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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.
1) The rebound hammer is tested against the anvil made of steel having a Brinell hardness of about 5000 N/mm 2. 2) After the rebound hammer is calibrated for accuracy on the test anvil, the rebound hammer is held at the right angle to the surface of the concrete structure for taking the readings.
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 is a Non-Destructive Test method widely used to measure the quality, uniformity & compressive strength of the concrete. It is a straightforward test and can get the results immediately without any problematic calculation.
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 standard procedure for rebound hammer test, as outlined by ASTM C805, involves impacting a steel plunger in contact with the concrete surface with a steel hammer, and measuring the distance the hammer rebounds.
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.”
Dec 6, 2023 · The rebound hammer test is based on the principle that the rebound of an elastic mass depends on the hardness of the surface against which its mass strikes. When the hammer hits the concrete, its spring-controlled mass rebounds back a certain distance which depends on the surface hardness.
Feb 24, 2023 · The rebound hammer test is a Non-destructive Method widely used to estimate concrete strength. The test involves striking the concrete surface with a rebound hammer and measuring the rebound index. This index is then correlated with the concrete's compressive strength using conversion charts or tables.
What is the Rebound Hammer Test? A straightforward analysis of test hammer data allows quick, cost-effective, and informed decisions on structural suitability. A broad assessment of a structure with a test hammer is a cost-effective way to decide if a more in-depth testing program is needed.
