Monitoring freshly poured concrete using ultrasonic waves guided through reinforcing bars

Ultrasonic guided waves for monitoring corrosion of FRP wrapped concrete structures

“…It has been observed in previous studies [31][32][33][34][35]37,45] that L(0, 1) is a surface sensitive mode which is sensitive to surface modifications in the reinforcing bars due to corrosion and picks up the initial delamination of the reinforcing bar from the surrounding concrete. Similarly, L(0, 7) mode is a core sensitive mode which could pick up another major effect of chloride corrosion, pitting in the bar.…”

“…These modes are capable of discerning the changes at the interface between the surface of the bar and concrete. Understandably, they have been applied in monitoring bar corrosion [32,33] and concrete setting [34,35]. The present paper reports laboratory implementation of the non-destructive procedure for monitoring corrosion of steel in reinforced concrete with glass and carbon fibre wraps.…”

Ultrasonic evaluation of mechanical properties of concretes produced with high early strength cement

“…An interesting characteristic of the UPV method is it can be applied to very early-aged concrete (Trtnik and Gams [25], Sharma and Mukherjee [26]). The technological control of concrete in the early ages is one of the concerns of several civil engineering works, as construction of roller compacted dams, application of shotcrete and production of precast concrete elements, in which the application of high early strength cement to the production of the concrete is very common.…”

Prediction of reinforced concrete strength by ultrasonic velocities

“…Non-destructive ultrasonic methods can be applied in order to determine the concrete quality without any damage before any other applicable destructive testing. Sharma and Mukherjee (2015) investigated pours of concrete using ultrasonic in-situ monitoring technique through the propagation of ultrasonic waves and they said that as concrete solidified and cured, more wave energy escaped into the surrounding concrete resulting in signal attenuation. Li et al (2016) investigated concrete structures using ultrasonic surface wave technique and they used to assess the condition of a reinforced concrete bridge and determined that could be potentially effective for estimating the thicknesses of concrete using this technique.…”