BOHME TESTER

The instrument measures a volume loss in a specimen under abrasion test and it's used in tests such as:
- paving stones
- concrete slabs
- slabs made of natural rocks
- natural stone slabs
The test is performed by positioning a specimen to be verified in a abrasion tester Böhme apparatus on the test track on which has been spread normalized abrasive; the grinding wheel it's made rotate and the specimen submitted to the abrasive load of 294 N for a certain number of cycles.
Before doing a test, establish the specimen’s bulk density by measuring
weight and thickness.
Perform the test for 16 cycles composed of 22 turn each, calculating
at the end a worn as a average loss in volume and weight.
The apparatus is basically composed of:
- cast iron horizontal disc with a speed of 30 rpm and a diameter
of 750mm furnished of a 200mm test track to position a specimen.
- Control panel with digital revolutions counter with automatic stop after preset revolutions
- Specimen’s holder