Milestone Instruments

Uttam Nagar, Delhi

The BCA (Chaplin) Abrasion Tester gives a guide to the abrasion resistance of concrete floors. It can also be used to test the effectiveness of surface treatments used to protect or upgrade sub-standard floors. The depth of wear in the concrete floor brought about by the action of 75mm diameter by 20mm wide hardened steel wheels is used as a guide to the abrasion resistance. The apparatus is suitable for compliance testing to the requirements of BS 8204: 1987: Part 2 and EN 13892-4. The abrasion tester consists of three 75mm diameter hardened steel wheels mounted tangentially on a circular steel carrier plate. The wheels are fitted such that they are free to rotate but not castor. The carrier plate is connected to a single phase electric motor which runs at approximately 190 rpm. mounted in a steel frame. An umbilical cable connects the electric motor to a small control box, which monitors the number of revolutions executed by the shaft of the motor. At the end of a preset number of revolutions, a counter in the control box switches off the power to the electric motor. During a test, the Abrasion Tester is completely covered by a Safety Enclosure which reduces the noise level and prevents access to the rotating parts of the machine. The enclosure has a Safety 'Off' switch and is also fitted with micro-switches at the bottom which switch off the Tester if the enclosure is raised. Electronic Depth Gauge A tripod gauge with a user selectable resolution of 0.01mm. the battery operated gauge is fitted with a zero button and an ON/OFF switch.

The BCA (Chaplin) Abrasion Tester gives a guide to the abrasion resistance of concrete floors. It can also be used to test the effectiveness of surface treatments used to protect or upgrade sub-standard floors. The depth of wear in the concrete floor brought about by the action of 75mm diameter by 20mm wide hardened steel wheels is used as a guide to the abrasion resistance. The apparatus is suitable for compliance testing to the requirements of BS 8204: 1987: Part 2 and EN 13892-4.

Thickness Gauge for geotextileThis is used for measuring the thickness of the geotextile. The thickness of the geosynthetic material can be measured with an accuracy of 0.001 mm (depend on the dial gauge accuracy) for thickness up to 10 mm with Foot pressure of 6.35 mm, 10 mm and 56.4 mm diameter. Dead weight mechanism is provided to apply desired pressure varying from 2, 20 to 200 kPa. Surface plate is grounded and is rust free to enable reproducible results.

It is used to determine the bursting strength of packaging material. The Bursting Strength Tester is designed to find bursting strength of fabricleatherpaperpaper board. Different models are available in the range. A test specimen is held between two annular clamps under sufficient pressure to minimize slippage.

These are used for testing the tensile strength and expansion of material like cables, wires, conductors, ferrous non- ferrous and packaging material. Further, by using relevant grips and combining correct transverse speeds, tests can be conducted on it and in addition, bending and compression tests can also be conducted on it. The machines are made in different capacities as per ISO, BS, DIN & ASTM standards. These are floor mounted and provide accurate data (accuracy within 1 +) on the physical properties of materials in a very quick and simple manner.

The double lever tensile testing machine for cement briquette is available in different ranges. Loading is applied automatically by lead shots flow in manually operated units and by a travelling weight on the lever in electrically operated model.

Two clamping systems 200 mm wide and 50 mm length in the direction of the applied force are mechanical wedge type and facilitate conducting Narrow Strip and Wide Width Tensile Strength tests as per many international specifications. These grips allow simple and rapid sample loading.

This test measures the ability of the geotextile to distribute concentrated loads. Specially devised clamps (25 mm wide) with a gauge length of 100 mm are placed across 200 mm square samples or 200 mm x100 mm samples. The sample is then subjected to tension at a specified rate until failure occurs. It is widely used by manufacturers as a quality control tool and as such is the most commonly reported tensile strength value. It can also be used for relative comparisons between geotextiles of the same type.

Geotextiles can be cut or punctured during field installation, which can create a possible condition by which strength is controlled by a tearing resistance. An outline of an isosceles trapezoid is marked on a rectangular specimen (150 mm x 75 mm) cut for the determination of tearing strength, (with a 6 to 9 mm cut) and the nonparallel sides of the trapezoid marked on the specimen are clamped in parallel jaws of the Tensile Testing System.

Fabric is clamped to give an inner diameter of 15 cm and a 50 mm CBR plunger is pushed centrally through a fabric at a specified rate. The load at failure is the push through load and when divided by the cross-sectional area of the plunger, gives CBR push through resistance.

The geotextile specimen is clamped to obtain an inside dia of 44.45 mm and force is applied through an 8 mm dia plunger till failure. The puncture strength so obtained is felt to reflect the fabrics ability to withstand aggregate penetration.

The pore pressure measuring apparatus consists of a screw pressure pump, null indicator in Perspex, pressure gauge, mercury manometer, volume change burette and the necessary connecting tubes and valves. It is used for measuring pore water pressure and pore air pressure in soils. It has many features, which simplify the operation. The Null Indicator is made from a transparent Perspex block. It is a simplified U-Tube Null Indicator, in which water can bypass mercury if null indicator is tilted; thus de-airing process by circulation of water is facilitated. All features enable a visual check to be made during the de-airing operation of apparatus. A mercury manometer and a pressure gauge of Bourdon Tube type are provided on the panel on which the whole equipment is mounted. Very small positive or negative pressures are observed on the manometer. A 50 ml burette is clamped to a sliding bracket on one side of the panel. It is used for measuring the volume change in the specimen when subjected to confining pressure in the triaxial cell The following models of Pore Pressure Apparatus are available: 1. Pore Pressure Apparatus, 1000 kPa (10 kg/cm2) Capacity The equipment consists of:

• Pressure Gauge, Bourdon Tube Type, Graduation: -1.0 to +10 bar in 0.1 bar division (or -100 to +1, 000 kPa in 10 kPa divisions) Dia: 200 mm
• Manometer, Glass U Tube, measures low positive and negative pore pressure and checks zero error of pressure gauge. It is provided with a mercury trap. (Mercury supplied at extra cost)
• Null Indicator, Perspex with mercury trap and cursor to indicate the mercury level
• Burette, 50 ml, for measurement of volume change in the soil specimen
• Pressure Pump, fitted with four Ball Valves
• Copper Coil
• Water Reservoir

For determining the scratch hardness of ready mixed paints and enamels, which is the minimum load required to produce a scratch showing the bare metal surface of the painted panel. The apparatus consists of a 1mm dia hemispherical stainless steel needle, fixed to a platform of a counter- balanced rod, which is assembled on a grooved platform. A rack moves through the groove, to which a painted panel can be clamped. An indicator lamp is provided to indicate the metal contact if the Needle penetrates the paint surface to make contact with the metal. Complete with 1 kg weight. Suitable for operation of 230 V, 50 Hz, single phase, AC supply.

The paint film is bent through 180 over a 6.35 mm dia rod and examined for any damage, detachment or cracking of the film. The tester consists of two plates hinged at one end with the help of a 6.35 mm dia rod. A stop is provided on one plate against which the painted panel can be held. Complete with x10 magnifier.

It is for determining the aggregate impact value and has been designed in accordance with IS: 2386 (Part 4), IS: 9377-1979. The sturdy construction consists of a base and support columns to form a rigid framework around the quick release trigger mechanism to ensure an effective free fall of the hammer during test. The free fall can be adjusted through 380 5 mm. The hammer is provided with a locking arrangement. Following model of Aggregate Impact Value Apparatus is available:

Tensile testing machines are designed for determining the Tensile Strength and Elongation of a host of materials like ferrous and non ferrous materials, cables & conductors, Plastic, PVC, Rubber specimens, paper, plywood etc. Our tensile testing machines are also capable for conducting compression, Cross breaking and Shear tests thus making them more versatile with a few additional attachments. tensile testing machines are available in various capacities depending upon the requirements right from 5 kgf to 10 Tonnes ensuring 1% accuracy in test results.