Transportation or Highway Testing Lab Equipment

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Test Lab Equipment in Civil Engineering Test Lab Equipment

Standard Penetrometer Apparatus

As per IP 49, 50 & 167 specifications &

also as per is 1448 (p: 60) & (p: 93)

this apparatus is used for penetration test on a wide variety of materials. It consists of a head support mounted on a vertical rod which can be adjusted for height. A rack and pinion and pointer assembly provides fine adjustment of needle tip to sample and in corporate a slipping clutch mechanism which make reading of penetration and subsequent resetting a sample and accurate operation. The dial graduate from 0-400 in one tenth millimeter sub-division. The instrument is supplied with two sample containers & 2 wts.

Softening Point App. / Ring And Ball Apparatus

As per IP: 58 & IS:1205-1958

Also called as Ring & Ball Apparatus. This apparatus is meant for determination of softening point of bituminous materials according to IP 58 and IS 1205. Softening point is that temperature at which the specimen under test becomes soft enough to allow a steel ball of specific dimension to fall a required distance under test condition.

Specification:-

The apparatus consists of Glass beaker of heat resistant glass having internal diameter of 8.5 cm X 12 cm depth (approximately), two steel balls each of 9.5 mm diameter, two tapered brass rings, two ball guides, ring stand and a hand stirrer

Electrically Operated -Same as above with F.H.P. electric motor driven Stirrer and electric heater with Energy Regulator Control

Aggregate Crushing Value Apparatus

As per IS: 383

This apparatus is used to measures resistance of an aggregate to crushing under a gradually applied compressive load.

Specification:-

M.S.Cylindrical container 150 mm ±0.5mm dia x 130mm to 140mm high with base plate 200 to 230 mm./sqr x 6mm thick.
A plinger of 148mm ± 0.5mm dia x 100 to 115mm high.
Tamping rod, 16mm dia x 600mm long, one end rounded.
Metal measure 115 ± 0.5mm dia x 180 0.5mm high.

Aggregate Impact Tester

As per IS: 2386 (IV) 9377

This Apparatus is used to determine aggregate impact value of coarse aggregate. The hammer of the tester fall freely from 380 mm height on coarse aggregate for 15 times/15 sec.the crushed aggregate removed from the cup ,then sieved and weighed. The % ratio of the weight passing 2.36 mm sieve and weight of oven dried sample is Aggregate Impact value.

Specification:-

The instrument consists of a circular base with two vertical guides.
The hammer of weight 13.75 ±0.25 kg can be raised to fall freely down the vertical guides.
The height of fall can be adjusted through 380 ± 5mm.
The hammer is provided with a locking arrangement.
The hammer falls freely to the base and is removable for emptying. Supplied complete with metal measures 75mm dia x 50mm high (for specimen preperation) and
Tamping rod 230mm long x 10mm dia.

Ductility Testing Apparatus

In flexible pavement construction, bitumen binders are used. It is important that bituminous material forms ductile thin film around the aggregates, which serves as a binder. The binder material not of sufficient ductility renderspervious pavement surface and leads to development of cracks. Therefore it is important to carry out the ductility tests on bitumenous 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.

Specification:-

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 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,
3 briquette moulds and one base plate, all made of brass.
Operates on 230 volts A.C. single phase.

Buoyancy Balance

Buoyancy Balance helps in determining the specific gravity and for the water absorption of the aggregate. It is fitted with the 15 kg capacity x 0.5 gm of the electronic balance. The frame is supplied with:

• Water tank,

• Suspension hook

• Lever for lifting the water tank manually

Los Angels Abrasion Testing Machine

Used for testing crushed rock, crushed slag, crushed and un-crushed gravel for resistance to abrasion.

Specification:-

The machine consists of a hollow cylinder mounted horizontally on a sturdy frame on ball bearings. There is an opening which can be closed with a dust tight cover to facilitate charging and discharging the drum with the material under test. A detachable shelf which extends throughout the inside length of the drum which catches the abrasive charge and does not allow it to fall on the cover. The drum is rotated by an electric motor through a heavy reduction gear at a speed of 30-33 r.p.m. A revolution counter is fitted to the frame. A tray is supplied for collection of the material at the end of the test. Complete with abrasive charges consisting of a set of twelve hardened steel balls, approximately 48 mm Dia. Suitable for operation on 440 volts, 3 phase, 50 cycles, A.C. supply

Marshall Stability Test Apparatus

The test is applicable to hot mix designs using bitumen and aggregates upto a maximum size of 25mm. In this method, 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 procedure is extensively used in routine test programmes for paving jobs. There are two major features of the marshall method 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 standard test temperature of 60ºC. The flow value is deformation the marshall test specimen under goes during the loading upto the maximum load, 0.25 mm units. In this test and attempt is made to determine optimum binder content for the type of aggregate mix and traffic intensity.

Specification:-

The apparatus consists of :-
A loading unit motorized, capacity 5000 kgf with two telescopic pillars and an adjustable cross head. Limit switches are fitted inside to control upward or downward movement of the pillars. On-off reversing switch and indicator lamps are on the front side while a hand wheel to manually move the pillars is on the right. The load frame has fixed speed of 5.08 cm per minute. Operated on 230 Volts A.C.
1 No. Compaction pedal with specimen mould holder.
2 Nos. Compaction Rammers, 4.5kg weight and free fall 45.7cm.
1 No. Breaking head assembly with provision to fix flowmeter.
3 Nos. Specimen mould 10.16cm I.D. x 7.6cm high with base plate and extension collar.
1 No. Kit for specimen extraction, consists of one each load transfer bar, steel ball, specimen extracting plate.
Accessories :
Integral type Proving Ring capacity 3000 kgs.
A dial gauge 0.01 x 25mm
Universal Water Bath S.S. with false bottom and pyramid shaped lid to accomodates 3 Nos. marshall specimen
Thermometer 0 - 250ºC x 1ºC

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