Performing a Rebound Hammer/Schmidt HammerTest Tips for organizing the impact hammer test concrete exterior: •Before executing the test, it is necessary to verify that the concrete surface is smooth and neat. •Use a grinding wheel or stone to remove any crumbs of concrete that may have loosened when pouring the concrete. •One should deal with the Insufficient compaction, grout loss, or spalling that can also cause loose surfaces before conducting your tests. The hammer’s point of impact should n