Here i will explain about how to use hammer test concrete structure,
Hammer test is a tool of quality inspection of concrete without damage concrete. In addition, using this method will be sufficient lot of data in a relatively short time with a low cost.
This test method is done by giving intact load (Collision) on the concrete surface using a mass of which Activated by using a certain amount of energy. Distance of reflection Arising from the mass at the time of the collision with the surface Concrete test specimens can provide an indication of violence also after calibration, Can provide this test is a kind of "Hammer"
In planning a building structure is usually preceded by Make some assumptions such as the magnitude of the forces that work And the quality of materials to be used which ultimately syclus planning
Product quality on a large scale, for example for the concrete to be Used in the manufacture of a building that is produced in large Quantities are attempted to be predicted based on the quality that the tests referred to in Small-scale laboratory (cube test) while carrying out the planning Mixed design.
This tool is very sensitive to the variations that exist on the surface of the concrete, for example the presence of rock particles on certain parts near the surface. Therefore, it is necessary to take several measurements around each measurement site, which the result is then averaged.
Pros and Cons of "Hammer test".
Advantages :
Cheap, Measurements can be done quickly, Practical (easy to use) and Not damaging
Deficiency :
Test results are affected by surface flatness, concrete moisture,
Nature and type of coarse aggregate, degree of carbonization and age of concrete. Therefore
It should be remembered that the concrete to be tested must be of the type and condition
the same one. It is difficult to calibrate the test results, the reliability level is low, Just give the imformation about the characteristics of the concrete on the surface
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