Proceq - Schmidt Hammer Concrete Tester Get latest price

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After the spring in the hammer is loaded, the test hammer strikes concrete at a defined energy. The height of the rebounded mass is recorded and measured as an "R" value, this value is dependent on the hardness of the concrete.

By reference to conversion tables, the rebound value can be used to determine the corresponding compressive strength.

When performing a Schmidt Hammer Test, it is critical that the hammer be held at right angles to the surface. The orientation of the Hammer will in turn affect the rebound reading, and different calibration curves are required by orientation. 

No other manufacturer offers such a broad range of impact energy and hardware types. Each hammer is designed for specific test applications.

Original Schmidt Hammer

• Type N
  • This is the workhorse of the range. With a measuring range 20 to 60 MPa compressive strength and impact energy of 2.2J, this hammer is sufficient for most engineering applications. Rebound values are read from a dial and converted to compressive strength using the graphic above it.
• Type L
  • Also with a measuring range 20 to 60MPa compressive strength, this hammer has an impact-energy, which is three times smaller than the Type N. These types are used for testing thin walled (< 100 mm) or small components but also cast stone components sensitive to impact.
• Type NR/ LR
  • With this model Rebound values are recorded as a bar chart on a paper strip. One roll of paper strip offers room for 4000 test impacts.

Pendulum Schmidt Hammer

• Type PT (Concrete Test Hammer)
  • Equipped with a larger plunger surface, it is especially designed to test on softer material such as light weight concrete, gypsum boards and on fresh concrete. It is often used to determine the right time to remove formwork.
• Type PM (Mortar Test Hammer)
  • Designed to test the mortar joints in brickwork. It has a specially developed plunger whose shape ensures the impacts are applied to the surface of the joint, the contact point has a diameter of 8.0 mm. Based on the rebound values the mortar quality can be classified.
• Concrete Compressive Strength Range
  • Each rebound hammer is built for a different purpose, the following table gives an overview of the standard strength ranges and applications for each instrument.

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