A Literature Survey on Impact of Nano Silica Mixing Methods on Recycled Aggregate Concrete Properties

Abstract

This literature survey examines the impact of different nano silica mixing methods on the properties of recycled aggregate concrete. With the increasing demand for sustainable construction materials, the utilization of recycled aggregates in concrete production has gained significant attention. However, the use of recycled aggregates can lead to lower mechanical properties and durability issues in concrete. To address these concerns, researchers have explored the incorporation of nano silica as a supplementary material in recycled aggregate concrete. Nano silica, with its unique properties such as high surface area and reactivity, has the potential to enhance the mechanical and durability characteristics of concrete. This literature survey analyzes various studies conducted on the effect of different mixing methods of nano silica on recycled aggregate concrete properties. The methods investigated include pre-mixing nano silica with cementitious materials, direct mixing of nano silica with concrete mix, and post-mixing of nano silica with concrete. The findings from the surveyed studies indicate that the mixing method of nano silica significantly influences the properties of recycled aggregate concrete. The dispersion and uniform distribution of nano silica particles in the concrete matrix are crucial for achieving improved mechanical strength, reduced porosity, enhanced durability, and enhanced microstructure. The survey provides insights into the benefits and drawbacks of different nano silica mixing methods and highlights the need for further research to optimize the mixing techniques and dosage of nano silica in recycled aggregate concrete. The knowledge gathered from this survey can aid researchers and engineers in developing sustainable concrete mixtures with enhanced properties by incorporating nano silica in the production of recycled aggregate concrete.