One-part geopolymer cement from slag and pretreated paper sludge |
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Author: | Adesanya, Elijah1; Ohenoja, Katja1; Luukkonen, Tero1; |
Organizations: |
1Faculty of Technology, Fiber and Particle Engineering Unit, University of Oulu 2Department of Civil and Environmental Engineering, Imperial College London |
Format: | article |
Version: | published version |
Access: | open |
Online Access: | PDF Full Text (PDF, 1.6 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe201803206097 |
Language: | English |
Published: |
Elsevier,
2018
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Publish Date: | 2018-03-20 |
Description: |
AbstractThe aim of this study was the valorization of paper sludge waste from paper industry in designing one-part geopolymer cement using ground granulated blast furnace slag as main precursor. The effects of increasing the amount of paper sludge pretreated with a constant amount of sodium hydroxide (2% of slag) on mechanical strength, heat evolution, setting time and durability were analyzed. The reaction products were characterized using X-ray diffraction and thermogravimetric analysis. The findings showed that paper sludge can successfully be used as a secondary source of calcium carbonate in the one-part (“just add water”) geopolymer. The compressive strength of the cured geopolymer increased with increasing the amount of paper sludge, and the non-reacted sludge acted as a filler. The maximum strength (42 MPa, 28 d) was reached at 18 wt-% paper sludge addition. The main reaction products were calcium aluminate silicate hydrate and hydrotalcite-like cementitious gels. From the perspective of its blast-furnace slag content, strength properties, water absorption and setting time, the one-part geopolymer cement could be classified as a CEM IIIC and Type 32.5N class cement under the European standard EN-197. see all
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Series: |
Journal of cleaner production |
ISSN: | 0959-6526 |
ISSN-E: | 1879-1786 |
ISSN-L: | 0959-6526 |
Volume: | 185 |
Pages: | 168 - 175 |
DOI: | 10.1016/j.jclepro.2018.03.007 |
OADOI: | https://oadoi.org/10.1016/j.jclepro.2018.03.007 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
216 Materials engineering 218 Environmental engineering 212 Civil and construction engineering |
Subjects: | |
Funding: |
The research was funded by the European Regional Development Fund (A70189) under the auspices of the MINSI project and the following companies: SSAB Europe Oy, Ekokem Oy, Stora Enso Oy, Pohjolan Voima Oy and Oulun Energia. |
Copyright information: |
© 2018 The Authors. Published by Elsevier Ltd. Open Access funded by the author(s). Under a Creative Commons license. |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |