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Concrete Hammer
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Core Cutter |
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The concrete test hammer is an
instrument which is easy to use, for quick and |
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approximate measurement of the
resistance to pressure of manufactured |
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concrete products. The principles on
which it works are based on the rebound |
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impact of a hammer on a piston
which rests against the surface of concrete |
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products. The greater the resistance
of the concrete, greater is the rebounded |
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impact. By reading this rebound
impact on the scale and relating it to curves on |
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graphs supplied with the
instrument, the resistance to compression in MPa or
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PSI can be found, with +/-20% of
actual. |
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Specifications: |
Consists of a barrel in which is
housed a hammer |
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mass attached to an impact spring
which slides on a guide bar. A plunger is |
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attached to the guide bar which is pressed against the
surface to be tested. As the piston is pressed against
the surface to
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be tested, on reaching the compressive
strength, the hammer
mass is released and rebounds to a certain extent which
is
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indicated by a rider on a calibrated scale. |
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A lock button fixed on the body of hammer locks
the
hammer in place and the rider can recared to zero
position by using
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the same button. The equivalent compressive strength can
be computed from the chart supplied. Each hammer is
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calibrated against at standard test hammer and is
suitable for specimen of compressive strengths 100-700
kg/cm. The
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instrument complete with a grinding stone for polishing
the test surface, is supplied in carrying case |
