Abstract

ZANON, T.; SCHMALZ, R.  and  FERREIRA, F. G. S.. Evaluation of nanosilica effects on concrete submitted to chloride ions attack. Rev. ALCONPAT [online]. 2018, vol.8, n.2, pp.138-149.  Epub Aug 28, 2020. ISSN 2007-6835.  https://doi.org/10.21041/ra.v8i2.274.

The present paper studied the influence of nanosilica dispersed on superplasticizer, and its combined effect with silica fume, on different concrete properties. Compressive strength, tensile strength by diametrical compression and water absorption by capillarity tests, as well as accelerated durability tests against chloride ions were carried out. Results indicated that isolated nanosilica addition (0.1 to 0.5%) did not improve concretes in any tests performed. However, for 0.5 and 0.7% content of nanosilica combined with 10% of silica fume, there was an increase in compressive strength, reduction of capillary absorption and reduction of chlorides penetration.

Keywords : concrete; chloride ions; nanoparticles; nanosilica.

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