|Ductility Testing Machine (Refrigerated) :
Ductility Testing Machine (Refrigerated)
With refrigeration system and micro-processor based digital temperature controller.
Ductility 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.± 2.5mm per minute at a temperature of
27°C ± 0.5°C.
The Machine is having built in refrigeration system to work a below
ambient temperature up to 10°C in tropical conditions. The Machine will
operate at 27°C with control accuracy of ± 0.5°C.
The apparatus consists of water bath with a heater, and a circulating
pump to maintain uiform water tempetature . one half of the briquette
moulds is fixed in 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 0-100 cm x 1mm
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 1cm/min. selected by a clutch. Water bath inside is of
stainless steel with insulation and water drain cock . A heater with is
fitted inside the water bath. The Temp. is controlled by dual display
Microprocessor based Auto Tuning PID Digital Temp. indicator cum
controller. Control switches for motor, stirrer, heater and indicator
lamps are fixed at a convenient place on the water bath. Complete with
three briqutte moulds and one base plate, All supply single phase.