Resumo

CRUZ-MORENO, D. et al. Surface treatment with silicon-based nanoparticles induced during curing: Effect on durability of portland cement based materials. Rev. ALCONPAT [online]. 2017, vol.7, n.3, pp.274-285. ISSN 2007-6835.  https://doi.org/10.21041/ra.v7i3.239.

The effect of the introduction of silicon-based nanoparticles (NBS) prepared by the sol-gel method was studied. The introduction of NBS was induced for 72 hours during curing by using mortar specimens with a w/c ratio of 0.65 and a suspension prepared at [NBS] = 0.1% with respect to the volume of the curing water. Subsequently, the samples followed a period of immersion in potable water to promote the reaction of NBS inside mortar. Frequent measurements of electrical resistivity were made. Subsequently, a series of specimens were exposed in environments rich in Cl- or CO2. The results indicated a decrease in the penetration of aggressive agents into the mortar specimens. This coincides with increasing resistivity specimens treated with respect to the reference.

Palavras-chave : Durability; surface treatment; nanoparticles; curing; permeability.

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