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Super-robust superhydrophobic concrete

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Abstract

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.

Graphical abstract: Super-robust superhydrophobic concrete

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Publication details

The article was received on 24 Apr 2017, accepted on 05 Jun 2017 and first published on 05 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA03526H
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Super-robust superhydrophobic concrete

    J. Song, D. Zhao, Z. Han, W. Xu, Y. Lu, X. Liu, B. Liu, C. J. Carmalt, X. Deng and I. P. Parkin, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA03526H

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