Overview

Concrete rebound hammer (sclerometer) – is a device for concrete and other building materials strength testing. The engineer Ernst Schmidt invented the construction of the sclerometer.

The method is based on impacting the impact plunger on the concrete surface with predetermined (normed) impacting energy and subsequent measuring of the height of the striker rebounding. The height of the striker rebounding will be proportional to the strength of the concrete. The strength of concrete is determined with the calibration charts that are supplied with the instrument.

There are several versions of the device, which are different in impacting energy.

• The most “powerful” Rebound hammer is designed to measure the strength of concrete with a thickness of 70-100mm and more, also for the strength testing of massive rocks with impact energy – 2,207J (Nm). This is the base and the most common model of the Rebound hammer, about 90% of the Rebound hammers in the world have the same impact energy.
• Average “powerful” Rebound hammer has the 735J (735 Nm) impacting energy. The impact energy is reduced threefold compared with the base model. The main application of this instrument is measuring the strength of bricks and concrete products with a wall thickness less than 100 mm and small sizes of samples, also used for testing the less strength stones and rocks.
• The least “powerful” Rebound hammer has 196J (196Nm) impact energy. The main purpose is the strength testing of the mortar of brick masonry.

Advantages

• Ease in operation
• Good Reliability Design
• High Measurement Accuracy
• Can test all kinds of concrete and other building materials
• 3 modifications with different impacting energy

Specifications