Influence of Nano-SiO₂ and Nano-TiO₂ on Self-Compacting Concrete: A Study of Rheology and Strength Improvement
J. Environ. Nanotechnol., Volume 13, No 4 (2024) pp. 161-168
Abstract
Self-Compacting Concrete (SCC), known as advanced concrete, flows and consolidates under its own weight, even in confined or congested spaces, without mechanical vibration. This study examines the impact of using nanoparticles, namely Nano-Silica (N-SiO₂) and Nano-Titanium Dioxide (N-TiO₂), as a partial replacement for cement in SCC. Six mix variations were created with different quantities of N-SiO₂ and N-TiO₂, and their fresh and hardened characteristics were tested. Fresh-state tests, such as slump flow, V-funnel, and L-box, proved the good workability and passing ability of all mixtures, which met EFNARC 2005 requirements. The combination of 6% N-SiO₂ and 4% N-TiO₂ performed best in terms of mechanical strength. SEM studies demonstrated that the optimized mix had better particle packing, fewer voids, and a greater density. Water absorption tests revealed enhanced durability and lower permeability. The findings indicated that the use of nanoparticles enhances the flowability, strength, and durability of nano-modified SCC.
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