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Schmidt Hammer

The SCHMIDT Hammer is the most frequently used method worldwide for non-destructive testing of concrete and structural components.

Original Schmidt Hammer, Schmidt Hammer, Schmidt Hammer Test, Hammer Test,

After the spring in the hammer is loaded, the test hammer will hit the concrete at a defined energy. The height of the rebounded mass is recorded and measured by test equipment. Its rebound is dependent on the hardness of the concrete.

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

When performing the Schmidt Hammer Test, it is critical that the hammer need to be held at right angles to the surface which needs to be smooth and flat. The orientation of the Hammer will in turn affect the rebound reading.

No other manufacturer offers such a wide range of different types. Each hammer is designed for specific test applications.

 

Original Schmidt Hammer

Type N

Original Schmidt 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)

Pendulum Schmidt 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 in order to meet the specific needs of the customer. The following table gives an overview of the specifications and applications for each instrument.

 Original Schmidt Hammer, Schmidt Hammer, Schmidt Hammer Test, Hammer Test, The strength of concrete

 

 Test Anvils

Original Schmidt Hammer, Schmidt Hammer, Schmidt Hammer Test, Hammer Test, The strength of concrete

Each test hammer should be checked after 1000 test impacts. A testing anvil is used to check whether the rebound test mechanism is working correctly.

Cleaning or inspection will be required in case of contamination by very fine cement or due to wear.

VIC:

Melbourne

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t (03) 9938 3830

f (03) 9938 3899

m 0428 315 502

NSW:

Sydney

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t (02) 9986 1857

m 0418 381 709

QLD:

Brisbane

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t (07) 3040 6166

m 0419 477 715

 

WA:

Perth (Head Office)

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t (08) 9322 4020

m 0408 034 668

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