Concrete Test Hammer Concrete Rebound Hammer of Testing the Strength 10~70N/mm2 Measuring Range

◆Introduction◆◆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 resile 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 nodestructive testers, the concrete test hammer is an economical and practical nondestructive testing instrument. It is used for testing the strength of various concrete members (slab, beam, column, truss) of normal building strength and bridge. ◆Application:◆ It is used for testing the strength of various concrete members (slab, beam, column, truss) of normal building strength and bridge. ◆Technical Specifications:◆ ◆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, DIN 1048 part 2, ASTM C 805, ASTM D 5873,NFP 18-417, B 15-225, JGJ/T 23-2001, JJG 817-1993 ◆Dimension:60x280mm ◆Net weight:1kg

• (1)【Portable】This instrument has a reasonable structure, it is featured with small size and light weight so that it is easy for carrying, easy to rectify and maintain.
• (2)【Product Characteristics】Hammer shell with special treatment, high hardness, long-term use of non-draw traces in raw materials processing technology, precision design other aspects of life are greatly improved.
• (3)【Advantage】The hammer tester is the first choice applicable for on-the-spot NDT.
• (4)【Measuring range】It is used for testing of concrete compressive strength within the measuring range 10~70N/mm2,accuracy +/-0.1R.
• (5)【Application】Concrete Test Hammer is used for testing the strength of various concrete members (slab, beam, column, truss) of normal building strength and bridge.