Effects of GO/Al<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub> Nanoparticles on Concrete Durability against High Temperature, Freeze‐Thaw Cycles, and Acidic Environments
Mehdi Saliani, Amin Honarbakhsh, Rahele Zhiani, Seyed Mojtaba Movahedifar, Alireza Motavalizadehkakhky
Abstract
In this paper, the effect of GO/Al 2 O 3 and Al 2 O 3 synthesized nanoparticles on the durability of concrete is studied. To this end, after the synthesis of nanoparticles and confirmation of nanoparticles fabrication by SEM and FT‐IR spectra, three concrete samples for each experiment related to each mix design were prepared and subjected to freeze‐thaw cycles, high temperature, and acidic environment. The results show that the samples containing GO/Al 2 O 3 nanoparticles had the least weight loss in freeze‐thaw cycles as well as better resistance against acidic environment and the lowest apparent changes at high temperature compared to the samples containing nano‐Al 2 O 3 and the samples without nanoparticles. The replacement of 2 wt.% of cement with GO/Al 2 O 3 nanoparticles results in the highest increase in concrete durability. The presence of nanoparticles in the concrete microstructure and the validation of the results are investigated by FT‐IR, SEM, and EDX spectra.