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Super-robust superhydrophobic concrete

Song, J; Zhao, D; Han, Z; Xu, W; Lu, Y; Liu, X; Liu, B; ... Parkin, IP; + view all (2017) Super-robust superhydrophobic concrete. Journal of Materials Chemistry A , 5 (28) pp. 14542-14550. 10.1039/c7ta03526h. Green open access

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Steel reinforced concrete is often used in buildings, roads and bridges, however, freeze–thaw damage and steel corrosion pose threats to the strength of concrete. Furthermore, ice formation on concrete road-surfaces greatly increases injury and fatality rates. Superhydrophobic materials are promising candidates to alleviate these problems due to their anti-corrosion and anti-icing properties. However, the weak mechanical robustness of superhydrophobic surfaces makes them difficult to apply to concrete surfaces. Here we report a facile route to fabricate superhydrophobic concrete (S-concrete) via metal mesh covering and fluoroalkylsilane modification. Comparative robustness tests, including sandpaper abrasion, knife scratch and hammer beat, were performed on commercial superhydrophobic paint + adhesive coatings and our S-concrete, which indicated that our S-concrete had far superior surface mechanical durability. To illustrate the practical prospects, we performed further tests on the S-concrete, including artificial cold rain, freeze–thaw, and corrosion under applied voltage in corrosive solution. The S-concrete showed remarkable anti-icing, anti-freeze–thaw, and anti-corrosion properties, and mechanical robustness.

Type: Article
Title: Super-robust superhydrophobic concrete
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c7ta03526h
Publisher version: http://doi.org/10.1039/c7ta03526h
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Technology, Chemistry, Physical, Energy & Fuels, Materials Science, Multidisciplinary, Chemistry, Materials Science, OIL-WATER SEPARATION, ALUMINUM-ALLOY, SURFACES, COATINGS, PERFORMANCE, FABRICATION, DURABILITY, STRENGTH, STEEL, METAKAOLIN
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1561722
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