Comparative Study of the Effects of Microsilica and Nanosilica in Concrete

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State-of-the-art report on use of nano-materials in concrete (2014, background): “Mondal et al. (2010) found that the addition of certain nano-materials such as nano-SiO2 can significantly improve the durability of concrete.”
SCC modification by use of amorphous nano-silica (2014, background): “Nanoindentation studies proved that the elastic moduli of the two types of C–S–H phases (low and high stiffness type) did not change with the addition of nano-silica [67].”
Influence of SiO2, TiO2 and Fe2O3 nanoparticles on the properties of fly ash blended cement mortars (2020, background): “Nanoparticles can also fill up the pores in the C-S-H gel structure, resulting in a more closely packed structure of hydration products with higher stiffness [47].”
Beneficial role of nanosilica in cement based materials – A review (2013, methodology): “From nanoindentation technique it is observed that nanosilica addition to the cement paste improved the modulus of elasticity and hardness [60].”