Humboldt Concrete Rebound Hammer
Humboldt's concrete rebound hammer provides a reliable, yet economical, alternative to the original schmidt hammer. It is designed for testing concrete 4" (100mm) or more in thickness with a maximum particle size less than or equal to 1.25" (32mm), providing a quick and simple test for obtaining an immediate indication of concrete strength in various parts of a structure. The Humboldt rebound hammer covers a compressive strength range of 1,450 to 9,000 psi (10 to 62 MPa). To operate, the rebound hammer is pressed against the concrete structure and the rebound values are displayed on a mechanical sliding scale. These values can then be correlated to compressive strength by using the conversion table chart affixed to the hammer. It includes a grinding stone, a cloth carrying case, instruction booklet and conversion charts.Concrete Test Rebound Hammer, Type N Features:
- Accurate, economical, and dependable
- Easy-to-use for fast and reliable strength assessments
- Durable aluminum housing
- Meets requirements of ASTM C805 and other standard test methods
Included Items:
- Concrete Test Hammer
- Carrying case
- Carborundum stone
- Impact energy charts
Concrete Test Rebound Hammer, Type N Technical Data and Specifications:
- Measuring range: 10 to 70 N/mm² compressive strength
- Impact energy: 2.207 Nm, 1450 - 10,152psi (10-70mPa)
- Dimensions: 280 x 80 mm (length x diameter)
- Weight: 1.5 kg
- Calibration: traceable to NIST
These concrete testing hammers come complete with everything required to accurately calibrate the hammers. Also includes a plastic carrying case, charts, instructions, and carborundum stone for surface preparation.
Schmidt Type N Concrete Hammer Test Methods
The Concrete Test Hammer uses a spring-loaded mechanism to deliver a consistent and reproducible impact force to the surface of the concrete. This force creates a rebound effect, which is then measured by the instrument to determine the compressive strength of the concrete. With a measuring range of 10 to 70 N/mm², this test hammer can accurately measure the strength of most concrete structures.
The hammer itself is compact and lightweight, with a length of 280mm and a diameter of 80mm, making it easy to carry and use in the field. It weighs only 1.5 kg, making it convenient for extended use.
The Concrete Test Hammer is calibrated to ensure accurate and reliable results, with a calibration that is traceable to NIST. This means that you can trust the results of your tests to be accurate and consistent, time after time.
Overall, the Concrete Test Hammer is an essential tool for anyone working with concrete structures. With its reliable and accurate measurements, compact design, and traceable calibration, you can be sure that you are getting the best possible results every time you use it.
- ASTM C 805
- BS 1881-202
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