Micro-Deval Apparatus

The Micro-Deval is used to test the resistance of fine/coarse aggregates to degradation by abrasion.

This testing of fine/coarse aggregates determines their abrasion loss in the presence of water and an abrasive charge. Test results are helpful in judging the suitability of fine/coarse aggregates subject to weathering and abrasive action when adequate information is not available.

Principe of operation:

A pre-soaked aggregate sample is placed in the jar with a fixed volume of water and a fixed quantity of 9.5mm S.S. balls. The unit is then put into rotation for a known period of time. The period of time depends on the initial grade of the sample. At the end of the cycle, the sample is removed and the aggregate quality is determined by the percentage of loss by gradation.

Included
Micro-Deval apparatus (1, 2, or 3 tier) 115V 60 Hz 1 ph (other voltages available up on request) Stainless steel jar(s) (1, 2 or 3) capacity: 5.03 litres 9.5mm stainless steel balls (5.5, 11 or 16 Kg) 24 hour Digital timer / controller• Magnet to remove S.S. balls