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Durham Research Online
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The fire resistance of high-strength concrete containing natural zeolites

Kushnir, Alexandra R.L. and Heap, Michael J. and Griffiths, Luke and Wadsworth, Fabian B. and Langella, Alessio and Baud, Patrick and Reuschlé, Thierry and Kendrick, Jackie E. and Utley, James E.P. (2021) 'The fire resistance of high-strength concrete containing natural zeolites.', Cement and Concrete Composites, 116 .

Abstract

More sustainable and environmentally friendly concretes are essential to reduce the climatic and environmental impact of the growing demand for concrete to fuel urban sprawl. This manuscript reports on an experimental study designed to test the fire resistance of one such concrete, prepared to contain natural zeolite-bearing tuff. The fire resistance of concretes containing natural zeolites has received little attention and is therefore poorly understood. Relative reductions in residual uniaxial compressive strength as a function of increasing temperature (up to 1000 °C) were very similar for the reference concrete (containing no tuff) and the tuff-bearing concrete. These data can be explained by the similar influence of high-temperature on the chemical (dehydroxylation reactions) and physical (microcracking and porosity) properties of both concretes. The satisfactory performance of the concrete containing natural zeolites following fire is welcome owing to the economic, climatic, and environmental benefits of using natural pozzolan and aggregate substitutes.

Item Type:Article
Full text:(AM) Accepted Manuscript
Available under License - Creative Commons Attribution Non-commercial No Derivatives 4.0.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1016/j.cemconcomp.2020.103897
Publisher statement:© 2021 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Date accepted:09 December 2020
Date deposited:04 January 2021
Date of first online publication:15 December 2020
Date first made open access:15 December 2021

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