Hussein, OH, Bernal, SA, Ha, J-H et al. (1 more author) (2017) Bubble stabilisation improves strength of lightweight mortars. Proceedings of the Institution of Civil Engineers - Construction Materials, 170 (3). pp. 134-140. ISSN 1747-650X
Abstract
Lightweight foamed mortars are produced through the addition of foaming agents into the cement blend, so that voids of different sizes are formed within the matrix, reducing the density of the material and therefore also its weight. However, the increased porosity of these materials usually compromises their mechanical strength, limiting their application as a structural material. Modern infrastructure demands high-strength lightweight concrete formulations that can be adjusted to develop more ambitious projects, both in design and application. In this study, lightweight pastes and mortars were produced using Portland cement blended with fly ash and silica fume, with varying water contents, and foamed using aluminium metal powder. To stabilise the bubbles produced through oxidation of the aluminium metal, polyethylene glycol was added to the mixes, and proved effective in yielding more uniform bubbles than were observed in the samples with no added stabiliser. This led to improvements in both the bulk density and compressive strength of the materials produced according to this new methodology.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © ICE Publishing: All rights reserved. This is an author produced version of a paper published in Proceedings of the Institution of Civil Engineers - Construction Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | concrete technology & manufacture; materials technology; strength and testing of materials |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Sep 2018 14:20 |
Last Modified: | 02 Oct 2018 08:29 |
Status: | Published |
Publisher: | ICE Publishing |
Identification Number: | 10.1680/jcoma.15.00001 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:135517 |