石屎槍 混凝土回彈儀 Rebound hammer Concrete test hammer
L225 Concrete Hammer
Concrete Hardness Tester
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 resilience to 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 nondestructive testers, the concrete test hammer is an economical and practical nondestructive testing instrument.
L225 is used for testing the strength of various concrete members (slab, beam, column, truss) of normal building strength and bridge.
Nominal kinetic energy: 2.207J (0.225kgf.m)
Flip tension spring rigidity: 7.84N (0.80kgf) / cm
Punch advance for impact hammer: 75mm
Impact surface hardness value between impact hammer and rod: HRC59-63
Maximum breakout friction of pointer system: 0.49-0.78N (50-80g)
Mean value of steel-anvil rating of concrete test hammer: 80±2
Standards: ISO/DIS 8045, EN 12504-2, ENV 206, DIN1048 part 2, ASTM C805, ASTM D 5873, NFP 18-417, B15-225, JGJ/T 23-2001, JJG 817-1993
Net weight: 1kg
Standard package including: main unit, Grinding wheel, Conversion table, Operation manual and Carrying case.
Remark: appearance of this item has been changed into scarlet with little roughness surface for easier operation by hand
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