Code: CEST181

Total stresses when measured in a triaxial cell are more complex in their nature. Numerous parameters may be me measured including back, pressure, pore water pressure and volume change. From these values various engineering properties can be calculated.

Triaxial cell is used to apply total stress. The sample is subjected to and all-round confining pressure. Load is then applied through piston of triaxial cell on a pressure pad on the top of the specimen. In a triaxial cell, sample is confined in a rubber membrane. Brand Triaxial Cell are manufactured from carefully selected material. The cells are manufactured to accommodate different sizes of specimen Universal Triaxial Cell accommodates samples of diameters 38 mm to 100 mm.

Code: CEST184

Suitable for testing 38mm, 50mm, 75mm and 100mm. diameter specimens. The equipment comprises the following:

Perspex cell with anvil and loading plunger. The cell can be easily opened by releasing the nuts and is leak proof upto 10kg/cm.sq. fluid pressure. An oil plug which can also be used as an air vent is provided for introducing a thin layer of oil over water. This provided effective sealing at he plunger for long duration tests. The cell is fitted with four sleeve packed valves of no volume change type on the base.

Brass Pedestals for 38mm, 50mm, 75mm & 100mm dia specimen. Perplex loading pads for 38mm, 50mm, 75mm, & 100mm dia. specimen pairs of plain discs, 38 mm, 50mm, 75mm & 100mm dia. Pairs of porous stones one each for 38mm, 50mm, 754mm and 100mm dia. samples. Split sand formers for 38mm, 50mm, 75mm, & 100mm dia. specimen. Sheath stretchers for 38mm, 50mm, 75mm & 100 mm dia. specimen. One dozen rubber sheaths each for 38 mm, 50mm, 75mm & 100mm dia. specimen. For rubber '0' rings each for 38 mm, 50mm, 75mm, & 100mm dia. specimen. Set of four slotted ring spacers for sand formers and four pairs of polythene drainage tubes.

Code: CEST187

This apparatus is used for measuring pore water pressure and pore air pressure in soils. This is as per the principal outlined in the book "Measurement of soil properties in triaxial tests" by A.W. Bishop and D.J. Henkel. This is used as an accessory for triaxial test apparatus.

Specifications: The apparatus consists of a panel for wall mounting on which are fitted -1.0 to 10

Manometer: Glass U-tube manmeter for measuring low positive pore pressures negative pore pressures and checking zero error of pressure gauge. It is provided with a mercury trap (Mercury supplied at extra cost. Null indicator made out of clear transparent Perspex with mercury trap and cursor to indicate the mercury level.)

BURETTE: 50ml Burette for measuring the volume change in the soil specimen. Pressure pump fitted with four sleeve packed valves, Operated by means of a hand wheel on the end of the piston rod which is threaded through the pump cap and gives a smooth, fine adjustment of pressure. Copper coil and water reservoir. The unit is tested against leaks upto 10kg/cm sq.

Code: CEST190

Same as above, but fitted with pressure gauge 0-20 kg/cm x 0.2kg/cm2

Spares: Polythene tube 3 mm bore x 5 mm. O.D

Code: CEST193

For trimming various diameter specimen for triaxial and unconfined compression tests.

Specifications: The lower specimen grip is mounted on a disc which rotates freely. The soil sample is mounted on the lower specimen grip and the upper grip is firmly seated on top of the specimen. The vertical guide can be adjusted to control the depth of cut. While trimming the lower disc is rotated by hand. Supplied complete with a wire saw, trimming knife, pairs of gripper plates for 38mm dia, 50mm dia, 75mm dia & 100mm dia specimen.

Code: CEST196

This device is used to maintain cell pressure constant for a long duration and the system can be used in place of conventional constant pressure system using mercury pots where certain minimum heights are required. Problems like deairiation of pump, leakage of mercury etc. are eliminated in this system. This unit is smaller in volume and cab be used in mobile Laboratory also. This can maintain pressure in the cell upto 20kg/cm sq. Pressure is maintained constant in the system by a balancing calibrated weighs on a spindle against a column of oil, Operating under constant feed back.

Construction: The system consists of an oil pump continuously driven by an electric motor during the test period. The internal components are housed in a strong compact housing. The piston on which weights are kept rotates with minimum friction A transparent Oil water vessel is provided to transmit pressure to the cell. A hand pump provided facilitates priming and to maintain constant pressure during power failure. 2 2

Specifications: Range 0-20 bar (0-20 kg/cm ) Steps of pressure 0.5 bar (00.5kg/cm ) Accuracy + 0.5% Electric Supply 230Volts, Single Phase, 50Hz, A.C. Supplied complete with Pressure Gauge, flow valves, 2 connecting Pressure hose and set of weights to give maximum pressure of 20 bar (20kg/cm)

Code: CEST199

When conducting triaxial tests on soil samples, it is observed that due to internal pressure, the cell expands, soil specimen consolidates resulting in the change of volume change Gauge is therefore devised to accurately measure volume changes. This is measured by observing the quantity of water entering or leaving the cell as the cell pressure and axial load are changed it is achieved by the displacement of free surface between the water supplied to the cell and another fluid (Paraffin of kerosene). A dye is added to the paraffin for clear demarcation of the interface. The unit consist of a glass graduated tube of the appropriate capacity graduated to parts of a ml. enclosed in a perpex tube sealed by two end caps. The unit is fitted with manifolds and valves which enable it to be sued with the triaxial cell and the constant pressure (Mercury controls) system. The cell pressure can either be directly applied to the cell from the constant pressure system or through the volume change gauge. The graduated glass tube is not subjected to any difference in pressure and its inside is coated with a layer of silicon water repellent to reduce the error in meniscus. There is an arrangement for filling the unit with water and paraffin and a drainage valve is provided in the lower end cap. The whole assembly is mounted on a panel suitable for wall mounting. The unit is supplied complete with a pressure hose with end couplings and a packet of dye.

Code: CEST202

Remoulded Compacted soil, when soaked in water, absorbs and swells. Swell Test Apparatus is designed to determine the swelling pressure developed by soil specimens molded to desired densities at known moisture contents.

Specifications: The outfit comprises the following: One loading unit, hand operated 5 tons capacity with two rates of travel. One high sensitivity Proving Ring 250kg. capacity with calibration chart and carrying case. One Dial gauge 0.01mm x 25mm. One Gun metal mould 1000ml. capacity. (100mm dia. x 127/3mm high) with collar and base plate and pair of porous stones 100mm dia. x 12.7mm thick. One Gun metal/brass perforated swell plate 100mm dia x 16mm thick. One spacer 100mm dia. x 12.7mm thick; one load transfer bar and one steel ball. One soaking tank 250mm dia x 210mm high.

Code: CEST205

As Per IS: 2270 (PART-XVI)

Specifications: The equipment consists one each of the following: load frame, Hand operated, Capacity 5000kg. with high and low rates of travel of the lead screw. Mould made from Gun0metal/Brass, 150mm internal dia. x 175mm high, with perforated base plate and extensioncollar 50mm high. Penetration piston, face dia. 50mm with adjustable bracket for penetration dial gauge. Circular metal space disc, 148mm dia. x 47.7mm high. With detachable handle. Annular metal weight, 2.5k., 147mm dia. with 53mm dia. central hole. Slotted metal weight, 2.5kg. 147mm dia. with 53 dia. slot. Perforated plate made of Gun-metal/Brass 148mm dia. with adjustable stem and lock nut and a metal tripod for dial gauge. Cutting collar. Rammer 2.6kg weight with drop of 310mm. Rammer 4.89kg. with drop of 450mm. Supplied proving ring and dial gauge.

Code: CEST208

As Per IS: 2720 (Part-XVI)

Similar to above but supplied with bench mounting type 5000kgf. Capacity load frame motorized, in place of load frame hand operated. The lead screw of the load frame has a single constant rate of travel of 1.25mm/minute. Accessories for Laboratory C.B.R. Apparatus: High sensitivity proving ring 300kg. capacity with calibration chart and carrying case. Dial Gauges, 2Nos. 01mm x 25mm. Annular metal weight 5kg 147m dia. with 53mm dia. central hole. Slotted metal weight, 5kg. 147mm dia. with 53mm dia, slot. Note: Proving Rings of other capacities are also avaiLable.

Code: CEST211

As Per IS: 2720 (Part- XXXI) 1969

In recent years it has become important to know C.B.R. Values in situ. It is useful in determining the load carrying capacity in the field when in-place density and water contents are such that the degree of saturation in 80% or greater, when material is cohensionless and coarse grained, such that it is not effected by changes is water contents and when the material has been in-place for considerable time. The loading is effected by means of a mechanical load farms which can be fixed to the under side of a truck.

Specifications: Mechanical screw loading jack, 10,000kg. capacity with U-bracket and swivel head. Penetration piston, 50mm dia.threaded at eh upper end. Extension rods consisting of 2 lengths 5cm. 2 lengths 10cm., 1 length 30cm., 1 length 50cm., 1 length 10cm., used as spacers between the proving ring and penetration piston. The lengths are machined from steel tubing Connector set, has eight connectors for coupling the penetration piston a nd proving ring assembly either directly or through extension pieces. Dial gauge support of seamless pipe construction. It stands 30cm hig and 45cm wide at eh base. Provided with a quick release screw type-clamp capable of sliding and locking anywhere along 2 meter length of the bridge. Supplied with annular metal weight 5kg., 250mm dia. with 53mm dia. central hole, slotted metal weight 5kg., 215mm to 250mm dia. with 53mm dia. slot, 2Nos. Slotted metal weights, 10kg, 25mm to 250mm dia. with 53dia slot 2Nos.

Accessories: Dial gauge 0.01mm x 25mm. High sensitivity Proving Ring 5000kg capacity with calibration chart and carrying case.

Code: CEST214

Load Frames are used to apply on the test specimen. The capacity and speed depends on the requirement of a particular test. Load Frames are used in C.B.R. Triaxial, Unconfined Compression Test etc. Load Frames are avaiLable in various models. The rate of loading is constant in electrically operated Load Frames and Load Frames with multi strains are also avaiLable.

Code: CEST217

Specifications: The Unit is designed for a maximum load of 5000kg. and consists of a two speed screw jack mounted in a frame with identical top and base channel pieces so that the unit can be placed either way up and the device can be used for loading from above of from below whichever is convenient. This is a floor model.

Code: CEST220

Specifications: Same as above but provided with 3 rates strains 1.25mm/min., 1.5mm/min. & 2.5mm/min.

Code: CEST223

Specifications: It consists of a cabinet which houses the electrical motor, reduction gear and the turret gear box. The loading is done by the upward movement of the lower platen of approx. 198mm dia. which is firmly fixed to the lead screw. When the lever is set in the neutral position, it isolates the lead screw from the rest of the drive mechanism and the lead screw can be manually moved up or down by operating the handle. The various rates of strain that can be obtained are as follows.

Code: CEST226

As Per IS: 8764, 1978.

Used for testing rock, aggregate and core samples as well as out crop specimen in their original shape. Very useful for rock classification. This is a portable instrument and is useful in the field also. Uniaxial compressive strength for rock specimen can be predicted approximately.

Specifications: The instrument comprises of:- A three pillar type load frame on the base of which at the centre is fixed a 10 tone capacity hydraulic jack. With a conical platen at the top of jack. The other conical platen is fixed to the top plate of the frame at its centre. The distance between two conical platens is adjustable by vertical movement of the upper plate of the load frame. Loading jack with integral hand operated pump and a pressure gauge 0-2500kg. x 25kg.

Optional: Pressure gauge 0-10000kg. x 50kg.

Code: CEST229

The instrument is useful for testing specimen from 50mm dia. to 100mm dia. and of thickness of half the diameter.

The specimen is held in circular jaws, this is primarily similar to a compression Machine and consists of a small load frame having sturdy base with two vertical threaded rods and an adjustable cross head. The hydraulic jack is fitted at the center of the base of the load frame. The jack of the load frame is self retracting and two plain platens are supplied.

A pressure gauge capacity 0-200KN x 2KN is fixed at the base of jack. A maximum pointer is also provided on the gauge a pair of semi-circular platens for 50mm dia, samples also

provided. This instrument can be used in field also.

Optional Extras: Pairs of jaws for sample dia. (a) 60mm (b) 70mm (c) 80mm (d) 90mm (e) 100mm.

Code: CEST232

As Per IS: 2131-1963 & 9640-1980.

This is used for Standard Penetration Test. For determining penetration resistance (N Value) of soil which can be related to unconfined Compressive strength, Penetration resistance (N Value) of soil is determined by giving a number of blows with a 65kg weight falling through a given distance of 75cm required to penetrate the assembly to a depth of 30cm, when properly seated on the ground.

Specifications: The sampler is made from a steel tube split lengthwise and held together by a head fitted with a ball check valve and a hardened steel shoe of inside cutting edge of 35mm dia. The sampler is 35mm I.D. and 50.8mm in outer diameter and 508mm/long. One adaptor to connect 'A' type drill rods is also supplied.

Code: CEST235

Specifications: Same as above but the diameter is increased to accommodate a brass liner. Complete with brass liner.

Spares: Body, shoe & Head of split spoon sampler. And Brass liner.

Note: The above outfits can also be supplied in FPS Units in conformity with ASTM D 1586-64T (Penetration test and split barrel sampling of soils)

Accessories: Drive weight 65kg. with chain. IS: 2131-1963. Drive pipe assembly with two end caps of mild steel to give a fall of 75cms for drive weight.

Code: CEST238

This can be used in drilling operations to increase the footage and improved job safety. Specifications Consists of three metal pipe legs approximately 5 meter long connected by a tie bolt. Each leg is made of two parts for ease of transport. Complete with one pulley. One leg has built in ladder.