SADT HT-225A is a compact Concrete
Testing Hammer, commonly used for testing of strength and hardness of various
types of concrete materials.
When testing the strength of
concrete, the concrete test hammer uses a certain elastic force to transit the
impact force of an impact hammer to the surface of concrete, its initial kinetic
energy redistributes, a part of energy in the form of plastic deformation or
residual deformation is adsorbed by the concrete, and another part of energy
which is proportional to the surface hardness is transmitted to the impact
hammer, making the hammer resilie to a certain height, then the strength of the
concrete is derived from the proportional relation between the height of
resilience and the concrete strength.
With the merits of simple structure,
easy correction, maintenance and repair, and portability, the concrete test
hammer is widely used in civil engineering and construction industry for testing
the strength of concrete. Compared to other non-destructive testers, the
concrete test hammer is an economical and practical nondestructive testing
instrument.
HT-225A is used for testing the
strength of various concrete members (slab, beam, column, truss) of normal
building strength and bridge. The HT 225A is comparable with the Schmidt Hammer,
Type N, this method of testing is covered by DIN 1048 and BS1881 part 202,
referring to assessment of the rebound hardness of mortar which is directly
related to the compressive strengths of the tested material.
TECHNICAL SPECIFICATIONS:
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HT 225A |
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2.207J (0.225 kgf.m) |
Flip tension spring rigidity
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7.84N (0.80 kgf) / cm |
Punch advance for impact hammer
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75 mm |
Impact surface hardness value between impact
hammer and rod
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HRC59-63 |
Maximum breakout
friction of pointer system
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Mean-value of
steel-anvil rating of concrete test hammer
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ISO/DIS 8045, EN 12504-2, ENV
206, DIN 1048 part 2, ASTM C 805, ASTM D 5873, NFP 18-417, B 15-225, JGJ/T
23-2001, JJG 817-1993
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SUPPLIED WITH:
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Main unit HT225A
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Grinding wheel
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Conversion table
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User manual
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Protective carrying case
DOWNLOADS:
