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General procedure for impact-echo testing..... 116 11.3.4. Applications of and examples of the use of the impact-echo testing method..... 117 11.3.5. Range and limitations of impact-echo testing method ..... 117
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- Rebound Hammer or Schmidt Hammer (ASTM C805) Method: A spring release mechanism is used to activate a hammer which impacts a plunger to drive into the surface of the concrete.
- Penetration Resistance Test (ASTM C803) Method: To complete a penetration resistance test, a device drives a small pin or probe into the surface of the concrete.
- Ultrasonic Pulse Velocity (ASTM C597) Method: This technique determines the velocity of a pulse of vibrational energy through a slab. The ease at which this energy makes its’ way through the slab provides measurements regarding the concrete’s elasticity, resistance to deformation or stress, and density.
- Pullout Test (ASTM C900) Method: The main principal behind this test is to pull the concrete using a metal rod that is cast-in-place or post-installed in the concrete.
Aug 26, 2014 · The present study aims to develop a pendulum impact test method to determine the impact resistance of Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC). Different impact test...
Jul 1, 1983 · Impact Tests The performance tests developed to evaluate the resistance of concrete to impact are described in this section. These tests can be performed safely and easily within an enclosed laboratory and provide a basis for comparing the impact resistances of different concretes.
- J.R. Clifton, L.I. Knab
- 1983
Rebound Hammer test is a Non-destructive testing method of concrete which provide a convenient and rapid indication of the compressive strength of the concrete. The rebound hammer is also called as Schmidt hammer that consist of a spring controlled mass that slides on a plunger within a tubular housing.
Until now the materials industry has been lacking an acceptable and practical test that demonstrates the relative brittleness and impact resistance of various concrete mixes and similar construction materials. A simple, portable, and practical test has been developed that performs this function.
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The impact-echo method is a technique for flaw detection in concrete. It is based on monitoring the surface motion resulting from a short-duration mechanical impact. The method overcomes many of the barriers associated with flaw detection in concrete based on ultrasonic methods.
