Resumo

VACA-ARCIGA, L. et al. Use of nano-SiO₂ as a preventive maintenance surface treatment in concrete aged by carbonation. Rev. ALCONPAT [online]. 2020, vol.10, n.3, pp.274-285.  Epub 06-Jun-2022. ISSN 2007-6835.  https://doi.org/10.21041/ra.v10i3.487.

This study aims to evaluate the use of silicon base (NS) and functionalized (NF) nanoparticles as emerging preventive surface treatment (ST) in reinforced concrete specimens. The specimens were fabricated with a water/cement (w/c) of 0.65 and subjected to a previous aging period through exposure to CO2. Subsequently, two different variants of the treatment were applied by spraying (using a 0.1% dispersion of nanoparticles in water) and then re-applied to carbonation. The carbonation depth and contact angle results indicate that there is an influence between the degree of aging and the efficiency of each treatment.

Palavras-chave : surface treatment; prevention; Nano SiO₂; concrete; carbonation.

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