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Cement / Concrete Testing


CEMT 1001
Air Entrainment Meter
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As Entertainment of air in limited percentage improves durability of concrete and very low percentages deteriorate it, measurement of air entrapped in freshly mixed concrete becomes important. The use of chemical additives to increase workability of concrete requires an air content check to be made. Air Entertainment meters are used to determine air entertained in freshly mixed concrete by pressure method.

The apparatus consists of a pressure tight-flanged cylindrical measuring bowl of 0.005 cubic meter capacity for maximum size of aggregate 38mm. The bowl is fitted with a removable flanged conical cover assembly with the help of a seal. The conical cover has an air valve and a pet cock for bleeding off the water. A transparent cylindrical stand pipe which is graduated in air content is fixed to the conical cover assembly. Pressure is applied to the specimen with the help of a pressure bulb and the pressure is recorded on the pressure gauge which is mounted on the stand pipe. The whole assembly is mounted on a flat base. The instrument is supplied complete with one each following accessories. Calibration cylinder with spring clamp, Trowel, Tamping rod, Straight edge, Rubber mallet and measure.
Available in following sizes & capacities:
0.005 cubic meter capacity for maximum size of aggregate 38mm.
0.007 cubic meter capacity for maximum size of aggregate 50mm.
0.01 cubic meter capacity for maximum size of aggregate 75mm.
0.1 cubic meter capacity for maximum size of aggregate 150mm.
 
 
CEMT 1002
Air Permeability Apparatus (Rigden Type)
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Comprises one air permeability cell for range 500 to 10000sq.cm/gm. The cell is complete with a perforated disc and a compacting plunger. The instrument is supplied with 'U' Tube manometer having an isolation tap assembly and a suction bulb., This apparatus is mounted in a wooden cabinet.
 
 
CEMT 1003
Lea And Nurse Air Permeability Apparatus
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The method and results obtained from this apparatus depend upon the rate at which air flows under a given pressure gradient through a bed of powder of known density and voids content, in order to determine the surface area of the individual particles.
The complete equipment comprises of one Air Permeability Cell Lea and Nurse type for areas 500 to 10000 sq.cm/gm. Complete with perforated plate one capillary tube, one plunger for compaction of sample and a wooden case.
Accessories : Air source, comprising one pressure chamber fitted with valve, regulator, connecting tube, a foot pump and two drying towers. Manometer liquid in 500 ml bottles.
 
 
CEMT 1004
Blaine Air Permeability Apparatus
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The apparatus is used for determining the fineness of cement in terms of specific surface expressed as total surface area in square centimeters per gram of cement. This is a variable flow type air permeameter.
The apparatus consists one each of permeability cell 12.5mm I.D., Manometer 'U' type mounted on stand with a built in stop cock, Perforated disc, Plunger Rubber stopper, Rubber tube 30cm long. Packet of 12 filter paper discs and a bottle of 100cc dibutyiphthalate liquid.
Spares and Accessories: Punch to cut filter paper discs. Non-perforated disc. Suction bulb
 
 
CEMT 1005
Capping Set (Horizontal)
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The set comprises of a cylinder capper, a cylinder carrier and a ladle. The cylinder capper consists of a base on which two accurately machined plates are mounted vertically. One plate is firmly fixed and the other one is adjustable horizontally. Two plates are provided with holders of holding the cylinder in position. The holders are split and the bottom half of each holder is fixed firmly and the top half of each is removable and bolted down to the lower half. On the upper parts of the vertical plates 'V's are provided for pouring the capping compound. Two spacers are also provided. Complete with cylinder carrier and ladle for molten compound. Available in following two sizes:
For 150mm dia x 300mm length cylinders.
For 100mm dia x 200mm length cylinders.
 
 
CEMT 1006
Capping Set (Vertical)
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For capping compression cylinder specimens. This apparatus can be used both in the laboratory and in the field. The specimens capped in this apparatus have plane parallel faces. Consists of a base with an upright. The upright serves as a guide for positioning the capping plate and the cylinder. The 19mm thick capping plate is machined accurately. There is a recess in the plate for keeping the molten capping compound and to position cylinder. Complete with cylinder carrier and ladle. Available in the following two sizes.
For cylinders 150mm dia x 300mm long.
For cylinders 100mm dia x 200mm long.
 
 
CEMT 1007
Cement Sampler
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This is a brass tube approximately 53cm long and 2.8cm I.D. with a wooden handle. Total length approximately 73cm. The tube has the sharp angular edge, which conveniently pierces cement bags. An air hole of approximately 3mm dia is drilled on the near handle. Total sample collected at one time is 300cm³ approximately.
 
 
CEMT 1008
Compaction Factor Apparatus
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The apparatus is used for determining the workability of fresh concrete, provided the maximum size of the aggregate does not exceed 38mm. The test is particularly useful for concrete mixes of very low workability where true slump values are not reliable. It consists of two rigid conical hoppers and a cylinder mounted on a rigid metal frame. The lower openings of the hoppers are fitted with hinged trap-doors having quick release catches. A circular metal plate is provided to cover the top of the cylinder. Supplied complete with one plaster's trowel and one tamping rod, 16mm dia x 600mm long, one end rounded.
 
 
CEMT 1009
Compression Testing Machine CTM (Hand Operated)
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The machine is designed for portability, operating convenience and accuracy. It is a compact and self-contained. Unit ideally suited for mobile and field laboratories. Specimens up to 15cms cubes and 15 cms dia x 30 cms high cylinders can be accommodated. Load measurement is done by a 15 cms dial bourdon tube type hydraulic pressure gauge calibrated in 100 divisions, fitted with a maximum pointer (lagless pointer). The gauge is calibrated against an RTC tested proving ring.
The machine is of channel construction (also available in pillar type construction), giving excellent lateral rigidity. The hydraulic loading unit is located on the base of the loading machine. The hydraulic jack is precision machined. The piston and cylinder are ground and lapped to fine tolerances. The lower platen can be centrally located on the base, and has concentric grooves for centering the specimen. Spacer is provided to test small specimens. The upper platen is mounted on a swivel arrangement for self-aligning action. The pump is fitted integral on the testing machine along with oil reservoir. The hand operated pump is of two-speed concentric piston type.
Available in following capacities:
10 Tons, 25 Tons, 50 Tons, 100 Tons, 150 Tons, 200 Tons
 
 
CEMT 1010
Compression Testing Machine CTM (electrically Operated)
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It is an electric cum hand operated machine for performing compression tests on concrete specimens up to 20cm dia and 30 cm in height. The machine meets the essential requirements of various Indian, British & American standards for compression tests.
Loading Unit : The hydraulic jack of 2000 kN capacity is fixed to base. The upper platen has got a self-aligning action and is attached to a screw which passes through the cross head and can be raised for lowered for initial clearance adjustment. The lower platen rests on the jack ram and is positioned with the help of a centering pin. Loading is accomplished by the upward movement of the lower platen.
Pumping Unit : The motorized pumping unit which is housed in an elegant console is of double plunger type and is driven by 3 phase 440 volts 50 cycles electric motor. The pumping unit is separate unit connected to the jack by means of a steel connecting tube. A junction box is suitably fixed to connect the motor to the mains through a push button starter. The pumping unit is fitted with gauges. A maximum pointer is provided to facilitate taking of the reading after failure of the specimen. The pressure gauges are fixed on the pumping unit at an angle for easy readability. The machine is fitted with a hand wheel control which enables the rate of application of load to be varied. The machine is also equipped with facilities for hand pumping in case of power failure. The electric pumping unit is fixed with a micro-switch off the motor automatically as the load on the machine approaches the rated capacity. Relays are also incorporated in the pumping unit so that in the case of breakdown of power supply, the motor will stop and would not-re-start unless starting switch is operated.
Available in following capacities:
10 Tons, 25 Tons, 50 Tons, 100 Tons, 150 Tons, 200 Tons, 300 Tons
 
 

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