Impact of Metakaolin and Limestone Powder Ratio on the Hydration and Compressive Strength of Limestone-Calcined Clay Cement Using Calcined Clay With High Metakaolin Content

Key Points

• The research aims to investigate the effects of metakaolin and limestone powder ratios on the hydration and compressive strength of limestone-calcined clay cement.
• Utilized high-purity metakaolin (90% kaolinite) in limestone-calcined clay cement (LMC)
• Examined varying replacement ratios of limestone powder (LSP)
• Compared compressive strength outcomes with prior LMC mix proportions
• Increasing the replacement ratio of limestone powder enhances compressive strength
• Higher ratios of metakaolin in Supplementary Cementing Materials (SCMs) correlate with increased C-(A)-S-H formation
• Smaller pore sizes lead to improved strength characteristics