The Effect of Corrosion Inhibitor Admixtures on Concrete Properties and Corrosion of Steel Reinforcement

Abstract

This part is aimed to study the impact of using amino and ester-based inhibitor (AI), nitrite-based inhibitor (NI), and phosphate-based inhibitors (PI) on concrete mechanical properties. The influence of these inhibitors on workability, compressive strength, splitting tensile strength, bond strength were evaluated. And microstructure of concrete was evaluated for each inhibitor using a scanning electron microscope (SEM). 7.3 Summary of part II: This part is aimed to study the concrete durability for each inhibitor in addition to high strength concrete (HSC). First; corrosion resistance was examined for each inhibitor. For corrosion acceleration purpose, the accelerated corrosion technique which is the galvanostatic method was used. The specimens used for corrosion measurement purpose were added in water containing 3% NaCl. Second; sorptivity, density, percent of absorption, and percent of voids in hardened concrete were measured. Also, an economical study was made to compare between the cost of one cubic meter for each of the five mixes. The increase in cost and percentage in the value of each mix from the blank/control mix was also calculated.