Gilson Concrete Test Hammer
Gilson Concrete Test Hammer gets you fast and reliable concrete strength measurements. Can test large surface areas or problem areas in a short amount of time. This rebound hammer has a compressive strength range of 1,450—10,152 psi (10—70 mPa), can test concrete in this range and impact energy of 2.207 Nm (1.63 ft-lbf). Can test concrete with a minimum thickness of 4 inches.
The Gilson rebound test hammer is a reliable, economical Type N model and meets ASTM C805, BS 1881-202 and EN 12504-2 standard test methods. Has a rugged mechanism with a proven track record of accuracy and reliability. For accurate readings make sure to have good contact between the hammer and a dry concrete surface. This hammer housing is machined aluminum and gives accurate and consistent performance. Outputs rebound values and these values are used to estimate compressive strength. Durable nylon carrying case with sturdy carrying handle, carborundum stone for surface preparation and impact energy charts are included. The HM-76B Calibration Anvil is recommended to verify calibration after every 1,000 to 2,000 impacts.
The original Schmidt hammer, invented by Ernst O. Schmidt in 1954, set the standard for non-destructive concrete testing and the Gilson hammer is based on this original Schmidt hammer model, it’s a reliable instrument for today’s testing. Today there are several models of rebound hammers available each with different features and capabilities for different testing scenarios.
Features:
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Accurate, economical and reliable
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Easy to use for fast and reliable strength testing
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Aluminum housing
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Meets ASTM C805 and other standard test methods
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Gilson hammer is one of several models available and is a reliable instrument for non-destructive testing
Included Items (supplied):
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Carrying case
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Carborundum stone
Take multiple readings when using the hammer. The rebound hammer is also known as concrete test hammer or Schmidt hammer is an essential tool for evaluating the quality of hardened concrete. This non-destructive testing tool measures the surface hardness of concrete which gives a reliable estimate of its compressive strength. By using a spring-loaded mass that hits the concrete surface the rebound hammer records a rebound value that correlates with the material’s strength. This allows for quick and easy concrete testing without damaging the structure. The rebound hammer is known for its cost-effectiveness and versatility making it a popular choice for concrete testing in various construction projects. It can determine compressive strength and surface hardness on-site and ensures the safety and durability of concrete structures.
What is Rebound Hammer
The rebound hammer is a simple yet powerful tool for testing concrete. Its operation is based on the principle of measuring the rebound of a spring-loaded mass after it hits the concrete. The resulting rebound value is directly related to the hardness and by extension the compressive strength of the concrete. This testing is valued for its simplicity and speed, gives immediate results and helps professionals to make informed decisions about concrete quality. Since the rebound hammer is a non-destructive device it allows for repeated testing on the same structure without causing any harm. This makes it ideal for routine inspections, quality control and ongoing monitoring of concrete durability and strength.
Types of Hammers and Selection
There are several types of concrete test hammers available to suit different testing needs. The Schmidt hammer is the most widely used model, known for its reliability and available in various versions such as Schmidt L, Schmidt M, Schmidt S, each for specific applications and concrete types. Other options are the Windsor probe and Proceq hammer which has digital display for more accurate results. When selecting a test hammer consider the type of concrete being tested, its moisture content and the surface texture. Choosing the right hammer ensures accurate and consistent results and makes it easier to evaluate the quality and performance of concrete structures.
Gilson Concrete Test Hammer Accessories:
Test Hammer Calibration Anvil is recommended to check the calibration and verify the accuracy of the test hammer unit after so many impact tests.
Applications and Limitations of Compressive Strength Testing
Rebound hammers are used in the construction industry for quality control and assurance of concrete structures. They are used to monitor the curing process, detect defects and estimate in-place concrete strength. However while rebound hammers are useful, their accuracy can be affected by surface roughness, moisture content and environmental conditions. So the rebound value should be interpreted with caution and it is often recommended to use the rebound hammer with other testing methods for a more comprehensive evaluation. Knowing these limitations ensures that the results are reliable and the concrete structure is properly evaluated.
