This instrument is used for determination and checking of bitumen percentage in bituminous mix, the mix is added with a solvent and dissolved bitumen is removed by centrifugal action. Consists of a removable aluminum rotor bowl, capacity 1500 gms. This shaft and thus the bowl is rotated fast manually by enclosed gears in the cast body and handle. Solvent is introduced during the test through the holes in the cap of the housing. A drain is provided to collect dissolved bitumen coming out of the rotating bowl and getting collected in the housing.
Salient Features ::
CENTRIFUGE EXTRACTOR (MOTORISED) :
Same as above but shaftis rotated by an electric motor and gear. Care is taken to prevent solvent entering into the rotor of electrical motor. Operates on 230 Volts A.C. single phase.
Accessories : 1. Filter paper disc (packet of 100nos.) 2. Benzene
Specifications : 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 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 aluminium, 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 moulds and one base plate, all made of brass. Operates on 230 volts A.C. single phase.
This apparatus is used to determine softening point of bitumen. Ring and ball apparatus is used to determine softening point. It is that temperature at which a sample of bituminous material loaded by a 9.5mm dia steel ball drops at a distance of 25mm.
Specifications : It consists of a vertical pillar mounted on a base provided with levelling screws. The head, together with dial plunger rod and cone (or needle) slides on a pillar and can be clamped at any desired height. A rack & pinion and pointer assemble provides fine adjustment of needle or cone tip to sample. It incorporates a clutch mechanism which makes reading of penetration and subsequent resetting a simple and accurate operation. The dial is graduated in 400 1/10 and the millimeter sub-divisions and the needle pointer against figures makes easy reading. Supplied with bitumen penetration needle, ring weight one each 50 gms, and two sample container.
Pumping Unit : The motorized pumping unit which is housed in an elegant console is of double plunger type and is driven by 3 phase 440 volts 50 cycles electric motor. The pumping unit is separate unit connected to the jack by means of a steel connecting tube. A junction box is suitably fixed to connect the motor to the mains through a push button starter. The pumping unit is fitted with gauges. A maximum pointer is provided to facilitate taking of the reading after failure of the specimen. The pressure gauges are fixed on the pumping unit at an angle for easy readability.The machine is fitted with a hand wheel control which enables the rate of application of load to be varied. The machine is also equipped with facilities for hand pumping in case of power failure. The electric pumping unit is fixed with a micro-switch off the motor automatically as the load on the machine approaches the rated capacity. Relays are also incorporated in the pumping unit so that in the case of break-down of power supply, the motor will stop and would not-re-start unless starting switch is operated.
Laboratory Mixer for mixing of Bitumen for making different types of test specimens in the laboratory. The apparatus comprises the following: (I) A motor driven mixer which simultaneously imparts two motions to the mixing paddle i.e. revolving and planetary. A two speed gearbox is incorporated in the drive which makes the paddle revolve at approximately 140 and 285rpm with corresponding planetary motion of 62 and 125rpm respectively. (II) A stainless steel mixing paddle of the specified shape and dimension witch can be attached or removed easily. (III) A stainless steel mixing bowl of about 6Ltr capacity fitted with Heating Jacket for Heating of Sample at the Bottom of bowl with the thermostat controller. The mixing bowl can be held with the mixing apparatus and its height is adjustable. Suitable for operation on 220V, 1Ph, 50Hz AC Supply
Specifications : The apparatus consists of an epicyclic type stainless steel paddle imparting both planetary and revolving motion, by means of gears. It has two speeds of 140 + 5 r.p.m. and 285 + 10 r.p.m. with planetary motions of approximately 62 r.p.m. + 5 r.p.m. and 125 r.p.m.+/-10 r.p.m. respectively. The stand of the mixer has arrangement to raise or lower the bowl. Complete with stainless steel bowl of about six litres capacity. Suitable for operation on 230 volts, 50 cycles, single phase, A.C.supply.
Concrete mixer laboratory type, electrically operated. Designed to remove the burden- some work of hand mixing. Uniform thoroughly mixed batches can be produced. The counter balanced drum is easy to tilt 1.1/2 to 2cu.ft.mix. The total drum volume is however 3cu.ft. Mounted on a sturdy rubber tyred stand, and the drum is mounted for end discharge and equipped with end towing pole. Equipped with ½ h.p. electric motor. Suitable for operation on 220/230 volts A.C. single phase.
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