Quick answer. The first decision on this page is which workability method suits your mixes, because the five fresh-concrete instruments are not alternatives at different prices. Slump suits medium workability; the Vee-Bee consistometer suits stiff and very stiff mixes; compaction factor suits low to medium workability in the laboratory; the Kelly ball is a quick check on placed concrete; and the penetrometers measure setting and stiffening rather than initial workability. A method used outside its range produces a number that means nothing. Buy to the mixes you test and the standard your customers name, then give the curing tank the same care as the compression machine.
About forty items, coded CTM-0001 onwards, following concrete from the mixer to the failed cube. Fresh concrete: slump test apparatus, a Vee-Bee consistometer, a compaction factor apparatus, a Kelly ball penetration apparatus, pocket concrete and mortar penetrometers, a Southard viscometer, air entrainment meters and a sand absorption cone with tamper. Making and curing specimens: a motorised laboratory concrete mixer, a vibrating table, curing tanks in metal and plastic, moulds and a gauging trowel. Hardened concrete: an analogue compression testing machine, a longitudinal compressometer, a lateral extensometer, a demountable mechanical strain gauge, density apparatus for fresh and hardened concrete, and a three-cell permeability apparatus. A melting pot for capping compound completes the set.
Five instruments in this listing measure the workability of fresh concrete, and buyers routinely assume they are alternatives at different prices. They are not. Each suits a different range of consistency, and a method used outside its range produces a number that means nothing. This is the most useful thing to understand before ordering from this page.
| Method | Suits | Fails when |
|---|---|---|
| Slump | Medium workability concrete - the everyday site test, quick and understood by everyone | A very stiff mix barely slumps and a flowing mix collapses, so at both ends of the range the reading stops discriminating between mixes |
| Vee-Bee consistometer | Stiff and very stiff mixes, where slump has given up. The result is a time, not a height | Flowing mixes, which pass through in seconds |
| Compaction factor | Low to medium workability, especially in the laboratory. Gives a ratio of partially to fully compacted density | Very wet mixes, which compact fully under their own weight |
| Kelly ball penetration | A quick site check on a placed surface, with no need to fill a cone | Mixes with large aggregate, and any situation needing a formally specified result |
| Penetrometers, mortar and pocket type | Setting time and stiffening of mortar and placed concrete, rather than initial workability | As a workability measure - they answer a different question |
So buy to your mixes and to the standard your customers name, not to the catalogue. A laboratory testing stiff precast mixes needs the Vee-Bee; one testing ready-mixed site concrete needs slump; one teaching the subject properly wants slump and compaction factor so students can see that two methods rank mixes differently.
Standard compressive strength is defined on specimens cured in water at a controlled temperature for a stated age. That makes the curing tank a measuring instrument in all but name: a twenty-eight day result on specimens cured in a bucket at whatever temperature the room reached is not a standard result and cannot be compared with a specification.
So ask about the tank as carefully as about the machine: capacity in specimens, not litres; the heater and thermostat, the control tolerance and whether temperature is recorded; whether circulation is provided, since a still tank stratifies and the specimens at the bottom cure at a different temperature from those at the top; the material and whether it will corrode; and how it is drained and cleaned. Ask also about the moulds - dimensional tolerance and the flatness of the faces are specified by the standard, because a specimen that is not a true cube or cylinder with plane parallel ends fails early and under-reports the concrete - and about how moulds are checked in service, because they wear and distort.
The melting pot in this listing is for sulphur capping compound, which is the traditional way of giving a cylinder plane parallel ends. Two things worth knowing: molten capping compound is hot and gives off fumes, so it needs extraction and a defined procedure; and ground ends or neoprene pad caps are the modern alternative and avoid the hot work entirely, so ask which your standard permits before buying the pot.
The compression machine itself is specified in detail in our universal testing machines listing - capacity, accuracy class and the verification certificate that an assessor will ask for first. Two details specific to concrete belong here.
The rate of loading is part of the method. Standards specify it, and loading faster than specified gives a higher strength. On an analogue machine the rate is set by the operator watching a gauge, which makes it a skill; on a servo-controlled machine it is set and held. Ask how the rate is controlled and how it is verified.
The platens and the spherical seat. The upper platen sits on a spherical seat so that it can align itself with a specimen that is not perfectly parallel. If that seat is stiff with age, rust or paint, it stops aligning, the specimen is loaded unevenly, and the result is low - a quiet fault that gets blamed on the concrete. Ask whether the seat is serviceable, how it is maintained, and what the platen flatness specification is.
Three instruments here measure deformation rather than failure, and they are what a laboratory needs to report modulus of elasticity and Poisson ratio rather than just strength. A longitudinal compressometer measures axial shortening over a gauge length, a lateral extensometer measures the diametral expansion that goes with it, and a demountable mechanical strain gauge measures strain between fixed points on a structure or a large specimen.
Three questions. What gauge length does each use, and does it match your standard - the gauge length is part of the measurement, not a convenience. How is the instrument clamped to the specimen, and does the clamping mark or restrain it. And - the practical one that costs money - is the instrument removed before the specimen is loaded to failure? A cylinder failing with a compressometer attached will damage it, so the method normally loads to a fraction of the expected strength for the modulus determination, unloads, removes the instrument and then takes the specimen to failure. Ask us for the procedure with the instrument, and budget for the spare parts that get broken when it is not followed.
The air entrainment meters measure the air content of fresh concrete, which matters wherever concrete will freeze: entrained air gives the water somewhere to go when it expands. The pressure method is the usual one, and it needs calibrating with water before use and a correction for the aggregate. Ask which method the meter implements, what the calibration procedure is and how often it should be repeated.
The three-cell permeability apparatus addresses durability from the other direction - how readily water passes through hardened concrete, which governs how quickly chlorides and carbonation reach the reinforcement. Ask what pressure it applies, how flow or penetration is measured, how long a determination takes and what specimen size it accepts. For a department teaching durability rather than just strength, this and the air meter are the two instruments worth having beyond the compression machine.
The standard and version each item is built to; for workability apparatus, the consistency range it suits; mould dimensional tolerance, face flatness and whether a certificate is supplied; curing tank capacity in specimens, heater, thermostat tolerance, circulation and temperature recording; compression machine capacity, accuracy class, verification certificate, rate-of-loading control and platen and spherical seat condition; gauge lengths and clamping for the deformation instruments, with the loading procedure and spare parts; air meter method and calibration procedure; permeability pressure, measurement method and test duration; consumables with prices - capping compound, moulds, gaskets, filter media; services at the position including water and drainage; mass, footprint and floor loading; nominal voltage, frequency and plug pattern; and the warranty, commissioning and local service position. For any certification stated here, contact us for the latest copies of the relevant certificates before you tender on it.
Related ranges: cement testing equipments for the binder itself, soil testing machines and bitumen testing instruments for the rest of a materials laboratory, civil engineering lab equipments for soil strength testing and surveying, and universal testing machines for the load frames. The full set is listed under testing machines. For a quotation, tell us the destination country, the standards your customers name, the consistency of the mixes you test and whether you need modulus of elasticity as well as strength.
It depends on the consistency you test. Slump is the everyday site test for medium workability, but a very stiff mix barely slumps and a flowing mix collapses, so it stops discriminating at both ends. The Vee-Bee consistometer takes over for stiff and very stiff mixes and gives a time rather than a height. Compaction factor suits low to medium workability and fails on very wet mixes. A precast laboratory testing stiff mixes needs Vee-Bee, a ready-mix site laboratory needs slump, and a teaching laboratory benefits from slump and compaction factor together, so students see two methods rank mixes differently.
Because standard compressive strength is defined on specimens cured in water at a controlled temperature for a stated age, which makes the tank a measuring instrument in all but name. A twenty-eight day result on specimens cured in a bucket at room temperature is not a standard result. Ask for capacity in specimens rather than litres, the heater and thermostat with its control tolerance, whether temperature is recorded, whether water is circulated - a still tank stratifies, so bottom and top specimens cure differently - the tank material and corrosion resistance, and how it is drained and cleaned. Metal and plastic tanks are both listed.
Only if your standard calls for sulphur capping. The melting pot in this listing melts capping compound, the traditional way of giving a cylinder plane parallel ends, which matters because a specimen without true ends fails early and under-reports the concrete. Two cautions: molten capping compound is hot and gives off fumes, so it needs extraction and a written procedure; and ground ends or neoprene pad caps are the modern alternatives that avoid the hot work entirely. Ask which method your standard permits before buying the pot, and if you do buy it, budget capping compound as a consumable.
Three quiet faults are named on this page. The rate of loading is part of the method: loading faster than specified gives a higher strength, and on the analogue compression testing machine the rate is set by an operator watching a gauge, so ask how it is controlled and verified. The upper platen's spherical seat must move freely; if it is stiff with age, rust or paint, the specimen loads unevenly and reads low. And moulds wear and distort, so ask about dimensional tolerance, face flatness and how moulds are checked in service. Full machine details sit in our universal testing machines listing.
Follow the loading procedure. The longitudinal compressometer measures axial shortening, the lateral extensometer measures diametral expansion, and together they give modulus of elasticity and Poisson ratio. The method normally loads the cylinder to a fraction of its expected strength, unloads, removes the instrument and only then takes the specimen to failure - a cylinder failing with a compressometer attached will damage it. Also ask what gauge length each instrument uses and whether it matches your standard, and how it clamps without marking or restraining the specimen. Ask us for the procedure with the instrument, and budget for spare parts.
Beyond the compression machine, the page points to two. The air entrainment meter measures the air content of fresh concrete, which matters wherever concrete will freeze, because entrained air gives expanding water somewhere to go; the usual pressure method needs calibrating with water before use and a correction for the aggregate, so ask which method the meter uses and how often calibration is repeated. The three-cell permeability apparatus shows how readily water passes through hardened concrete, which governs how fast chlorides and carbonation reach reinforcement; ask the applied pressure, how flow is measured, test duration and accepted specimen size.
Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.
Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.
Specifications for each item - the standard and version it is built to, consistency range, mould tolerance, tank control tolerance, machine capacity and loading-rate control - are confirmed in writing on the quotation. For verification or calibration certificates, standards or approvals, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing note: the page gives the range only as about forty items from CTM-0001 onwards with no closing code; the sand absorption cone with tamper is a fine aggregate test grouped under fresh concrete; and the Southard viscometer is listed but not described.
Digital Compression Testing Machine for Concrete Testing - The Digital Compression Testing Machine has been intended to address the issue for a basic, financial and dependable intends to test concrete for its compressive quality.. The design emphasizes simplicity, both of construction and operation, and makes the machine easy to use and maintain. The unit is compact, making its valuable for site applications. The digital machines are provided with a pace rate indicator to demonstrate pace rate on a Bar Graph. With a little experience, the pace rate can be physically adjusted while the test is in progress. The Complete Unit consists of : Loading Unit : The loading unit is of fully welded construction having a cross head, base and solid plates. The hydraulic jack is placed to the base. The platens of the machine are hardened, ground and polished. The upper platen is provided with self-aligning action. To facilitate testing of various size specimens, suitable size spacers are provided complete with ball seating arrangement. Pumping Unit : The two speed pump facilitates rapid approach of the platens for daylight closure and also provides comprehensive control over the application of load. A control valve provides fine control over the loading rate for accuracy of pacing. The digital read-out unit, incorporates a 4-digit display, calibrated in kN and features integral load pacing in kN/sec. Maximum load is held and retained for approx 15 min, unless cancelled, using the panel mounted reset switch. Pace rate set for running the test can be maintained manually with the help of a bar graph indicator. Logged data printing facility through a parallel port interface is provided in the machine. Readings upto 100 complete runs/tests can be stored in the memory..
Small scale Controller Based Compression Testing Machine for Concrete Testing - Operation of Micro Controller based Compression Testing Machine are controlled by an astute Pace Rate Controller. This offices Automatic Pace Rate Control, Data Logging, Data Printing, Load Hold and so forth. It has an entire 3 term PID criticism control which utilizes a high torque Stepper Motor. It comprises of a Loading Unit, an Electrically Operated Hydraulic Pump and an Intelligent Pace Rate Controller. Miniaturized scale Controller based Compression Testing Machine is accessible in all models from 50kn to 3000kN limit. Notwithstanding every one of the highlights of Compression Testing Machine with advanced show, this machine has programmed pace rate control with the office of information logging, stockpiling and printing for examination. The operation of the machine is nitty gritty in the working manual provided with the machine. The operation is easy to use with a menu driven interface and prompts for an administrator. Stacking Unit : The stacking unit is of completely welded development having a crosshead, base and strong side plates. The water driven jack is settled to the base. the platens of the machine are solidified, ground and cleaned. The upper platen is given self-alinging activity. To encourage testing of different size examples, appropriate size spacers are furnished contend with ball seating plan. Pumping Unit : The pumping unit has two velocities. It can direct oil from an oil supply, fitted with an oil filler plug-cum-dipstick and a deplete plug. The pump is driven by an electric engine which must be associated with 220 Volts, Single Phase, 50 Cycles A.C. Supply through an intersection box accommodated the reason, at the back of the pumping unit. The unit additionally contains two programmable engines for pace rate control and the opening and shutting of the discharge valve. It is additionally given manual discharge to be utilized as a part of instance of a power cut or some other crisis. Extraordinary Features : 1. Programmed Pace Rate Control at a preset esteem. 2. Programmed Data Logging. 3. Logged Data Printing Facility. 4. Information Storage for upto 150 runs. 5. Multifunctional LCD interface. 6. Menu Driven interface. 7. Auto Shut down office. 8. Load hold office. 9. Manual crisis stop catch. 10. Pinnacle stack record. 11. Visual chart Display for on-line checking of the nature of control. 12. Programmed control of the pump engine. 13. Programmed show of breaking load toward the finish of the test. 14. Ongoing Clock to monitor the date, time and runs. 15. Alignment checking office. 16. Support for an extra pressure or flexure units (discretionary)..
Programmed Compression Testing Machine for Concrete Testing - The Automatic Compression Testing Machine is a completely mechanized rendition of the manual/self-loader Compression Testing Machine. The machine is accessible in 500kN, 1000kN, 2000kN, 3000kN, 5000kN Ranges. It has arrangement for consequently turning the pump on and off, controlling the set pace rate and turning the machine off under foreordained conditions. The Control discharge the weight toward the finish of each run and reinitializes the machine toward the start of each test. The pace rate is kept up by methods for full three term PID input control utilizing high torque stepper engines and drivers sets. Information procurement, stockpiling, administration and examination are on the whole completely robotized. The heap determination is for is 0.1kN for machines upto 1000kN limit and 1.0kN for the 2000kN, 3000kN and 5000kN Machines. The entire unit contains: Loading Unit : The stacking unit is of completely welded development having a cross head, base and strong side plates. The pressure driven jack is settled to the base. The platens of the machine are solidified, ground and cleaned. The upper platen is given self-adjusting activity. To encourage testing of different size examples, appropriate size spacers are given finished ball seating plan. Pumping Modlule : This has a two-speed water driven engine driven pump and a reinforced strain gage based weight transducer. Computerized Head : This contains all the electronic framework for controlling the pace rate, obtaining and putting away test-information, speaking with the PC and working the heap discharge engine. RS 485 to RS 232 Convertor : This change over information transmitted by the advanced make a beeline for a frame perceived by the PC. The framework is perfect with any PC with the accompanying: P-IV or more, 1.9Ghz 256 Mb RAM Intel Chipset with on-board illustrations card. 40 GB HDD 1.44MB FDD and CD ROM DRIVE Standard Keyboard 1 Serial Port 1 Parallel Port Printer HP 5550 or most recent UPS APC 500 VA or proportional.
compression Testing Machine (Pillar Type Load Frame) Hand Operated for Concrete Testing - These are four column sort load frames. Four strong columns are vertically settled to a solid base and at opposite end is settled a cross head. The stature of the cross head is additionally somewhat flexible. A gage 200mm is settled in the focal point of cross head. To the lower end of this lead screw is settled upper platen with a circular seat for self arrangement. At the focal point of the base plate is settled a jack, on the highest point of which the lower platen with the assistance of a focusing pin is kept. The separation between the upper and lower platen is variable by methods for the lead screw. A spacer piece is additionally provided with the heap outline. This spacer square which can be fitted on the highest point of the jack and underneath the lower platen by methods for focusing pins decreases the separation between the two platens. The platens are very much machined, cleaned and solidified. The lower platen has concentric scores to midway place the example. A clean cover for jack is provided to keep any going in the jack. Reaches: 50kn to 3000 kn..
compression Testing Machine (Channel Type Load Frame) Hand Operated for Concrete Testing - In these load frames "C" channels are utilized, they are welded at the top and additionally base and with stand high loads. A hydraulic jack is set at centre of the base of the load frame, over which can be fitted lower platen and spacer hinder with the assistance of centring pin. A lead screw goes through the highest point of the frame. To the lower end of this lead screw is settled the upper platen with round seat for self arrangement. The platens are precisely machined, solidified and cleaned. The lower platen depressions to accurately put the example. Note : The platens are typically rectangular on shape, however no exceptional demand square platens or roundabout platens can be provided at an additional cost. Reaches : 50 kN to 3000 kN.
Compression Testing Machine (Four Pillar Nut Model) Hand cum Electrical Operated for Concrete Testing - The load frame is made up of high quality steel construction with a fixed. Upper lead conveying a ball situated platen. 4 columns are settled to the base and the top plate of the loading frame. The upper and lower plates are balanced with the assistance of head screw on either side of the column. The smash dia of the machine shifts from the necessities of the client. The lower design are at the base of the casing over the smash and it is rectangular fit as a fiddle. Adequate freedom is given between the platens to fit in the round and hollow/3D square shape. Spacer gave to alter 3D squares and barrels. A 20 cm dia weight gage with most extreme load acceptance pointer is fitted on the best board and thusly is associated with the water driven weight pipe. On the correct hand a reassure is fitted inside which the electrical engine is fitted alongwith its coupling which inturn is associated with the pumping unit. A moderate/quick stacking rate controller settled on the highest point of the reassure for changing the rate of stacking. The machine is properly adjusted and gone subsequent to assessing and investigating it with a pressure level pointer is given as a plunge stick. Discretionary : 1. Additional gages can be joined to the machine (max. 3nos.), for better precision and results. 2. Electrical association can either be Single Phase on 220 V A.C., or Three Phase 440 V A.C. 3. Rectangular plates of different sizes on ask..
Flexure
Testing Machine for Concrete Testing - The Flexure Strength Testing is
designed to test the flexural strength of concrete beams. The design
provides maximum rigidity throughout their working range. The load is
applied by the downward movement of the piston. A spacer is for testing
different size of beams. The load is indicated on a calibrated bourdon
tube type load gauge of range: 0 - 100 kN x 0.5 kN (0- 1O,000 kg x 50
kg). The loading gauge is calibrated against National Council for Cement
and Building Materials Certified Proving Ring. Flexure Testing Machines
1. Lightweight, rugged high strength frame 2. Double action hydraulic
pump 3. Self-aligning roller assembly 4. Hydraulic jack provided with
retraction spring 5. For testing beams of 100 x 100 x 500mm and 150 x
150 x 700mm.
Compression
Testing Machine for Concrete Testing - Range of Semi-Automatic concrete
compression machines provide users the ability to test and analyses
concrete samples in accordance with all major international standards.
The power pack incorporates a durable variable output pump, allowing
fine control for accurate load pacing, or maximum pump output for
daylight closure. The rapid approach pump provides a high rate of
daylight closure and is available as an optional extra for the motorized
power pack- only if fitted at the time of ordering. An onboard LED
screen allows the sample load / Stress to be monitored. The control
panel allows for data input and manual control if required. Testers are
manufactured in the range of 300 kN - 5000 kN capacities. The standard
models are of 1150 kN, 2000 kN, and 3000 kN capacity. Suitable for
testing 50mm, 100mm, 150mm and 200mm cube samples as well as cylinder
samples with 75 160mm diameter and 150-320mm height. Pressure safety
valve, piston limit switch, removable front and rear gates are standard
on all models. Upper compression platens have ball seating assembly for
movement in all models. All compression platens have a surface hardness
of 55 HRC. Required distance pieces of 100mm, 50mm, and 20mm for
vertical test distance are supplied as standard in all models. Pressure
transducer with a sensitivity of %0.3 is used for load measurements. All
models operate with 220-240 VAC, 50 60 Hz, 1 phase mains power.
This apparatus is an automatic range of 2000 kN and 3000 kN capacity compression testing machines has been manufactured to meet the need for reliable and consistent testing of concrete samples. All our machines feature the complete automatic test cycle with a closed loop digital readout. Once the samples parameters have been introduced, it is sufficient to press the START button to complete the test. Compression machines comprises of the main parts: Frame, power pack and data acquisition & control system. Each part has been designed to manufacture machines with a high degree of mechanical stability Main Characteristics : # Automatic test cycle with standard Rapid Approach # Graphical - LCD Data Acquisition and Control System # Menu Driven Software for easy operation # Load vs time plot and instantaneous load rate displayed # Accurate load rate control within ±5 from 1 kN/sec to 20 kN/sec # Class 1 starting from % 10 of the full range # Data storage up to 256 tests # RS 232 output for printer or PC # PC software for test control and advanced report printout.
Permeability
Apparatus (Single Cell Model) for Concrete Testing - One of the
durability tests of concrete is used to know the permeability of water
through the sample. Permeability equipment is used for determining the
permeability of cement mortar and concrete samples of 15cm cubes cast in
the laboratory. Specification: The concrete permeability apparatus
consists of a brass/gunmetal cell of Square/Round cross-section mounted
on a stand and a pressure chamber is connected to the cell through
copper tubing and T-connector mounted on the stand with sleeve packed
valve and rubber hose pipe with end connections. The cell assembly
comprises of one base plate, one metal funnel, and one top plate. The
pressure chamber is fitted with a pressure regulator which helps in
regulating the pressure from 0-15kg/cm sq. Gauge is for indicating the
pressure in the cell. A foot pump and a pressure tube is supplied to
develop pressure in the chamber. The apparatus is supplied with a
measuring cylinder 500cc to measure percolated quantity to water.
Pressure can also be applied; by a pressure air line or by a compressor
which can be supplied at an extra cost..
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