RING AND  BALL APPRATUS
IS: 1205 - 1985, IP : 58/63

The appratus is used to determine softening point of bitumen.Ring and ball appratus is used to determine softening point. It is that temprature at which a sample of bitumenous material loadede by a 9.5mm dia-steel ball, drops at the distance of 25mm.
Specifications : The appratus consists of steel braket with a sliding plate supporrt. That supports has two holes of 10mm dia on which a Ring and Ball guide can be kept.A centeral hole on this plate is for inserting thermometer.Supplied with a glass beaker approximate 8.5c.m. I.D., 12 cm high and a hand stirrer and nos. 9.5mm dia steel balls.

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RING AND BALL APPRATUS (ELECTRICAL)

Same as above but supplied with a thermostatic hot plate. Suitable for operation on 230 V.A.C.
Accessories :Thermometer IP60c range-2 degree celcious x 0.2 degree celcious.Thermometer IP61c range-30 degree celcious to 300 degree celcious x 0.2 degree celcious, Electrical Stirrer with stand and blades to gently stir the water in the beaker. Suitable of operarion on 230 V A..C.

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STANDERED PENETROMETER
IS :310,1203,1448, IP : 60, 49, 50,
ASTM : D5, D217, D637

Used to determine grade of bitumen. The penetration tests determinconsistency of bitumen for the purpose of grading. Depth is units 1/10 of millimeter to which a standered needel having a standered weight will penetrate vertically in a duration of five seconds at a temprature of 25 degree celcious determines penetration of gradation.
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 needel) slides on a pillar and can be clamped at any desired height. A rack and pinion and pointer assembel provides fine adjustment of needel or cone tip to sample. It incorporates a cluch mechanisum which makes reading of penetration and subsequent resetting a simple and accurate operation. The dial is graduated in 400 1/10 and the millimeter subdivision and the needle pointer against figures makes easy reading. Supplied with a bitumen penetration needle, ring weight one each 50 gms, and two sample containers.
Accessories : Penetration cone for empirical estimation of penetratioon of lubricating grease, petroleum jelly etc.

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AUTOMATIC STANDARD PENETROMETER

Same as above but supplied with transistorised timer and electro-magnet incorporated in the cluch mechanisum to accurately control penetration time to exact five five seconds.

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DUCTILITY TESTING APPRATUS
IS : 1028 - 1958, ASTM : D113, IP 32,55.

In flexibel pavement construction, bitumen binders are used. It is important that bitumenous meterial forms ductile thin film around the aggreates, which serves as a binder.The binder meterialnot of sufficient ductility renderspervious pavement surface and leads to devolopment of cracks. Therefore it is important to carry out the ductility tests on betumenus meterial. Ductility is defined as distance in cms to which a standard briquette to bitument can be streched before the thread breaks. The briquette is streched at a rate of  50mm/minute +/-2.5 mm per minute at a temprature of 27 degree celcious +/-0.5 degree celcious.
Specifications : The appratus consists of a water bath with a thermostatic heater, and a circulating pump to mantain uniform water temprature.One half of the briquette mouldsis fixed on a fixed palate in the water bath, the other half of the briquette mould is fixed to a carrier which slides over a rotating thread shaft with a cluch. The motor or 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 to 0 - 110cm x 1mm fixed on the bath with "0"(zero) of the scale towards the fixed plate slide. The rotating shaft has 2 speeds of travel for the bracket,5 cm/min.and1cm/min.,
selected by a cluch. Water bath is provided with a drain. A heater with thermostatic control is fixed inside the water bath. Control switches for motor, stirer, heater indicator lamps are fixed at a convenient place on the water bath, Completer with the three briquette moulds and one base plate,all made of brass.operates on 230 volts A.C., single phase.
Accessories : 1.Thermometer IP 38 c, range 23 degree celcious to 27 degree celcious 2. Ductility mould with base plate.    

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STRIPPING VALUE APPRATUS

For determining Stripping value of bitumenous mixes having aggregate size 1.0 mm to 75 microns.
Specifications :A circular tray rotates in a vertical plane at a rate
of approximately 100 r.p.m. by an electrical geared motor. 4 bottles
of approximately 400 cc are mounted on this circular tray at an angle of 90 degree to each with their mouth towards center of the tray. A time switch is provided.Suitable for operation on 230 volts A.C. single phase.

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BENKLEMAN BEAM

This device was devoloped by U.S. Bureau of Public Roads and is used to measure deflection of flexible pavements. The light weight instrument is supplied in two parts for assembling on site with easy hand tools.In use one end of the beam rests at a point under investigation while the beam is pivoted at the center. The free end carries a dial gauge to record the deflections. The other end is kept on a stable plateform . The beam ratio is 2:1 which nagnifies even small deflections. Supplied with a dial guage 0.01x25mm. This is a light weight dismantleable instrument and easy to carry.

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CENTRIFUGE EXTRACTOR(HAND OPERATED)
ASTM : D2172, AASHO: T-58, T-164.

This instrument is used for determination and checking of bitumen percentage in bitumenous mix, the mix is added with a solvent and dissolved bitumen is removed by centrifugal action.Consists of a removal aluminium rotor bowl, capacity 1500gms. with a cap and tightening nut.The bowl assembly is mounted  on a vertical shaft which protrudes from a cast housing. This shaft and thus the bowl is rotated fast mannualy by enclosed geares in the cast body and handle.Solvent is introdused during the test through the holes in the cap of the housing. a drain is provided to clooect disolved bitumen comming out of the rotating bowl and getting collected in the housing.

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CENTIFUGE EXTRACTOR(MOTORISED)

Same as above but shaft is rotated by an electric motor and gear. Care is taken to prevent solvent entering into the rorot of elecrical motor.Operates on 230 volts A.C. single phase.
Accessories : 1. Filter paper disc.(packet of 100 nos.)2.Benzene

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MARSHALL STABILITY TEST APPRATUS
ASTM : D 1559 - T - 62

Originally devoloped by Brause Marshall, a highway engineer in U.S.A. later on standerdised by ASTM. Generally the test is applicable to hot mix designs using bitumen and aggregates upto a maximum size of 25 mm. In this meatheod, the resistance to plastic deformation of cylindrical specimen of bitumenous mixture is measured when the same is loaded at periphery at 5 cm per min. This test procedure is used in designing and evaluating bitumenous paving mixes.The test procedures is extensively used in routine test programmes for paving jobs.There are two major features of the marshall meatheod of designing mixes namely.
a) Density - voids analysis b)Stability - flow tests.
The marshall stability of mix is defined as a maximum load carried by a compacted specimen at a standered test temprature of  60 degree celcious. The flow value is deformation the marshall test specimen under goes during the loading upto the maximum load, in 0.25mm units.In this test and attempt is made to determine optimum binder content for the type of aggregate mix and traffic intensity.
The appratus consists of : 1)A Loading unit motorised, capacity 5000kgf with two telescopic pillars and an adjustable cross head.Limit switches are fitted inside to control upwards and downwards movement of the pillars.On-off reversing switch and indicator lamps are on the front side while a hand wheel to manually move the pillarsis on the right. The load frame has fixed speed of 5.08cm, per minute.Operated on 230 volts A.C.
2)1 no. Compaction pedal with specimen mould holder.
3)2 no. Compaction Rammers,4.5 kg weight and free fall 45.7cm.
4)1 no. Breaking head assembly with provision to fix flowmeter.
5)3 no. Specimen mould 10.16cm I.D. x 7.6cm heigh with base plateand extension collar.
6)1 no. Kit for specimen extraction, consists of one each load transfer bar, steel ball, specimen extracting plate.
Accessories : (A) integral type proving ring capacity 3000kgs. (B)A dial gauge 0.01x25mm. (C)Universal water bath S.S. with ffalse bottom and pyramid shaped lid to accomodates 3 Nos. Marshall specimens. (D) Thermometer 0 - 250 degree celcious x 1 degree celcious     

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