Ductility Testing Apparatus For Testing Lab Description and Specifications for Lab Tenders
In
flexible pavement construction, bitumen binders are used. It is
important that bituminous material forms ductile thin film around the
aggregates,.
Bitumen-Asphalt Testing Lab equipment manufacturers,exporters and Bitumen-Asphalt Testing Lab suppliers Which serves as a binder. The binder material not of
sufficient ductility render spervious pavement surface and leads to
development of cracks. Therefore it is important to carry out the
ductility tests on bituminous material. 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 50mm/minute
±25mm per minute at a temperature of 27ºC ± 0.5ºC.
Salient Features:
The
apparatus consists of a water bath with a thermostatic heater, and a
circulating pump to maintain uniform water temperature.
One
half of the briquette molds is fixed on 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 0-110 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 aluminum, it is an insulated water bath. Water bath is
provided with a drain. A heater with thermostatic control 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,
complete with three briquette molds and one base plate, all made of
brass. Operates on 230 volts A.C. single phase.
Accessories :
Thermometer IP 38 C, range 23ºC to 27ºC.
Ductility mould with base-plate.
civil lab equipments manufacturers