Sustainable Alternatives to Cement: Synthesizing Metakaolin-Based Geopolymer Concrete Using Nano-Silica

The emission of carbon dioxide gas from the cement manufacturing industry has raised concerns about global warming. Geopolymer concrete (GC) is gaining attention as a sustainable and environmentally friendly alternative to traditional concrete. current study focused on using local clay synthesize characterize metakaolin-based GC with varying percentages nanosilica (NS) (1.5%, 3.0%, 4.5%, 6.0%, 7.5% by weight MK content) NaOH/sodium silicate. geopolymer specimens were cured at room temperature for 28 days, their workability, compressive, tensile, flexural strengths measured evaluate influence NS concrete’s mechanical properties. found that increased gradually up 6.0% NS, but any further increase in its ratio resulted reduction characteristics. concludes addition metakaolin (MK)-based produces highest properties, improving compressive strength mix 34.3% compared control split tensile 39% 37%, respectively, strengths. Furthermore, statistical analysis confirms nano-silica’s significant impact emphasizing role performance sustainability an cement-based materials.