Delhi, India
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Often, existing concrete structures will need to be examined and tested to ensure the concrete remains of adequate strength and durability. This test is used to determine the compressive strength of a concrete core, which has usually been extracted from an existing structure. The value of compressive strength can then be used in conjunction with other measured properties to assess the condition of the concrete.
Extraction of concrete cores, achieved by rotary drilling using a diamond tipped hollow barrel, serve as a means of taking a sample of concrete which can then be used to determine various physical properties, but most commonly compressive strength.
Cores can generally be extracted from wherever access allows, and would include floor slabs, walls and columns. 10cm diameter cores, generally afford the minimum diameter required for a representative sample and require less reinstatement than larger diameter cores. 15cm diameter cores will generally give more representative samples than smaller diameters but require more reinstatement.
As per leaflet
Diamond Impregnated core drills of required dia and length, Masonry core cutter, Grinding and Lapping Machine
Used for specific gravity and water absorption test of aggregate. The basket is used in conjunction with a suitable electronic balance, a specially designed robust frame to support the electronic balance and water tight container.
The Density basket is of 20cm dia x 20cm high fitted with galvanized wire mesh of 6.3mm with handle for suspending it from the balance.
The following accessories are not part of the standard supply and are supplied at an extra cost.
A specially designed frame with moving platform to carry the water container allowing the test specimens to be weighed in both air and water.
This Equipment is to speed up the process with ease and accuracy to prepare cylindrical specimens for Marshal Stability Testing Machine. The mix is uniformly heated and mixed to yield homogenous mix and better moulds for testing. The same mixer without heating jacket and some modifications can also be used for mixing of soil, cement paste, mortars, pozzolanas etc.
Electrically operated, fitted with heating jacket for thorough mixing of Bitumen. The mixer is operated by 0.5 HP single phase electric motor connected to epicycle type stainless steel paddle to impart both planetary and revolving motion for uniform mixing. Mixer blade has low speed of 140 + 5 rpm and medium speed of 285 + 10 rpm, while it also has a planetary movement of 62 + 5 rpm in low range and planetary movement of 125 + 10 rpm in medium range. A stainless steel bowl of approx. 5 liter capacities with handle is also supplied. The 500 Watts heating jacket with energy regulator to control the temp. Is fitted below the bowl. Complete unit is supported on a strong iron frame. Suitable to work on 220V, 50 Hz, AC single phase.
Viscosity is the property of the fluid by which it resists flow due to internal friction. Used for determining viscosity of cut - back bitumen and road oil. Viscosity is measured by determining the time taken by 50 cc of the material to flow from a cup through a specified orifice.
The apparatus consist of bath with cup of 10 mm or 4 mm orifice and sleeve stirrer with ball lifting clip and ball .The bath is fitted with an immersion heater to take the water to the required temperature and a drain valve. The temperature is controlled by energy regulator or voltage varrier.(extra cost) The assembly is kept on suitable stand with leveling screws. Suitable to operate on 220 V.50 Hz, AC single phase.
The following accessories and consumables are not part of the standard supply and are mandatory for the testing work
Used for specific gravity test by removing air voids from the Bitumen Mix. Very useful for other general laboratory tests where vacuum is required.
Complete with base, motor, pulley and belt. The pump mechanism is contained in a metal case with oil level and drain plug at base. Pump speed 450 RPM. Ultimate vacuum 0.01 mm/Hg. (Single stage). Complete with non-return valve, belt gauge and vacuum gauge with regulator.
50 Liter. /Min, Motor Rating: 0.25 HP Single Phases. To work on 230 V AC, 50 Hz. Single Phase. Supplied complete with filtering flask of 1000 / 2000 ml. Capacity with rubber cork and pressure pipe to carry out the test.
Hard Rubber Pipe of Required Length
Consist of a drum made of welded steel having an inside diameter of 300mm x 300mm long. Supported on heavy duty bearings. A reduction gear driven by a motor rotates the ball mill at 28-30 PM. Supplied complete with 12-19mm dia steel balls and revolution Counter.
Laboratory Pulverizer is a disc type grinder, designed to grind virtually any material to produce a fine mesh sample in one operation. It is a self contained grinder, with a rotary disc, having a planetary movement in a vertical plane. This feature gives added life to the moving parts and produces a sample of uniform fineness. Grinding is done between two discs, one of which is stationary and the other revolving eccentrically at high speed. The discs are made from heat treated mechanite metal. With the help of a convenient hand wheel, the six of the final product can be adjusted. This can be done, even while the machine is in operation. A self locking device holds the hinged grinding chamber in place and affords easy and quick access to it, for removal of ground samples & for cleaning. The Pulverizer has a capacity of reducing about half a kilogram of Quartz type sample to 100 mesh in about minute. The Pulverizer is supplied complete with a 3 H.P. Motor, a starter, "V" Belt pulley drive and mounting wired for 440 Volts, 3 phase A.C. 50 Hz. Disc Diameter : 175 mm. Maximum feed Size : 6 mm Yield : 250 gms/min size of finished product. : 100 mesh
Concrete moulds are easily cast by using a tamping bar or a vibrating table. However air tapped in cement mortar paste cannot be thus removed while casting cement mortar moulds. Easy method is to impart greater vibration of lesser amplitude to the mould while casting. This is achieved in a vibrating machine. Vibration machine is used for the preparation of mortar cubes for the determination of compression strength of ordinary and rapid hardening Portland cement, low heat Portland cement, Portland blast furnace cement and high alumina cements.
The machine embodies a hydraulic system designed to meet the requirements of Indian standards Specification 516-1959 for compression tests on cement mortar cubes up to 7.06 cms.
The hydraulic jack of 500 KN capacity is fixed to the base. The upper platen has got a self aligning action and is attached to a screw which passes through the cross head plate, and can be raised or 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 upward movement of lower platen. A dust cover is provided on the jack to prevent any dust from going into the cylinder. A spacer with a centering locating pin is provided to test small specimens. The lower and upper platens of the machine are hardened ground and polished. Guidelines are marked on the lower platen to keep the specimen coaxial with the hydraulic jack.
The motorized pumping unit which is housed in an elegant console is of double plunger type and is driven by three phase 440 volts 50 cycles electric motor. The pumping unit is a 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 a 20cm dia, dial hydraulic pressure gauge with 250 division i.e. 0-500 KN X 2 KN. A max red pointer is provided to facilitate taking readings after failure of the specimen. The pressure gauge is fixed at an Angle for easy readability. The machine is fitted with hand wheel control which enables the rate of application of load to varied.The machine is equipped with the facility of Hand Pumping in case of power failure.The electric pumping unit is fixed with a micro-switch to switch off the motor automatically as the load on the machine approaches the rated capacity. Relays are incorporated in the pumping unit so that in case of breakdown of power supply, the motor will stop and would not re start unless the starting switch is operated. Complete with our own calibration certificate for pressure gauge with National Traceability.
The Machine can be supplied with NCCBM Calibration certificate at an extra cost.
The Machine can also be supplied with 2 or 3 pressure Gauges of 100 KN, 250 KN and 500 KN for testing lower strength cubes or smaller size cubes.
Optionally, the machine can be supplied with digital load indicator and load cell in place of Pressure Gauge at an extra cost.
It is used for mixing cement pastes, mortars and pozzolanas. The mixer consists of an epicycle type stainless steel paddle imparting both planetary and revolving motion. Mixer has two speeds. Mixer blade has low speed of 140 + 5 rpm and medium speed of 285 + 10 rpm, while it also has a planetary movement of 62 + 5 rpm in low range and planetary movement of 125 + 10 rpm in medium range. Stainless steel bowl fitted with handle, fitted with lid made of non-absorbing material and not attacked by cement, masonry cement, cement pozzolana mixture or lime pozzolana mixture. The scraper consists of semi rigid rubber blade attached to a handle about 150 mm long. Suitable for operation on 230 Volts, single phase.
The Vee bee consistometer measures the remolding ability of concrete under vibration. The test results reflect the amount of energy required to remold a quantity of concrete under given vibration conditions. The Vee bee consistometer is applicable to concrete with slumps less than 2 inches.
The apparatus, consists of a metal cylindrical container mounted on a vibrating table, which produces a sinusoidal vibration, a slump cone is placed in the center of the cylinder and filled in the same manner as in the standard slump test. After the slump cone is removed, a clear plastic disk is set atop the fresh concrete. The Vee bee table is started and the time for the concrete to remold from the slump cone shape to the shape of the outer cylindrical container is recorded as a measure of consistency. The sliding clear plastic disk facilitates the determination of the end of the test.
Consists of: A vibrating table, size 380mm long and 260mm wide, resting upon elastic support at a height of about 305mm above the floor, complete with start/stop switch cord and plug A holder is fixed to the base into which a swivel arm is telescoped with funnel and guide sleeve. The swivel arm is also detachable form vibrating Table. A graduated rod is fixed on a swivel arm and at its end a plastic disc is screwed. The divisions of scale on the road record the slump of the concrete in millimeters. Supplied complete with a sheet metal. Container with lifting handles which can easily be fixed to the vibrating table. A slump cone open at both ends with lifting handles and a Tamping rod of size 16mm dia and 600mm long, rounded at one end. AS PER IS: 1199
In the process of compaction, efforts are only directed to reduce voids in the compacted concrete. The Vibrators produce vibrations which when transmitted to plastic concrete make it to flow and affect compaction. The air bubbles are forced out of concrete due to vibrations.
The Needle Vibrator, also known as immersion or poker vibrator have a power unit and long flexible tube at the end of which a vibrating head is attached. Wherever compaction is to be done, the vibrating head is inserted in the concrete.
The Laboratory needle vibrator having 350mm long X 25mm dia Needle is used in vibrating concrete test cylinders and beams in the field or laboratory. It is also widely used in making laboratory specimens, in making concrete products, in experimental works, and in small scale construction project. It has 1 meter long flexible shaft and is powered by 1 HP single Phase Electric motor.
The Needle vibrator for compaction of mass concrete has 40 or 60mm dia needle with 6 meter long flexible shaft and powered by 3 HP Electric motor for operation on 440 Volts, 3 phase, 50 cycles, A.C. Supply. Optionally, the Vibrator can also be fitted with Petrol/kerosene or Diesel Engine for field use.
Spare Needle with shaft
Hydraulic Jacks are of multipurpose utility i.e. application of loads while engaged in field investigation, determination of load carrying capacity of piles in the field, tensioning of wires in pre-cast structures, loading of members of any structures for deformation characteristics. For applying loads for various test in field or laboratory. Hydraulic Jack hand operated with separate pumping units. These jacks are portable available in various capacities. The pumping unit is connected to the hydraulic jack by means of a flexible connecting pipe 2/3 meter long. The jack is fitted with lifting handles for easy transportation. The approximate lift of the ram is 150 mm/200mm. 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 15 cm 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). Lift of ram - 150 mm/200mm
Often, existing concrete structures will need to be examined and tested to ensure the concrete remains of adequate strength and durability. Rebound hammer surveys can be conducted to provide a rough estimate of concrete strength, where it is not possible to determine this by more accurate means such as core extraction and testing.
The test involves using a special rebound hammer, which measures the recoil of a piston against the concrete surface when a standard force is applied. This recoil can then be correlated approximately to concrete strength.
The rebound hammer 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 lock the rider in place and the rider can be reset to zero Position by using the same button. The equivalent compressive strength can be computed from the chart supplied. It is suitable for specimen of compressive strengths 100-700Kg/cm. The instrument, complete with a grinding stone for polishing the test surface, is supplied in carrying case.
The machine is suitable for laboratory use for taking cylindrical cores from rock or concrete block. It is compact with a sturdy base, a pillar support with a rack and pinion arrangement for adjusting the height. A penetration assembly centre weights, and a swivel attachment are also provided. Suitable grips are supplied for loading the rock or the complete block of about 300 x 300mm. in position for taking out the core of required size. Supplied with Drill bit of 4" dia. and 12" long barrel with suitable 'A' type adopter. Wired for 440volts, 3 ph, 50Hz.
The machine embodies a hydraulic system designed to meet the requirements of Indian standards Specification 516-1959 for compression tests on cement mortar cubes up to 7.06 cms.
The hydraulic jack of 500 KN capacity is fixed to the base. The upper platen has got a self aligning action and is attached to a screw which passes through the cross head plate, and can be raised or 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 upward movement of lower platen. A dust cover is provided on the jack to prevent any dust from going into the cylinder. A spacer with a centering locating pin is provided to test small specimens. The lower and upper platens of the machine are hardened ground and polished. Guidelines are marked on the lower platen to keep the specimen coaxial with the hydraulic jack.
The motorized pumping unit which is housed in an elegant console is of double plunger type and is driven by three phase 440 volts 50 cycles electric motor. The pumping unit is a 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 a 20cm dia, dial hydraulic pressure gauge with 250 division i.e. 0-500 KN X 2 KN. A max red pointer is provided to facilitate taking readings after failure of the specimen. The pressure gauge is fixed at an Angle for easy readability. The machine is fitted with hand wheel control which enables the rate of application of load to varied.The machine is equipped with the facility of Hand Pumping in case of power failure.The electric pumping unit is fixed with a micro-switch to switch off the motor automatically as the load on the machine approaches the rated capacity. Relays are incorporated in the pumping unit so that in case of breakdown of power supply, the motor will stop and would not re start unless the starting switch is operated. Complete with our own calibration certificate for pressure gauge with National Traceability.
The Machine can be supplied with NCCBM Calibration certificate at an extra cost.
The Machine can also be supplied with 2 or 3 pressure Gauges of 100 KN, 250 KN and 500 KN for testing lower strength cubes or smaller size cubes.
Optionally, the machine can be supplied with digital load indicator and load cell in place of Pressure Gauge at an extra cost.
It will consist of metallic cone with half angle of 15' -30 15' and 30.50mm coned length. It will be fixed at the end of a metallic rod with a disc at the top of the rod so as to have a total sliding weight of 148 0.5 gms. The total rod shall pass through two guides. (to ensure vertical movement) fixed to a stand. Suitable provision will be made for clamping the vertical rod at any desired height above the surface of the paste in the trough. A brass trough 50 mm internal diameter and 50 mm depth will be provided as per IS specification resting on M.S.bars.
Ground Glass: 10mm thick and about 45 cm square or larger rough glass as per IS 2720 (Part V-1985) for mixing soil and water
Spatula: Flexible with blade about 8 cm long and 2 cm wide made from stainless steel material as per IS: 2720 (part V-1985)
Evaporating dish: Made from porcelain material having diameter of about 12 to 15 cm with smooth surface as per IS 2720 (part V-1985)
Consists of panel for wall mounting on which are fitted wall mounting on which are fitted 1.0 to 10Kg/cm2 x0.1Kg/cm2 a pressure gauge, Bourdon tube 20cm dia.
Glass U-tube manometer 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 transport Perspex with mercury trap and cursor to indicate the mercury level.
50 ml Burette for measuring the volume change in the soil specimen. Pressure pump fitted with four sleeve packed valve, Operated by means of a hand wheel on the end of the piston rod which is threaded thru the pump cap and gives a smooth, fine adjustment of pressure copper coil and water reservoir.
The unit is tested against leaks up to 10Kg/cm2
A mechanical stirring device in which a suitably mounted induction motor will have a vertical shaft having speed of 6000 to 8000 revolutions per minute when loaded. The shaft will be equipped with a replaceable stirring paddle of either of the types and made of metal. The surface will be of such length that the stirring paddle will operate not less than 20 mm and not more than 35 mm above the bottom of the dispersion cup. The dispersion cup will be supported on a rest and shall have a removable baffle. A special dispersion cup conforming to either of the designs shown in IS 2720 (Part IV) 1985 will be provided to hold the sample while it is dispersed. The stirrer will be free from vibration whilst operation and the base will be made of M.S. of at least size 20 cm X 25 cm with rubber cushions. The container and baffle will be of such material as not be affected by the reagents like sodium Carbonate, Sodium silicate , Sodium Hexametaphosphate etc. The stirrings device will be suitable for operation on 230-250 Volts A C with controller switch for different revolution. It will be provided with 3 core wiring of with off-on switch on side. The dimensions of stirring paddles for stirring apparatus and dispersion cup will be as per IS 2720(Part IV) 1985.
The apparatus consists of a pressure chamber which has a flanged top cap fitted with a 10Kg/Cm2. Pressure gauge and a valve for pumping in air. Water inlet and drain cock are fitted to the chamber. The foot pump supplied easily develops a pressure of 10Kg. /Cm2 Complete with connecting pressure hose.
This is widely used for determination for closed cup Flash Point of Fuel Oil, cut back asphalts, other viscous material and suspension of solids having a flash point above 490C (1200F).
This apparatus is made as per IP 34. ASTM D-93 and IS 1209-1978 method B. The apparatus consists of brass test cup with handle, removable cup cover with spring operated rotating shutter having Oil Test Jet/Gas Test Jet Flame Device. Stirrer with flexible shaft. The assembly rests in air bath, which is covered, with dome shape metal top. The cup is fitted with insulated handle and locking arrangement near cup flange. The assembly is kept on round shaped electric heater with Energy regulator temperature control. Suitable for operation on 220 Volts 50 cycles AC.
The following accessories are not part of the standard supply and supplied at an extra cost.
This Equipment is to speed up the process with ease and accuracy to prepare cylindrical specimens for Marshal Stability Testing Machine. The compactor has been designed to simulate hand compaction as described in ASTM D1559. This apparatus automatically compacts the sample and stops after preset number of blows has been completed. The Compactor gives uniformly and accurately compacted marshal moulds for reliable testing.
It is a motor driven mechanical compactor useful for compaction into 100 mm dia moulds. It is fitted with a compaction rammer of 98.5mm dia, weighing 4.535 kg. with a free fall of 457 mm. The rammer assembly is provided with a ratchet and pawl arrangement to lift it from the top of the test sample. When the rammer reaches the required height the pawl release the rammer which falls freely on test specimen. The release mechanism is connected by an arm moving up and down which is connected to a reduction gear coupled to the motor through another arm. An automatic blow counter fitted to the compactor is used to set the number of blows. The Compactor is supplied complete with wooden pedestal. Suitable to work on 220V, 50 Hz, AC single phase.
