Test Standard Category

C381 Rock classification hammer

( Concrete Aggregates-Rocks )

  • ASTM D5873
  • ISRM
  • EN 12504 PART 2
  • ASTM C805
  • DIN 1048
  • BS 1881:202
  • NF P18-417


This impact hammer is used for rock classification test. The core rock specimen normally NX 54.7 mm diameter is held on a special cradle (accessory) in horizontal position, and the hammer tests the same in all its length, to obtain an average of the readings.

Impact energy: 0.735 Joule (Nm)
Measuring range: 10...60 N/mm²
Weight: 2 kg

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