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Rebound hammer test method is based on the principle that the rebound of an elastic mass depends on the hardness of the concrete surface against which the mass strikes. The operation of the rebound hammer is shown in figure-1.
The Rebound Hammer Test on concrete is a Non-destructive testing method of concrete that provides a convenient, fair, and rapid indication of the compressive strength of the concrete.
What is the rebound hammer test? The rebound hammer test is a non-destructive method of testing concrete and is used for the assessment of compressive strength, uniformity, and quality of elements of concrete. With the help of suitable correlations between rebound index and compressive strength, the compressive strength of concrete is found.
REBOUND HAMMER TEST. 1. Objective And Principle. Objective: The rebound hammer method could be used for: assessing the likely compressive strength of concrete with the help of suitable corelations between rebound index and compressive strength, assessing the uniformity of concrete,
Jun 21, 2024 · The Rebound Hammer Test is a non-destructive method for assessing the strength and surface hardness of concrete. It involves complex principles, mechanics, calibration steps & safety considerations to obtain reliable results.
The rebound hammer test is not intended as a substitute for standard compression test, but as a method for determining the uniformity of concrete in the structure and comparing one concrete with another.
How does it work? ASTM C805, “Standard Test Method for Rebound Number of Hardened Concrete”, summarizes the procedure as “A steel hammer impacts, with a predetermined amount of energy, a steel plunger in contact with a surface of concrete, and the distance that the hammer rebounds is measured.”
