A concrete test hammer (or rebound hammer/Swiss hammer) is used for non-destructive testing (NDT) to quickly assess the in-place compressive strength, hardness, and uniformity of hardened concrete in existing structures, detecting poor quality, surface damage (like fire/freeze damage), and verifying repair effectiveness without drilling cores. It works by measuring the rebound of a spring-loaded mass after impacting the concrete, giving a rebound number that correlates to strength.
Description
A concrete test hammer (or rebound hammer/Swiss hammer) is used for non-destructive testing (NDT) to quickly assess the in-place compressive strength, hardness, and uniformity of hardened concrete in existing structures, detecting poor quality, surface damage (like fire/freeze damage), and verifying repair effectiveness without drilling cores. It works by measuring the rebound of a spring-loaded mass after impacting the concrete, giving a rebound number that correlates to strength.
