Nanotechnology in concrete – A review

Effect of nano-silica on rheology and fresh properties of cement pastes and mortars

Nano reinforced cement and concrete composites and new perspective from graphene oxide

Beneficial role of nanosilica in cement based materials – A review

Pore structure and chloride permeability of concrete containing nano-particles for pavement

Influence of nano-SiO2 addition on properties of hardened cement paste as compared with silica fume

The pozzolanic activity of nano-SiO2 and silica fume was comparatively studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and the compressive, bond and bending strengths of hardened paste and concrete were also measured. Results indicate that the compressive strength development of the paste made from Ca (OH)2 and nano-SiO2, the reaction rate of Ca (OH)2 with nano-SiO2 and the velocity of C−S−H gel formation from Ca(OH)2 with nano-SiO2 showed marked increases over those of Ca(OH)2 with silica fume. Furthermore, the bond strength at the interface between aggregate and hardened cement paste, and the bending strength of concrete incorporated with 3% NS increased more than those with SF, especially at early ages. To sum up, the pozzolanic activity of nano-SiO2 was much greater than that of silica fume. The results suggest that with a small amount of nano-SiO2, the Ca(OH)2 crystal at the interface between hardened cement paste and aggregate at early ages may be effectively absorbed in high performance concrete.

Chen Rongshen

Papers

Influence of nano-SiO2 addition on properties of hardened cement paste as compared with silica fume

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