could be qualitatively identified using Fourier-transform infrared spectroscopy (FTIR) and thermo gravimetry-mass spectrometer (TG-MS), with gradual decomposition occurring between 200°C and 550°C. The presence of organic resin reduced the milling efficiency of glass wool, modified the rheology by increasing the liquid demand, and slowed the strength development at room temperature. However, interestingly, the effect of the resin on the strength of the paste was less obvious at an age of 28 days. Curing for 24 h at 40°C was beneficial for one-day strength development, in comparison to 20°C and 60°C, independent of the presence of the resin. All the cured paste samples, with and without resin, achieved a compressive strength of more than 40 MPa at 28 days, satisfying the requirement for many structural applications. Nevertheless, water immersion affected the materials’ strength, suggesting their suitability for dry environments or the need for suitable co-binders to increase their durability and water resistance.

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Series: Materials & design
ISSN: 0264-1275
ISSN-E: 1873-4197
ISSN-L: 0264-1275
Volume: 121
Article number: 110287
DOI: 10.1016/j.matdes.2021.110287
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
216 Materials engineering
Funding: This work was performed in the framework of WOOL2LOOP H2020 project grant #821000. A substantial part of the experimental work was performed by Anne Heikkila in the framework of her master’s thesis. Adeolu Adediran received funding from Auramo-säätiö for his doctoral research. Tero Luukkonen and Juho Yliniemi received funding from the Academy of Finland (grant #326291 and #322786, respectively). Part of the work was carried out with the support of the Centre for Material Analysis, University of Oulu, Finland. The authors thank Permakem AS for generously supplying the sodium silicate solution used in this investigation.
EU Grant Number: (821000) WOOL2LOOP - Mineral wool waste back to loop with advanced sorting, pre-treatment, and alkali activation
Academy of Finland Grant Number: 326291
Detailed Information: 326291 (Academy of Finland Funding decision)
322786 (Academy of Finland Funding decision)
Copyright information: © 2021 The Authors. Published by Elsevier Ltd. Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).