Durability study of mortar modified with corrosion inhibitors and waterproofing compounds

The durability of concrete is largely controlled by its permeability, which depends on the densification of the microstructure. This study examines the impact of mineral admixtures (silica fume and ground granulated blast furnace slag (GGBFS)) and chemical admixtures (bipolar corrosion inhibitors and waterproofing compounds) on mortar porosity at 28, 56, and 92 days, as well as on fresh properties and durability performance. X-ray diffraction and SEM analyses show that mineral admixtures reduce permeability. The results demonstrate that mineral admixtures significantly refine the pore structure and enhance resistance against chloride ingress. Both 50% GGBFS and 10% silica fume achieved similar improvements in chloride resistance. While the crystalline waterproofing agent increases water absorption and slows setting, the corrosion inhibitors significantly enhance the durability of the mortar matrix. Overall, the study highlights the superior contribution of mineral admixtures to long-term durability, while chemical admixtures provide additional advantages in specific applications.