Comparative Study of Hydration Kinetics in Binary and Ternary Cements Using the Avrami Model

This study used a differential scanning calorimeter (DSC) in semi-adiabatic mode to investigate the hydration kinetics of binary and ternary cements, utilizing the Avrami-Kolmogorov model to determine key kinetic parameters.Two types of cement were developed: binary (made up of limestone and pozzolan) and ternary.To determine the most effective dosages, we compared the cements' physicochemical and mechanical properties to those of standard OPC cement (CEM I).The findings indicate that the presence of limestone in the cement has a negative effect on the residue on the sieve, thereby influencing the grinding process.After analyzing the three types of additives, we discovered that the optimal doses of limestone and pozzolan are 10%.The P10 mortar had the highest compressive strength (48.4MPa), followed by the L10 mortar (45.45MPa); the PL30 mortar had the lowest value of 40.7MPa, while the OPC cement reached 52.3MPa.DSC measurements of heat flow and hydration enthalpy show that the reference OPC cement has high values of Qmax (492.25 J/g) and H (1513.6J/g).The OPC cement has higher values of max (0.92) and Ea (45.818 kJ/g), followed by limestone and pozzolan cement.The lowest values are found in ternary cements.Thus, we determined that the optimal dosage for binary cement is 10% pozzolan and 10% limestone, and for ternary cement is 5% limestone and 25% pozzolan.The compressive strength, max, H, Ea, and QMax were statistically analyzed using ANOVA.This analysis revealed that QMax and compressive strength have a significant impact on cement.