Partnersuche übers internet erfahrungen - Dating seiten test Hamm
When the plunger of the rebound hammer is pressed against the surface of the concrete, the pring-controlled mass rebounds and the extent of such a rebound depends upon the surface hardness of the concrete.
The surface hardness and therefore the rebound is taken to be related to the compressive strength of the concrete.
The rebound value is read from a graduated scale and is designated as the rebound number or rebound index.
The compressive strength can be read directly from the graph provided on the body of the hammer.
ii) Apply light pressure on the plunger – it will release it from the locked position and allow it to extend to the ready position for the test.