A study on the effect of nano silica on compressive strength of high volume fly ash mortars and concretes

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Characteristics of nanoclay and calcined nanoclay-cement nanocomposites (2015, background): “[29] reported that the cement nanocomposite containing 2wt % nano-silica exhibited less calcium hydroxide but slightly more C2S than the control cement paste.”
Incorporation of nano-materials in cement composite and geopolymer based paste and mortar – A review (2017, background): “Thus it provides more effective hydration which leads to higher strength [28].”
Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios (2016, unknown): “4 [17] and 0.”
Characterization of alkali activated slag–fly ash blends containing nano-silica (2015, background): “Due to its considerably fine particle size, nano-silica has been observed to accelerate the hydration process at early ages [23], refine the pore structure [24,25] and enhance the mechanical properties even at small levels of replacement [26].”
Mechanical and durability properties of high volume fly ash (HVFA) concrete containing calcium carbonate (CaCO3) nanoparticles (2014, background): “The combination between fly ash and nano materials can tightly bond the hydration product which is regarded as an important factor for accelerating the pozzolanic reaction as it compensates for the increased early strength development [8–11].”