HT-225A Concrete Rebound Hammer
SADT · SKU sadt-HT-225A
The concrete rebound hammer (sclerometer) transmits the impact of a hammer to the concrete surface through a set elastic force; part of the initial kinetic energy is absorbed as plastic or residual deformation of the concrete, while another part, proportional to the surface hardness, is transmitted back to the hammer, making it rebound to a certain height. Concrete strength is derived from the proportional relationship between rebound height and concrete strength. It is economical, simple in construction, easy to calibrate, maintain and repair, and portable. The HT-225A is used to measure the strength of normal concrete elements (slabs, beams, columns, trusses) in buildings and bridges.
Technical specifications
| Model | HT 225A |
| Dimension | 60x280 mm |
| 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 |
| Net weight | 1 kg |
| Nominal kinetic energy | 2.207 J (0.225 kgf·m) |
| Tension spring stiffness | 7.84 N (0.80 kgf)/cm |
| Steel-anvil rating mean value | 80±2 |
| Impact hammer percussion travel | 75 mm |
| Impact surface hardness between hammer and rod | HRC 59-63 |
| Maximum breaking friction of the needle system | 0.49-0.78 N (50-80 g) |
Specifications subject to confirmation in the formal quote.
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