Use of Electrochemical NDT Tests for Evaluating the Effectiveness of Cementitious Materials for Corrosion Repair of RC

For many years, electrochemical nondestructive testing (NDT) techniques have been utilized in the construction sector to examine the structural soundness and safety of many kinds of buildings. Half-cell potential, macrocell current, and linear polarization resistance are three distinct kinds of electrochemical NDT techniques described in this work to test RC resistance to chloride attack and to help develop solutions to improve the durability and hence the service life of RC structures. The effectiveness of these three kinds of NDT procedures is discussed, as well as the electrochemical processes that occur when three distinct types of cementitious repair materials are subjected to sodium chloride. The findings of this experimental investigation reveal that the three distinct forms of NDTs used to measure the performance of three different types of cementitious material restoration have a close connection in terms of outcomes. After monitoring corrosion of repair materials exposed to chloride attack using HCP for the duration of the testing period, it was discovered that there is a greater than 90% chance that no corrosion is occurring for Mix F. Similarly, during monitoring corrosion activity using the macrocell corrosion method, it was discovered that Mix F has the least amount of corrosion conductivity with a value of less than 5 Coulombs. Mix F had the lowest corrosion rate density utilizing LPR NDT, with a value of less than 1 µA/cm2. Using these three types of NDT techniques, the differences in performance among three different kinds of cementitious materials while in contact with a concrete substrate and subjected to sodium chloride were also observed. Other NDT approaches will need to be investigated further in order to elucidate the chemical composition of more efficient cementitious repair materials subjected to sodium chloride.