RockSchmidt Rock Testing
Article No. 15027
Rockschmidt Type L
The RockSchmidt Rock Tester is world's most advanced rebound hammer, with unmatched dispersion characteristics, durability and measuring range has now been fully adapted for rock testing. It is a portable instrument made for the field assessment of rock properties.
Features
- There are two types available:
- Type N: Standard impact energy, 2.207 Nm. Recommended for field work. For core testing ISRM recommend that cores should be at least moderate strength (> 80 MPa) and at least T2 size (= 84 mm).
- Type L: Low impact energy, 0.735 Nm. Recommended impact energy in the ASTM D 5873 standard for testing of cores. ISRM recommend for testing on cores of moderate strength and above of at least NX size (= 54 mm).
- Impact Angle Independence: The rebound value is independent of the impact direction.
- Optimized for Field Work: Tighter sealing against dirt and dust intrusion for longer life. Significantly lighter and more ergonomic than the classic Schmidt hammer. A large number of readings can be saved and downloaded later to a PC.
- Preset Statistics: Statistics methods recommended by ISRM and ASTM are implemented into the hammer for automatic calculation of the rebound number. The option is also there to define a user specific statistics method.
- Unconfined Compressive Strength: ISRM recommends a correlation between UCS and the rebound value based on the formula UCS = aebR (where R is the rebound value). A correlation in this format may be defined in the software and downloaded onto the RockSchmidt.
- Young's (E-) Modulus: ISRM recommends a correlation between elastic modulus and the rebound value based on the formula Et = cedR (where R is the rebound value). A correlation in this format may be defined in the software and downloaded onto the RockSchmidt.
- Weathering Grade: Impacting on the same location twice can be used to correlate to weathering grade. The ISRM recommended method has been included in the firmware.
Technical Attributes
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- Data
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Impact Energy: (N) 2.207 Nm, (L) 0.735 Nm Dimensions of Housing: 55 x 55 x 250 mm
(2.16" x 2.16" x 9.84")Weight: 570 g Max. Impacts Per Series: 99 Memory Capacity: Dependent on length of test series. Example: 400 series of 10 impacts Display: 17 x 71 pixel, graphic Accumulator Duty: > 5000 impacts between charges Operating Temperature: 0 to 50°C (32 to 122°F) Type N: Geomorphological applications which investigate the bulk hardness properties of a rock outcrop
Prediction of weathering grades
Relative dating of landforms such as moraines and rock glaciers
Prediction of penetration rates for tunnel boring machines and rotary drum cuttersTypeL: Testing on weak rocks, porous rocks and those with thin weathering crusts TypeN/L: Correlation to Unconfined (or Uniaxial) Compressive Strength (UCS)
Correlation to Young's ModulusTesting on Blocks: > 100 mm thick Testing on Cores: N: ≥ 84 mmØ
L: ≥ 54.7 mm Ø
Delivery Content
Battery charger with USB cable, DVD with software, carrying strap, grinding stone, documentation and
carrying bag.
Other Variations