Cooling Tower

A cooling tower is a heat rejection device, which extracts waste heat to the atmosphere though the cooling of a water stream to a lower temperature.

Common applications for cooling towers are providing cooled water for air-conditioning, manufacturing and electric power generation.

Technical Specifications:

FRP bottle shaped induced draft counter flow with rotating sprinkler assembly, fan directly connected to the motor with water collecting basin, water pump, fitting accessories, capacity 30 TR.
 

Desiccator

Desiccators are sealable enclosures containing desiccants used for preserving moisture-sensitive items such as cobalt chloride paper for another use.

A common use for desiccators is to protect chemicals which are hygroscopic or which react with water from humidity. It is also required some time to achieve a low humidity.

Technical Specifications:

Temperature range from ambient to 2500 C,

with stout sealed glass door, device for attaching direct derive vacuum pump and vacuum pump.

Laboratory Concrete Mixer

The Laboratory Concrete Mixer is used for preparing Mix Design of Concrete. It consists of a steel vessel of 55/ 110 Litres capacity, mounted on a frame.

The vessel of laboratory concrete mixer can be titled to any angle by a hand wheel and counter weight.

This facilitates the mixing and discharge of freshly made concrete.

Technical Specifications:

Concrete mixer tilting type, electrically as well as manually operated, with swivel arrangement, 100

Liters capacity.

Digital Pan Balance

The digital mass balances in the General Material Testing and Concrete Technology Labs are very sensitive instruments used for weighing substances to the milligram level.

Technical Specifications:

Capacity 2000 gm, readability 10 mg, pan size 150 mm (approx), internal calibration.





 

Concrete Impermeability Apparatus

This apparatus is used to determine the depth of penetration of the water into the concrete specimens (impermeability) under known time and pressure.

The unit accepts concrete cubic, cylindrical or prismatic concrete specimens having maximum dimensions of 200x200x200 mm. A manometer checks constantly the applied water pressure.

Technical Specifications:

As per DIN 1048 Part 5 with automatic air Compressor having three cells for testing of 150 mm concrete cubes.


 

Accelerated Curing Tank

Accelerated Curing Method is used to get early high compressive strength in concrete.

This method is also used to find out 28 days compressive strength of concrete specimens within 28 hours (as per IS 9013-1978).
 

Technical Specifications:

For 12 concrete cubes each of 150 mm size with temperature controllable from ambient +5 to 100 degC.


 

J-ring Apparatus

Used for determining the passing ability (measured by the blocking step), the flow spread and t500 flow time of the self compacting concrete as the concrete flows through the J-Ring.

The apparatus consists of a stainless steel crown with 16 bars 18 mm diameter.

Technical Specifications:

Workability of Self Compacting Concrete to prEN12350-12 with 16 bars 18 mm dia.

V-funnel Apparatus 

The V Funnel apparatus is used to evaluate the flow time of freshly mixed self-compacting concrete.

The test is not suitable when the maximum size of the aggregate exceeds 22.4 mm. The test set consists of a stainless steel funnel placed vertically on a supporting stand.

Technical Specifications:

10L capacity with filling hopper, comply with EFNARC European Guidelines for self compacting concrete / prEN.

 

L-shaped Box Apparatus

The L Shape box is used for determining the passing ability rate of freshly mixed self compacting concrete.

L Shape box is designed for ease of cleaning the vertical and horizontal hoppers. The L shape box apparatus is supplied complete with Filling Hopper.

Technical Specifications:

With filling hopper, comply with EFNARC European Guidelines for self compacting concrete / prEN.

 

Accelerated Carbonation of Concrete

Structures that use Portland cement tend to use steel-bar reinforcement.

Carbonation process is the chemical reaction between CO2 and the hydration compounds of cement which causes the reduction of the ph which in turn causes the passivation layer around the steel to break down, exposing reinforcement steel to water and air, bringing the steel to rust.

This test accelerates carbonation in a controlled environment by creating atmosphere involving:

• The concentration of CO2 gas — This is an especially important factor for concrete used in cities with large amounts of pollution.
• Humidity — It is preferable for humidity to be at 50%-70%. There is less water with higher humidity. Water inhibits CO2 diffusion when higher.

Temperature — In hotter environments, there is a higher carbonation rate.

Water to cement ratio — this determines the pore system of the concrete and degree of hydration.

Porosity and permeability

Technical Specifications:

Carbon dioxide range: Atmospheric to 10% by volume with accuracy of 0.08% over entire range. Humidity Control: 10% to 85% RH Accuracy ±  1%.

Laboratory Vibrating Table

The vibrating table is used for compacting the concrete specimens. Other than the laboratory vibrating table there is also a paver block making vibrating table.

The operation of the table ensures the even compacting and packing of freshly made concrete in cubic and cylindrical specimens.

Technical Specifications:

Size 2 m x 1 m. Facility for variable amplitude of vibrations. Electrically o


perated.

Loading Frame

Load frames are used for a variety of static and dynamic testing applications.

Forces are applied vertically in most cases, but can be realized in almost any other configuration.

Technical Specifications:

1500 kN vertical load capacity. 100 kN horizontal load capacity. Capable of testing full scale structural members.




 

Servo-controlled Actuator (100 kN)

Servo controlled actuator provides closed-loop testing systems which in turn provides the ability to directly control the deformation of the loaded specimen.

This considerably enhances the precision, stability, and scope of the experiments.

The most critical aspect of designing the test is the choice of the controlled variable. With appropriate controlled variables and good system performance, several interesting and intricate testing techniques can be developed.

Technical Specifications:

100 kN Actuator, + 75 mm Stroke, Water cooled. Loads at varying frequencies and of different wave forms can be applied.

Curing Tanks

Curing tank is used for curing of cement, concrete specimens (cubes and cylinders).

It can be used for curing cement specimens within the mould, or after removing from the mould.

Technical Specifications:

The curing cabinet provides 20 ± 1°C temperature and over 95% RH humidity for cement specimens.




 

Temperature and Humidity Control Chamber

If the user wants a dry or humid environment, skipping the temperature controller can affect the accuracy of relative humidity.

The higher the temperature of the chamber, it means that the air is capable of handling more moisture at a given temperature.

Technical Specifications:

Temperature ~ 5 - 70 C, Humidity ~40 to 95%, Dimensions ~ 5x4x7 feet



 

Digital Rebound Hammer

Rebound Hammer is used for testing the hardness of concrete specimens.

When the plunger of the rebound hammer is pressed against the surface, the spring controlled mass rebounds which give an idea of the hardness of concrete, which in turn indicates the strength of concrete.

Technical Specifications:

Concrete compressive strength range ~ 10- 100N/mm2. Digital display

Ultrasonic Pulse Velocity Tester

Ultrasonic Pulse Velocity Tester is used to measure the velocity of propagation of ultrasonic pulses through concrete specimens.

A pulse of longitudinal vibrations is produced by an electro-acoustical transducer held in contact with one surface of the concrete under test.

The pulse velocity indicates the amount voids in the concrete specimens, which in turn indicates the strength of the concrete.

Technical Specifications:

Range ~ 0.1-9999µs, Resolution ~ 0.1µs, Display ~ 9x21mm

Half-cell Digital Corrosion Meter

Half-Cell gauges measures the condition and potential corrosion of rebars and steel structures within concrete specimens.

When corrosion occurs the ferric oxide protective layer surrounding the concrete breaks down allowing an electrochemical reaction between the steel and the concrete.

Technical Specifications:

BS 1881: 201 or ASTM Standard. Battery operated automatic with on/off action.

Rapid Chloride Permeability Test Apparatus

The measurement data derived from this test method can be used to estimate the chloride diffusion coefficient of concrete in service life predictions and structure design, as well as durability-based quality control of concrete.

Technical Specifications:

Resistance to chloride ion penetration as per ASTM C 1202 and ASHTO T 277.





 

Data Acquisition System

This equipment could be used to gather data whilst testing of concrete composites in various ways.

Strength, deflection, permeability etc. could be measured continuously.

Technical Specifications:

~ 42 isolated analogue inputs, giving 42 separate single ended channels or 24 differential channels. Signal conditioner for more number of strain channels.

Impact Testing Machine

Impact testing machines evaluate an object's capacity to withstand high-rate loading and it is commonly used to determine the service life of a part or material. Impact resistance can be among the most challenging qualities to measure.

Technical Specifications:

1. A testing machine weighing 45 to 60 kg and having a metal base with a painted lower surface of not less than 30 cm in diameter. It is supported on level and plane concrete floor of minimum 45 cm thickness.
2. A cylindrical steel cup of internal diameter 102 mm, depth 50 mm and minimum thickness 6.3 mm.
3. A metal hammer or tup weighing 13.5 to 14.0 kg the lower end being cylindrical in shape, 50 mm long, 100.0 mm in diameter, with a 2 mm chamfer at the lower edge and case hardened.
4. A cylindrical metal measure having internal diameter 75 mm and depth 50 mm for measuring aggregates.
5. Tamping rod 10 mm in diameter and 230 mm long, rounded at one end.

Ductility Testing Machine

Ductility machines are used to determine the ductility of formed asphalt/cement or semi-solid bitumen by measuring the distance of elongation before reaching the breaking point of a briquet sample, which is pulled apart at a specific speed and temperature.

Technical Specifications:

1. The water bath trough size is 77" x 9-1/2" x 6- 7/8" (L x W x D).
2. The synchronous, direct-drive motor can be set to maintain a speed of 1/4, 1 or 5 cm per minute.
3. The temperature range of the circulator is - 13°F to 300°F (0°C to 30°C).
4. Heater wattage adjustable to 1000W
5. Standard model operates on 120V, 60Hz, .5F version operates on 220V, 50Hz A.C
6. Ductility Briquet mold Meets ASTM D5892, D6084, AASHTO T51.
7. Base Plate-Brass base plate for single mould. Flat surface provides uniform contact with bottom surfaces mold. 5-1/2" x 2" x 1/8" Base Plate.

Flash And Fire Point Testing Machine

Flash and Fire point test is conducted on bitumen to know the safe mixing and application temperature values of particular bitumen grade. At higher temperatures bituminous materials leave out volatiles.

These volatile vapors contain hydro carbons. So, they can catch the fire easily and will cause flash at one point and if it is further prone to heat the material may ignite and burn.

Catching fire is very dangerous during mixing of bitumen especially during its application.

So, it is necessary to recognize the safe temperature values of bitumen grades for mixing as well as for applying.

The limited values of temperature can be determined by conducting Flash point and Fire point test on bitumen.

Technical Specifications:

As per ASTM D92, ASTM D117, AASHTO T48

1. Used to determine flash and fire points by the cleveland open-cup method.
2. Consists of electric Heater with rheostat, flash point platform with Thermometer holder, test burner and flash cup.
3. Utilizes a 1250W-10 amp, nickel-chromium heater with stepless variable control for accurate, repeatable, rate-of-rise temperature settings per specifications.
4. Heater is enclosed in stainless steel housing with cooling vents.

Marshall Stability Testing Machine

It is used for measurement of resistance to plastic flow of cylindrical specimens of bituminous paving mixture loaded on the lateral surface. Hence optimum amount of bitumen required for a bituminous mix can be evaluated on basis of required stability.

Technical Specifications:

The machine can provide measurement data for use with hot mixture containing asphalt or tar and  aggregate up to 25.4mm maximum size.

The equipment comprises a bench top loading frame with a screw-driven adjustable crosshead.

The Marshall Stability Test Machines are available in two models: digital, using a loadcell to measure force and an LVDT to measure displacement; and a non-digital version that uses a proving ring to measure force and a micrometer to measure displacement.

Benkelman Beam Testing Machine
The Benkelman (portable) Beam apparatus is a convenient, cost effective and accurate device used for measuring the deflection of flexible pavements under moving wheel loads.
The beam is commonly used as a tool for evaluating compaction and moisture content in new construction projects.

Technical Specifications:

Main Body
55 ” (1,397 mm) long, black finish aluminum.
Probe Beam
Aluminum, 8 ft. (2.4 m) long, telescopes into Probe Fulcrum
Ball pivot bearing, gives lever ratio of 2:1.
Vibrator System
Operating switch mounted on top of instrument size batteries).
Dial Indicators
Compensated for direct reading (not included).
Leveling Wheel
Adjusts beams to proper elevation.
Open Length
12 ft. (3.7 m) l.
Weight
Net 29 lbs. (13.2 kg).

Bitumen Film Stripping Device

The Film Stripping device is used to measure the resistance of bituminous mixer to stripping of the asphalt from rock particles and is generally used to evaluate the mineral aggregate

It may be used to judge the adhesive capacity of bituminous material.

Technical Specifications:

A circular tray rotates in a vertical plane at a rate of approximately 100 r.p.m. by an eletrical geared motor.

4 bottles of approximately 400 cc are mounted on this circular tray at an angle of 90° to each other with their mouth towards centre of the tray. A time switch is provided. Suitable for operation on

230volts A.C. single phase.

Static Cone Penetration Testing Machine

The cone penetration or cone penetrometer test (CPT) is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy.

It was initially developed in the 1950s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils.




 

SPT & DCPT Testing Facility

It is the only test that provides representative soil samples both for visual inspection in the field and for natural moisture content and classification tests in the laboratory.

SPT values obtained in the field for sand have to be corrected before they are used in empirical correlations and design charts.





 

Digital Direct Shear Testing Machine 

Direct shear test is simple and faster to operate. As thinner specimens are used in shear box, they facilitate drainage of pore water from a saturated sample in less time.
This test is also useful to study friction between two materials, one material in lower half of box and another material in the upper half of box.





 

Consolidation Testing Machine
 

Consolidation Test is used to determine the rate and magnitude of settlement in soils.
The settlement values obtained by this test are due to primary consolidation only which is 90% of the total consolidation.









 

Laboratory Vane Shear Testing Machine
 

Vane shear test is used to determine the undrained shear strength of soils especially soft clays.This test can be done in laboratory or in the field directly on the ground. Vane shear test gives accurate results for soils of low shear strength (less than 0.3 kg/cm2)










 

Unconfined Compressive Strength Testing Machine
 

The unconfined compression test is by far the most popular method of soil shear testing because it is one of the fastest and cheapest methods of measuring shear strength.The method is used primarily for saturated, cohesive soils recovered from thin-walled sampling tubes









 

Relative Density Testing Machine
 

Determination of relative density is helpful in compaction of coarse grained soils and in evaluating safe bearing capacity in case of sandy soils.For very dense gravelly sand, it is possible to obtain relative density greater the one. This means that such natural dense packing could not be obtained in the laboratory









 

Automatic CBR Testing Machine
 

The California Bearing Ratio (CBR) test is a penetration test used to evaluate the subgrade strength of roads and pavements.The results of these tests are used with the empirical curves to determine the thickness of pavement and its component layers









 

Digital Triaxial Shear Testing Machine

Triaxial test to determine the shear strength of a  discontinuity.The triaxial test can be used to determine the shear strength of a discontinuity. A homogeneous and isotropic sample fails due to shear stresses in the sample











 

Universal Testing Machine(For Geosynthetics)

The Universal Tensile Testing Machine is designed for testing geosynthetics in transportation, water conservation, tunnel, construction those industry.It concludes stretch, tearing, busting, peeling, seam testing of geotextile, composite geotextiles, geogrid, geomenbrane










 

Large Direct Shear Testing Machine

As already defined a direct shear test is a laboratory or field test used by geotechnical engineers to measure the shear strength properties of soil or rock material, or of discontinuities in soil or rock masses











 

Reaction Frame For Plate Load Test

Plate load test is a field test, which is performed to determine the ultimate bearing capacity of soil and the probable settlement under a given load. For performing this test. The plate is placed at the desired depth, then the load is applied gradually and the settlement for each increment of load is recorded










 

Swell Pressure Testing Machine

The compacted unsaturated soils, on the dry of optimum, have open structure and are more vulnerable to drastic volume changes upon saturation.Two distinct volumetric responses may be observed upon wetting of such soils based on the stress levels in the soil










 

Triaxial Shear Testing Machine

Triaxial test to determine the shear strength of a discontinuity. The triaxial test can be used to determine the shear strength of a discontinuity. A homogeneous and isotropic sample fails due to shear stresses in the sample











 

COD Digestion Apparatus

Chemical oxygen demand (COD) is an indirect measurement of the amount of organic matter in a sample. With this test, you can measure virtually all organic compounds that can be digested by a digestion reagent











 

BOD Incubator

The full from of BOD Incubator is Biological Oxygen Demand incubator. It is widely used in microbiology laboratories for the applications that include cell culture and fungal growth, BOD test, fermentation, crop and physiology and various pharmaceutical tests etc










 

Photochemical Reactor

The photochemical reactor is used to carry out a photochemical reaction, water splitting, and photochlorination reaction

Applications

• Photochlorination.
• Water Splitting.
• Water treatment.
• Pharmaceuticals industry.
• Research and development laboratories.
• Educational institutes.
• Alternative Energy.
• Environmental Engineering.
  
   

UV Visible Double Beam Spectrophoto Meter

A UV-Vis spectrophotometer is used to determine the absorption of light from a sample and can be used as a detector for HPLC. A sample is placed in the UV/VIS beam and absorbance versus wavelength is measured