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Recently published experimental evidence shows that nano-silica is a material that can be used to enhance the strength
and durability characteristics of concrete. Engineered concrete at the nano-scale is achieved through the integration of
nano-materials in suitable proportions and relevant mixing methods. Being a pozzolanic and reactive material along with
nucleation effects and miniature particle size, nano-silica has been found to significantly improve the micro-structural
characteristics of concrete making it denser and more uniform.
The ongoing research work at the University of Melbourne is based on a novel modelling approach to further investigate
the performance characteristics of nano-silica on cement paste at the micro-meter scale. The volumetric proportions of
different phases present in concrete are computed considering hydration characteristics of cement and those of nanosilica.
A Representative Volume Element (RVE) of the cement paste at micro scale is developed considering the
hydrated gel as the matrix material while other phases present are integrated as randomly distributed spherical particles.
Constitutive material models for these phases are assumed. The stress-strain relationship for the RVE is then generated
using COMSOL Multiphysics software. The approach proposed in this paper is an initiation towards developing an acute
and compressive model to predict the performance characteristics of nano-engineered concrete.
Madhuwanthi Rupasinghe,Priyan Mendis,Massoud Sofi, andTuan Ngo
"Modelling of nano-silica in cement paste", Proc. SPIE 8793, Fourth International Conference on Smart Materials and Nanotechnology in Engineering, 87931R (9 August 2013); https://doi.org/10.1117/12.2028056
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Madhuwanthi Rupasinghe, Priyan Mendis, Massoud Sofi, Tuan Ngo, "Modelling of nano-silica in cement paste," Proc. SPIE 8793, Fourth International Conference on Smart Materials and Nanotechnology in Engineering, 87931R (9 August 2013); https://doi.org/10.1117/12.2028056