Miloud Abid AhlemZenasni HabibaSerier Mohamed2026-10-042026-10-042026https://dspace.univ-temouchent.edu.dz/handle/123456789/7723Cement is a fundamental construction material whose physico-chemical and mechanical properties directly affect structural durability. This study investigates the influence of clinker grindability on the performance of Portland cement by analyzing the effect of fineness (45 μm sieve residue) at different levels. A second part explores the partial substitution of clinker with natural pozzolan up to 20%. The results demonstrate the maintenance of compliant mechanical strength while reducing clinker content and CO2 emissions, contributing to a more sustainable and cost-effective cement.frclinkerfinenessgrindabilitynatural pozzolanPortland cementmechanical strengthCO2.Thesis