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Cement / Concrete Testing

CEMT 1011
Concrete Test Hammer
The concrete test hammer is an instrument, which is easy to use, for quick and approximate measurement of the resistance to pressure of manufactured concrete products. The principles on which it works are based on the rebound impact of a hammer on a piston, which rests against the surface of the concrete products. The Greater the resistance of the concrete, greater is the rebounded impact. By reading this rebound impact on a scale and relating it to curves on graphs supplied with the instrument, the resistance to compression in MPa or PSI can be found, with 20% of actual.
Consists of a barrel in which is housed a hammer mass attached to an impact spring which slides on a guide bar. A plunger is attached to the guide bar, which is pressed against the surface to be tested. As the piston is pressed against the surface to be tested, on reaching the compressive strength, the hammer mass is released and rebounds to a certain extent (according to the strength of the surface) which is indicated by a rider on a calibrated scale. A lock button fixed on the body of the hammer, locks the rider in place and the rider can be recared to zero position by using the same button. The equivalent compressive strength can be computed from the chart supplied. Each hammer is calibrated against at standard test hammer, and is suitable for specimen of compressive strengths 100 - 700 kg/cm. The instrument, complete with a grinding stone for polishing the test surface, is supplied in carrying case.
CEMT 1012
Demountable Mechanical Strain Gauge
It is used for finding out the linear deformation caused on two reference points fixed on a loading member. This portable gauge is designed for a gauge length of 20cm. of the reference pins. The deformation is indicated by a 0.002 x 10mm dial gauge attached to the instrument. Complete with two standard bars for 20cm gauge length supplied in a wooden case.
Accessories: Reference pins in packet of 10 Nos.
CEMT 1013
Flexure Testing Machine (Motorized) Rilem - Cembureau Test
It is used for testing 40mm x 40mm x 160mm mortar specimens for flexural strength. (Rilem Cembureau Test) by single point loading.
It is a motorized, mechanical unit. The speed is adjusted so that the load increase on the specimen is between 4 to 6 kg/sec. A flexure test attachment for keeping the specimen in position is also supplied. This consists of two rollers 10mm. diameter and spaced 100mm apart, and a third roller of the same diameter equidistant from the first two and for transmitting the applied load to the opposite face of the prism. The unit is for operation on 230 Volts, single phase, 50 cycles A.C. supply. Loads are measured on a proving ring fitted with a sensitive dial gauge. Supplied without proving ring.
Accessories: Proving ring, capacity 500 kN.
CEMT 1014
Flexure Testing Machine (Hand Operated)
Flexural tests of concrete beam have their own importance in concrete Road Constructions as well as Buildings constructions. Normally concrete beams of sizes 10cm x 10cm x 50cm or 15cm x 15cm x 70cm are tested for flexural strength.
The machine consists of a hand operated load frame. The lower platen has two rollers, the distance between which is adjustable. For 150mm x 150mm x 700mm beam, the centre to centre difference between the rollers is 600mm, while it is 400mm for beams of size 100mm x 100mm x 500mm size beam. A pressure gauge to indicate load is fixed on the load frame. A small pumping unit is attached to the load frame. Total capacity of the machine is 100 KN and a 150mm dia pressure gauge - 100 KN x 1 KN is fitted on the machine. Since this is a hand operated lightweight machine, it is useful for field laboratory also.
CEMT 1015
Flexure Testing Machine (Electrically Operated)
Same as above but instead of a hand-pumping unit, a separate electrically cum hand operated pumping unit housed in a cabinet is supplied. The pressure gauge 0-100 KN x 1 KN, On/off switch and a slow/fast level to control rate of loading are fitted on the front panel of the pumping unit. A facility for hand operation is provided. A micro switch and relay fitted inside the pressure gauge protects the unit from over loading.
CEMT 1016
Flow Table
This is used for determining the workability of building limes. This flow table consists of a 30cm. dia ground and polished steel plate with three inscribed annular circles. 7, 11 and 19cm. dia. The tabletop is arranged for a free fall of 12.5mm by a cam action. Supplied complete with one brass conical mould, 65mm I.D. at base and 40mm I.D. at top, height of the mould 90mm.
CEMT 1017
Flow Table
It is used for determining the flow of cement concrete. It consists of a steel table top 76.2cm (30 inch. dia), finely machined. The integral cast ribs are designed for support and strength. The stand is fabricated out of cast iron and is of study construction. Holes for mounting in foundations are drilled in the base plate. The ground and hardened steel cam is designed to lift and drop the table by 12.5mm. The hand wheel makes it simple to operate the table. Supplied with one conical mould with handles, 12cm. height having 17cm. top internal diameter and 25cm. I.D. at the base. Complete with a tamping rod 16mm. dia x 600 mm long one end rounded.
CEMT 1018
Flow Table (Motorized)
Same as above but electrically operated, to raise and drop the table top, approx. 15 times in 15 seconds. Suitable for operation on 230 Volts, 50 cycles,
CEMT 1019
Gillmore Needle Apparatus
This instrument is used for determining the time setting of hydraulic cement. It consists of a base with a vertical shaft and two horizontal arms. The lower arm is adjustable for height. 1 No. Initial Needle 1/12 inch dia 1/4 lb.wt. 1No. Final Needle 1/12 inch dia. 1lb.wt. 1No. Glass base plate. Complete as above.
CEMT 1020
Hydraulic Jack (Hand Operated) Remote Type
For applying loads for varous tests in the field or laboratory. Hydraulic Jack hand operated with separate pumping units. These Jacks are portable and available in various capacities. The pumping unit is connected to the hydraulic jack by means of a flexible connecting pipe 2 meter long. The jack is fitted with lifting handles for easy transportation. The approximate lift of the ram is 90 to 120mm. the pumping unit is a single plunger type with detachable handle. The unit is fixed on a Channeled base which is fitted with lifting handles. A pressure release valve is provided on the pumping unit. The load is indicated on a 15cm dial hydraulic pressure gauge of appropriate capacity which can be detached from the pump when not in use. The least count of the calibrated dial will be according to the capacity of the gauge (Normally 100 divisions for full capacity)

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