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Rebound hammer test on concrete pdf.
In addition influence of test conditions and some general guidance on the interpretation of test results are also given.
The test can thus be conducted horizontally on vertical surfaces or vertically upwards or downwards on horizontal surfaces if the situation demands the rebound hammer can be.
Rebound hammer is 13311 part 2.
Impact energy for rebound hammer for different applications.
For this the rebound hammer is tested against the test anvil made of steel having brinell hardness number of about 5000 n mm2.
13311 part 2 for this test.
Schematic of rebound hammer 3.
The operation of the rebound hammer test is shown in the figure below.
Reference is 13311 part 2 1992 reaffirmed may 2013 non destructive testing of concrete methods of test rebound hammer.
Rebound hammer test is a non destructive ndt test of concrete and simple concrete test which is used to test the compressive strength of concrete without any damage.
When using the rebound hammer the limitations of the test method should be recognized and taken into account.
At the same time a spring controlled mass rebounds back.
In the procedure of rebound hammer test the plunger of rebound hammer is pressed on the surface of concrete so that a spring controlled mass with a constant energy is made to hit the concrete surface.
456 2000 specified the non destructive tests are used to obtain estimation of the properties of concrete in the structure the methods adopted include rebound hammer.
During the test when the plunger of the rebound hammer is suppressed against the surface of concrete a spring controlled mass with constant energy is made to hit the concrete surface to rebound back.
In 1992 they published is.
For taking a measurement the rebound hammer should be held at right angles to them surface of the concrete member.
The rebound hammer developed by schmidt provides an inexpensive and quick method for nondestructive testing of concrete.
Rebound hammer test procedure.
Bureau of indian standard did not published any standard for this test upto 1991.
The force of rebound which is a measure of surface hardness is measured on a graduated scale.
Procedure for rebound hammer test.