Bernal, S.A., Bejarano, J., Garzon, C. et al. (3 more authors) (2012) Performance of refractory aluminosilicate particle/fiber-reinforced geopolymer composites. Composites Part B: Engineering, 43 (4). 1919 - 1928. ISSN 1359-8368
Abstract
This study assesses the mechanical performance of metakaolin-based geopolymers reinforced with refractory aluminosilicate particles and fibers, after exposure to elevated temperatures. Compressive strength, shrinkage and flexural strength data reveal that the inclusion of refractory particles, both with and without additional refractory fibers, promotes improved post-exposure compressive and flexural strengths compared with samples without reinforcement. Specimens exposed to temperatures between 600 °C and 1000 °C exhibited reduced shrinkage with the inclusion of higher contents of particles and fibers, while retaining good mechanical strength. This behavior is attributed to the cracking control achieved in these materials, which contributes to the enhancement of their volumetric stability through the combined effect of a strong interaction between reinforcing particles and the matrix leading to crack deflection, and the potential densification of the matrix–fiber interface at increased exposure temperatures, rising the stiffness of the final composite. These results indicate that metakaolin-based geopolymer composites, if designed with the correct compatibility between matrix and filler characteristics, can act as an inexpensive castable composite refractory.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2012 Elsevier. This is an author produced version of a paper subsequently published in Composites Part B: Engineering. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | A. Particle reinforcement; A. Fibers; D. Mechanical testing; B. High-temperature properties; Geopolymer |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 Oct 2015 15:50 |
Last Modified: | 03 Nov 2016 09:29 |
Published Version: | https://doi.org/10.1016/j.compositesb.2012.02.027 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.compositesb.2012.02.027 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:86436 |