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Rock Classification

ASTM D5731 | ISRM | ASTM D5873 | AS 4133.4.1
Rock strength index apparatus
Rock strength index apparatus
Rock strength index apparatus
Rock strength index apparatus
The rock strength index apparatus consists of a high stability load frame 100 kN cap. with hydraulic loading ram actuated by a hand pump. Loading frame and manual pump are independent resulting in a superior functionality and usability of the equipment.

45-D0550: Digital rock strength index apparatus, 100 kN cap. conforming to ASTM D5731 and ISRM suggested method, complete with:
- Testing frame with high performances hydraulic jack and manual pump
- Load measurement by pressure transducer (traceable calibration certificate included)
- In built meter measuring the vertical clearance between the conical platens
- Supplied with rigid ergonomic carrying case with wheels
Battery charger 110-230 V, 50-60 Hz, 1 ph. Power cable included

Main features:
  • Superior functionality and usability of the equipment, since the pump is separate from the frame
  • Ergonomic digital read out unit with wide graphical display and 6 keys membrane keyboard
  • Effective resolution: 18 bit (1/262'000 div.)
  • Load measurement accuracy: ± 1 % 
  • Load resolution: 1 N
  • Supplied complete with traceable calibration certificate for load measurement accuracy 
  • Set of lower and upper platen with spherical seat for compression tests on small cylinders available as accessory 

The unit is conforming to ASTM D5731 and ISRM suggested method and the wide testing area allows to test both rock cylinders and irregular shaped samples.

45-D0550/D5: Set of lower and upper platen 52 mm dia. with spherical seat

45-D0550/D6: Mounting tool suitable for the conical points fitted on point load machine

58-C0215/T2: Serial cable for PC connection. Requires a PC with RS232 serial port or RS232/USB adaptor (see our model 82-Q0800/3)

Rock classification hammer
Rock classification hammer is used to measure the rebound index on rock cores and samples.

32-D0561/C: Rock test classification hammer with low impact energy 0.735 Nm.
Supplied with hard plastic carrying case. Conforming to ASTM D5873 and ISRM.

The device is simple, easy to use, and is similar to the one used for testing concrete.
The level of impact energy only is different: 0.735 Nm.
Rock cores are positioned horizontally and the rebound index is obtained from the average of several measurements performed perpendicularly to the longitudinal axis, using the ASTM rock cradle as shown in the picture.

32-D0562/A: ASTM rock cradle, Universal model, can hold rock core samples from
EX (21.46 mm) to NX size (54.74 mm dia.). The cradle comprises a vertical hammer guide fit to a steel plate of minimum mass conforming to ASTM D5873, and a magnetic “V” block that can be easily fit to the steel plate.

Rock pick
Mohs hardness scale set
Rock picks and hardness scale are used for preliminary rock identification.

  • 32-D1710 Fully polished, leather grip. Weight approx.: 650 g
  • 32-D1711 Fully polished, nylon vinyl grip. Weight approx.: 550 g

32-D1710: Rock pick pointed tip

32-D1711: Rock pick chisel edge

32-D0529: Mohs hardness scale set
Set of 9 mineral specimens.


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  • Home
  • Calibration
  • Equipment
    • Aggregates >
      • Sieves & Accessories
      • Sieve Shakers
      • Sample Splitters
      • Sand Equivalent Kit
      • Clay Index Kit
      • ALD & AGD Apparatus
      • Los Angeles Abrasion Machine
      • Specific Gravity Frame & Baskets
      • Density, Voids & Absorption
      • Cleanness Value Agitator & Washing Vessel
      • Weathering Index Roller & Tray
      • Crushing Value Apparatus (ACV)
    • Soil & Road Base >
      • Augers & Accessories
      • Sampling & Classification
      • Field Inspection Testers
      • Scala Penetrometers
      • Impact Soil Tester (Clegg)
      • Plate Bearing Test Apparatus
      • Particle Size Analysis
      • Atterberg Limits
      • Universal Proctor/CBR Automatic Compactor
      • Standard & Heavy Compaction (Proctor)
      • California Bearing Ratio (CBR) Apparatus
      • Vibrating Compaction Hammer
      • Moisture Content Determination
      • Sample Preparation
      • Chemical Tests Apparatus
      • Permeability Apparatus
      • Field CBR Test Set
      • Sand Replacement Test Sets
    • Concrete & Cement >
      • COMPACT-Line Concrete Compression Machines
      • SMART-Line Control Consoles
      • Control Consoles for Advanced Testing
      • Flexural Testing Frames
      • Concrete Pipe Testers
      • Concrete Mixers
      • Concrete Moulds
      • Concrete Specimen Curing
      • Specimen Grinding Machines
      • Cutting & Coring Machines
      • NEX® Monitoring System
      • TruMatch™ NEX® Curing
      • Workability & Consistency of Fresh Concrete
      • Air Entrainment Meters
      • Bleeding & Density of Fresh Concrete
      • SCC Testing Apparatus
      • Gyratory Compactor for Cement & Concrete
      • Water Permeability Apparatus
      • Concrete Compaction
      • Concrete Mortar Penetrometers
      • NDT Strength Evaluation Apparatus
      • NDT Quality & Homogeneity Evaluation
      • NDT Durability Test Apparatus
      • NDT Structural Inspection & Monitoring
      • Cement & Grout Moulds
      • Mortar Mixers
      • Cement Specimen Curing
      • Compression-Flexural Cement Testers
      • Soundness by Le Chatelier
      • Setting Time & Consistency
    • Asphalt & Bitumen >
      • Standard Asphalt & Bitumen Test Equipment >
        • Centrifuge Binder Extractors
        • Filterless Centrifuge Binder Extractors
        • Solvent Recovery Unit
        • Binder Recovery Apparatus
        • TMSG (Rice) Apparatus
        • Marshall Apparatus
        • Skid Resistance & Friction Tester
        • Road Surface Irregularity Measurement
        • Benkelman Beam Apparatus
        • Sand Circle Apparatus
        • Dynamic & Kinematic Viscometers
        • Bacon Sampler
        • Flash Point Testers
        • Distillation of Cut-Back Asphalt apparatus
        • Determination of Solubility Set
        • Particle Charge Tester
        • Emulsified Asphalt Distillation Apparatus
        • Setting Tendency of Bitumen Emulsions
      • IPC Global Performance-Based Test Equipment >
        • Automatic Binder Extractors
        • Laboratory Mixers
        • Shearbox Compactor
        • Slab Roller Compactors
        • Cutting & Coring Machines
        • Wheel Trackers
        • Gyratory Compactors
        • Mixture Perfomance Testers
        • Universal Testing Machines
        • Modular Asphalt Testers
        • Stand-alone Testers
        • Dynamic Test Accessories
        • Binder Penetrometer
        • Rotational Viscometer
        • PAV & VDO
        • RTFO Ovens
        • Ductilometers
        • Ring and Ball Apparatus
        • Bending Beam Rheometer
        • Dynamic Shear Rheometer
    • Soil & Rock Mechanics >
      • Consolidation Apparatus
      • Shear Testing Equipment
      • Static Triaxial Systems
      • Dynamic Triaxial Systems
      • Resonant Column
      • Triaxial Cells
      • Rock Sample Preparation
      • Behavior of Joints
      • Rock Classification
      • Uniaxial & Triaxial Systems
      • Rock Permeability & Durability
      • Uniaxial & Triaxial Accessories
    • General Lab >
      • Ovens & Hot Plates
      • Balances & Weights
      • Thermometers & Hydrometers
      • Measuring Instruments
      • Laboratory Glassware
      • Porcelain, Plastic & Misc
      • Laboratory Hardware
      • General Purpose Equipment
      • Drying Test Chambers
      • Laboratory Fume Extraction
    • Universal Testers >
      • UTM - HPT Series
      • Automatic Computerized UTM
      • Cold Bend Testing Machine
      • UNIFRAME Universal Testers
  • NDM
    • NDM Troxler Gauges
    • NDM Survey Meter
    • NDM Shipping
    • NDM Training
  • Hire
  • Documents
  • News
  • Contact Us
    • Meet the Team
    • Join our Team