Most versions of rebound hammers are divided into two types, based on the impact energy they produce. Both are effective on concrete mixes with a similar range of compressive strengths. Rock Schmidt Hammers are designed with specific geological and geotechnical capabilities.
Click to enlarge or download Schmidt Hammers Comparison Table to compare compressive strength and impact energy between Schmidt Test Hammers.
- Schmidt Type N Test Hammers are often considered as the “standard” models and have a higher energy output to test a wide range of concrete elements and structures 4in (100mm) or more in thickness.
- Schmidt Type L Test Hammers have lower impact energy and provide more repeatable values when testing items less than 4in (100mm) in thickness. Ideal for thinner sections like precast pipe or early-age concrete for form removal or post-tensioning operations, Type L concrete hammers also reduce both cosmetic and structural damage to concrete with thin cross sections.