The anode CO2 and air reactivities are measured with the RDC-146 and RDC-151 equipment respectively. After cooling down to ambient temperature, any loosely bound particles on the residual sample have to be removed to quantify the dusting propensity.
The removal of the loosely bound particles is conducted with the RDC-181 apparatus, where the residual core sample is tumbled with steel balls for a given number of revolutions. RDC–181 is available with 2 or 6 tumbling units.