this is a slate durability apparatus used to measure the Slate durability index of rocks around 8 to 10 Rock specimen each waging uh 40 to 60 G giving a total weight of 450 to 550 g are selected uh to represent the sample the wgs of the Clean dry and empty drum or recorded SD and uh the selected specimen are placed in the drum and D to constant weight at a temperature of 100 and 5° C for 3 until to 12 hours after drying in the oven the drum assembly for each desk is waged and recorded
the drum are then place in the related water tank and couple in the series to the motor drive units the tank is filled with slaking flu normally uh we we use tap water at a constant uh temperature of 20° C to a level of 20 mm below the drum exis summing almost half the drum the test is immediately set in motions where the drums are rotated for 20 Revolution during a period of 10 minutes [Applause] at the end of the period of the drive is immediately Switched Off the drums remove from the tank and the
assemblies with the specimen are dried in the oven at the temperature of 105° C the mthods of the OV dried drums and specimens are recorded I
