Correction: Lay et al. Ultrasonic Quality Assurance at Magnesia Shotcrete Sealing Structures. 2022, , 8717.

The authors wish to correct the following errors in the original paper [...

Ultrasonic Quality Assurance at Magnesia Shotcrete Sealing Structures.

Engineered barriers are a key element to enable safe nuclear waste disposal. One method currently under research for their construction is magnesia concrete applied in a shotcrete procedure. In this study, the ultrasonic echo method is evaluated as a means for quality assurance.