Hydration of blended ladle slag and calcium aluminate cement

Partial replacement and co-hydration of calcium aluminate cement (CAC) with ladle slag was investigated in this study as a pathway valorizing the reducing economic cost CAC. The impact on physical microstructural properties were analysed using different techniques such mechanical strength test, freeze-thaw, sulfate attack, XRD, SEM etc. Thermodynamic modelling used to predict phase assemblages blended hydration kinetics system. Experimental results showed reference CAC mortar substituted exhibited comparable gain at 7 28 days, durability measured by abrasion, freeze-thaw resistance. A low water-to-binder ratio (0.35) lessened effect conversion hydrates, XRD metastable CAH10 C2AH7.5 hydrates 7, 60 days. This however can convert later thermodynamically stable C3AH6. suggests these two phases major binding phases, while Si-hydrogarnet FeOOH appeared minor trace binder. *Cement chemistry notation used, where C = CaO, Al2O3 H H2O