General Description

This compression jig is strictly compliant to ASTM D7012 Rock core specimens Test Methods, in particular the spherical seat / compression plates / spe...
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Description

This compression jig is strictly compliant to ASTM D7012 Rock core specimens Test Methods, in particular the spherical seat / compression plates / specimen diameters’ ratios fall within the prescriptions.
The Rock core should have a diameter from 54.7 mm (NX type) to 63.5 mm (HQ type).
 
It consists of a heavy duty twin-column frame, a spherically seated upper platen hold by calibrated springs and a lower platen centred on the frame base. The high stiffness structure and the high performance steel of the spherical seat make this device particularly suitable for high strength rock specimen featuring brittle properties and explosive failure.
It shall be preferably fixed on the compression machine piston head by the threaded pin included in the supply compatible with all CONTROLS compression frames / machines.

 

Products

Code
Description
Units

Technical Specifications

  • Max. loading capacity: 1,200 kN
  • Platens dia.: 80 mm
  • Platens hardness: ≥ 58 HRC
  • Loading head stroke: 66 mm
  • Vertical clearance: 167 mm
  • Supplied with distance pieces to reduce the vertical clearance: 2 pcs. h 30 mm and 1 pc. h 22 mm
  • Overall dimensions: 249 mm dia. x 333 mm height 
  • Weight: 30 kg

 

Standards

  • ISRM
  • ASTM D7012