The RM – 120 Rock classification hammer and rock cradle. This lightweight and portable impact hammer is used for rock classification tests. The unit is similar to CT – 280 Concrete Test Hammer Normal Type. Cylindrical cores , are held in a horizontal position and the hammer mechanism impacted against the core to obtain rebound readings. A series of readings is taken along the length of the core to get the average classification rebound number
SPECIFICATION
| CT - 280 Concrete Test Hammer Normal Type | |
| Measuring range 10 to 70 N/mm2 compressive strength Impact Energy = 2,207 Nm Rebound values are read from a dial |
|
| Plunger | Applies pressure for hammerrebound |
| Body | Includes indicator scale, calibration curves |
| Calibration Curves | Plot hammer rebound number VS, Compressive strength |
| Rubbing Stone | Prepares test surface |
| Accuracy | With 15% |
| Carrying Case | Plastic |
| RM - 121 Rock Cradle Frame | |
| RM - 122 NW size rock cradle | |
