Abstract
The influence of 1%, 3% and 5% content of ethanolamine (EA) and nano-TiO2 (NT) on the fresh, hardened, microstructural and corrosion resistance properties of cementitious composites under different exposure environments (tap water, saline water and acidic solution) had been investigated. The setting time test confirmed that the EA acts as a retarder while NT acts as an accelerator. The SEM and XRD results indicated that EA had an adverse effect on the microstructure, while NT improved the microstructure and increased the amounts of desirable hydration products. The compressive strengths of EA-admixed mortar under all the exposure mediums were found to be lower than control mortar, while NT had the opposite effects. The corrosion inhibition efficiency of 3% EA was found to be higher than the 5% content in all the three exposure environments, while the corrosion inhibition efficiency of NT was increasing with the increase in the dosage.