Study on durability of fly ash geo-polymer concrete with nano alumina

ABSTRACT

This study investigates the effect of alumina (Al₂O₃) nanoparticles on the performance of geopolymer concrete composed of fly ash and ground granulated blast furnace slag (GGBS). The research focuses on the influence of nano-alumina on workability, mechanical strength, and durability. Results show that incorporating 2% nano-alumina, by mass of fly ash, yields optimal improvements in compaction, split tensile strength, and flexural strength. Additionally, the concrete exhibited enhanced resistance to water absorption, acidic environments, and salt solutions with nano-alumina content up to 2%. However, exceeding this percentage led to a decline in mechanical properties. These findings indicate that 2% nano-alumina is the ideal concentration for maximizing both the mechanical performance and durability of geopolymer concrete. The study underscores the potential of nano-engineered geopolymer concrete as a promising alternative to conventional concrete in the construction industry.

Keywords:
Geo-polymer concrete; Nano alumina; Durability; Mechanical property; Workability