A comparative study on the pozzolanic activity between nano-SiO2 and silica fume

By Y. Qing, Zhang Zenan, Shengfei Li, Rongshen Chen. 2006

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Review on concrete nanotechnology (2016, background): “Some authors, such as Bahadori and Hosseini (2012), Berra, Carassiti, Mangialardi, Paolini, and Sebastiani (2012) and Qing et al. (2006), obtained a remarkable reduction of the mixes workability when NS particles were used.”
Investigating the effect of the cement paste and transition zone on strength development of concrete containing nanosilica and silica fume (2015, background): “The nS may reduce porosity of not only the bulk cement paste, but also the transition zone between the bulk paste and aggregates, and could have done so more effectively than silica fume according to the physical and chemical effects of nS [51].”
Characteristics of blended cements containing nano-silica (2013, background): “NS has a significant role, due to the highly pozzolanic activity with calcium hydroxide (CH) released during the hydration of cement phases to form more hydrated products, which fill the available pores with improving the microstructure [44–48].”