Cement Concrete

JMT - 551
HYDRAULIC JACK CENTRAL HOLE TYPE CAPACITY 50 TONNES
Specification:
The hydraulic jack has a 25mm diameter hole going through the center. It is designed for dual direction and has a working stroke of approximately 22cm. A specially designed hand operated pumping unit is supplied for operation in both directions. A detachable handle is provided for operating the pump. The load is indicated on a 15cm dial hydraulic pressure gauge calibrated 0 – 50000 x 500 kg.
Note : Central hole jacks of other capacities can also be supplied on special request..

JMT - 553
COMPRESSION TESTING MACHINE
Strength of Concrete is a very important aspect during construction. Strength of concrete is obtained by crushing the specimen in form of cubes or cylinders. Concrete is carefully designed for a particular compressive strength by Engineers and specimen is tested by applying load in a compression Testing Machine.
‘JMTI’ manufacturers a range of Compression Testing Machines from 10 Tonnes to 300 Tonnes in different models. Portable models are very convenient and useful for site use where carrying frequently the specimens for testing in a standard laboratory is inconvenient and uneconomical. With special attachements, the machines can also be used for bricks, hallow or solid concrete blocks, using appropriate capacity machine.
In generala Compression Testing Machine consists of a Load Frame with suitable platens and a Pumping Unit with Pressure Gauge, either had operated or electrically-cum-hand operated. Load Frame and Pumping unit are connected by pressure pipes.

JMT - 554
PILLAR TYPE LOAD FRAME
These are two pillar type load frames. Two solid pillars are vertically fixed to a sturdy base and at other end is fixed a cross –head. The height of the cross head is also slightly adjustable. A lead screw passes through the center of cross-head. To the lower end of this lead screw is fixed upper platen with a spherical seat for self alignment. At the center of the base plate is fixed a jack, on the top of which the lower platen with the help of a centering pin is kept. The distance between the upper and platen is variable by means of the lead screw. A spacer block is also supplied with the load frame. This spacer block which can be fitted on the top of the jack and below the lower platen by means of centering pins helps reduce the distance between the two platens. The platens are well machined, polished and hardened. The lower platen has concentric grooves to centrally place the specimen. A dust cover for jack is supplied to prevent any grit going in the jack.

JMT - 555
COMPRESSION TESTING MACHINE
In these load frames "C" channels are used, they are welded at the top as well as bottom and with stand high loads. A hydraulic jack is fitted at the center of the base of the load frame, over which can be fitted lower platen and spacer block with the help of centering pin. A lead screw passes through the top of the frame. To the lower end of this lead screw is fixed the upper platen with spherical seat for self alignment. The platens are accurately machined, hardened and polished. The lower platen has concentric grooves to correctly place the specimen.
Note: The platens are normally circular in shape, but on special request square platens or rectangular platens can be supplied..

JMT - 556
HAND OPERATED PUMPING UNIT
This is a pumping unit double acting type with plungers of different diameters. The plunger having larger diameter pumps larger quantities of oil into the jack. Whereas the plunger having smaller diameter pumps oil in smaller quantities but effortlessly. These plungers are very accurately machined and fit in their respective cylinders with zero clearance, no seals are used. Special non-return valves are fitted in the pumping unit for trouble free long and effective service. A dip stick is provided on the pumping unit to ensure correct level of Hydraulic oil. On the front is fitted a release valve, which is also made to fix a pressure gauge on the pumping unit. These pumping units are connected to load frame by means of pressure pipes..

JMT - 557
CONCRETE TEST HAMMER (BIG)
It is similar to the above but is used for testing concrete with over size aggregates (for which test, cubes promise no reliable results) and for testing concrete roads. Its plunger is wider as such, the amount of concrete reached by the impact is considerably greater. With this model also the results obtained are within +/-20% of the actual compressive strength. The instrument is supplied with two handles which can be attached to the body of the concrete test hammer for carrying out the test easily. Complete with grinding stones.

JMT - 558
BRIQUETTE TENSILE TESTER (HAND OPERATED)
IS : 269 – 1950, BS 12
Used for making tensile strength test on cement briquettes.
Specifications :
The instrument is suitable for tensile tests upto 1200 Lbs or 540 kg. It is hand operated, with automatic loading by lead shots. Two calibrated scales 100 lbs x 1 lb, and 50kg. X 0.5kg. are engraved.
Supplied complete with one brass briquette mould with base plate, lead shots 15 kgs. weights to weight 50 kg., 100kg. 150kg. and 200 kg..
Spares: Lead shots & Briquette mould brass with base plate..

JMT - 559
TENSILE STRENGTH TESTER
(ELECTICALLY OPERATED) IS : 269 – 1958, BS 12.
The instrument employs a friction – free, accurate, double level system, the load being applied by means of sliding weight on the top level. The capacity of the unit is 900kgs. After fixing the briquette in the jaws, the machine s switched on. The sliding weight slides over the calibrated level thus applying tension to the specimen. A micro-switch fitted instantly stops the machine on failure of the briquette and on failure the tensile load is accurately read to 0.5kg. by means of a marker provided on the sliding weight. The machine can be made operatable for subsequent test only after the sliding weight to its zero position.
Suitable for operation on 230 volts, 50 cycles, single phase, A.C. supply.
Complete with one brass briquette mould and one base plate.

BACK