Ductility Testing Machine

 Ductility Testing Machine  :  Ductility Testing Machine is defined as distance in cms to which a standard briquette of bitumen can be stretched before the thread breaks. The briquette is stretched at a rate of 50 mm/min. +/-2.5 mm per minute at a temperature of 27 deg.C +/-0.5 deg C. The apparatus consists of water bath with a thermostatic heater, and a circulating pump to maintain uniform water temperature . one half of the briquette molds is fixed in a fixed plate in the water bath, the other half of the briquette mold is fixed to a carrier which slides over a rotating threaded shaft with a clutch, The motor and gears to rotate the shaft are housed in a cabinet fixed above the other end of the bath. A pointer fixed to the carrier moves over. a scale graduated from 0-100 cm x 1 mm fixed on the bath with "0" (Zero) of the scale towards the fixed plates side. The rotating shaft has 2 speeds of travel for the bracket, 5 cm/min. and 1 cm/min. selected by a clutch. Water bath inside is of stainless steel with insulation and water drain cock . A heater with thermostatic control is fitted inside the water bath. Control switches for motor, stirrer, heater and indicator lamps are fixed at a convenient place on the water bath. Complete with three briquette molds and one base plate.