This method is used for determining the ductility of bituminous / asphaltic materials by measuring the elongation before breaking when two ends of a briquette specimen are pulled apart at a speed of 50mm/min ±25mm per mount at a temperature of 25c ± 0.50c. Specifications: The apparatus consists of a water bath with a digital temp. Controller cum indicator, and a circulating pump to maintain uniform water temperature. One half of the briquette moulds is fixed on a fixed plate in the water bath, the other half of the briquette mould 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 0-110 cm x 1mm fixed on the bath with “0” (zero) of the scale towards the fixed plate side. The rotating shaft has 2 speeds of travel for the bracket, 5cm/min and 1 cm/min. Selected by a clutch. Water bath inside is stainless steel with an insulation and a water drain. A heater with digital temp. Controller cum indicator is fixed inside the water bath. Control switches for motor, stirrer, heater and indicator lamps are fixed at a convenient place on the water bath. Supplied complete with three ductility moulds and one base plate. Operates on 230 volts a.C. Single phase.
