@article{Sanjuán_Argiz_Gálvez_Reyes_2018, title={Combined effect of nano-SiO2 and nano-Fe2O3 on compressive strength, flexural strength, porosity and electrical resistivity in cement mortars}, volume={68}, url={https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2211}, DOI={10.3989/mc.2018.10716}, abstractNote={The compressive strength, flexural strength, porosity and electrical resistivity properties of cement mortars with nano-Fe<sub>2</sub>O<sub>3</sub> and nano-SiO<sub>2</sub> are studied. Amorphous silica is the main component of pozzolanic materials due to its reaction with calcium hydroxide formed from calcium silicate (C<sub>3</sub>S and C<sub>2</sub>S) hydration. The pozzolanic reaction rate is not only proportional to the amount of amorphous silica but also to the surface area available for reaction. Subsequently, fine nano-Fe<sub>2</sub>O<sub>3</sub> and nano-SiO<sub>2</sub> particles in mortars are expected to improve mortar performance. The experimental results showed that the compressive strength of mortars with nano-Fe<sub>2</sub>O<sub>3</sub> and nano-SiO<sub>2</sub> particles were lower than those obtained with the reference mortar at seven and 28 days. It was shown that the nano-particles were not able to enhance mechanical strength on every occasion. The continuous microstructural progress monitored by mercury intrusion porosimetry (MIP) measurements, pore-size distribution (PSD), total porosity and critical pore diameter also confirmed such results.}, number={329}, journal={Materiales de Construcción}, author={Sanjuán, M. A. and Argiz, C. and Gálvez, J. C. and Reyes, E.}, year={2018}, month={Mar.}, pages={e150} }