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This is used for measuring the thickness of the geotextile. The thickness of the geosynthetic material can be measured with an accuracy of 0.002 mm (depend on the dial gauge accuracy) for thickness up to 10 mm. Dead weight mechanism is provided to apply desired pressure varying from 2 to 200 kPa Surface plate is grounded and is rust free to enable reproducible results.
Meets:- ASTM- D 5199, EN-ISO-9863-1, IS-13162-3

Method to determine the resistance of geosynthetics to penetration by a steel cone dropped from a fixed height, as a simulation of dropping sharp stones on their surface. Generally applicable to geosynthetics. However, the test principle may not be applicable to some types of products. The specimen is clamped between two steel rings. A steel cone (45° tip angle, 1000 g) is dropped from a height of 500 mm onto the centre of the specimen. The degree of penetration is measured by insertion of a graduated cone into the hole. Number of specimens: Five specimens are tested. If the material to be tested is known to have different characteristics on the two faces, then the complete test shall be carried out separately on each face
Meets:- EN-ISO-13433-2006

Permeability of a geotextile must be substantially greater than that of the protected soil, so that water can pass freely from the soil through the fabric without build up of hydrostatic pressure. A high value of the permeability of the geotextile also infers that partial clogging will not reduce the permeability. The constant head test is carried out using a head of 50 mm of water.
Optional
Overhead Tank
Loading unit, 300-kPa capacity

These test methods cover procedures for determining the hydraulic conductivity (water permeability) of geotextiles in terms of permittivity under standard testing conditions, in the uncompressed state. Included are two procedures: the constant head method and the falling head method.
Meets:- ASTM- D 4491 - 99a

The test involves sieving rounded particle sizes for which 5% or less by weight pass through the geotextile. The Apparent Opening Size (AOS) is defined as 'Retained On' size of that fraction expressed as a standard sieve number (size). The test is widely used for relative comparison amongst the geotextiles. Thus AOS is a means of correlating geotextile pore structure to an equivalent screen mesh size. The apparatus consist of a 20 cm dia brass frame with clamp, a receiver and a lid
Sieve Shaker and glass beads to be ordered separately.

Rounded Beads, made of glass, size 0.85 mm (passing 1 mm and retained at 0.85 mm)
Rounded Beads, made of glass, size 0.425 mm (passing 0.85 mm and retained at 0.425 mm)
Rounded Beads, made of glass, size 0.25 mm (passing 0.425 mm and retained at 0.25 mm)
Rounded Beads, made of glass, size 0.18 mm (passing 0.25 mm and retained at 0.18 mm)
Rounded Beads, made of glass, size 0.15 mm (passing 0.18 mm and retained at 0.15 mm)
Rounded Beads, made of glass, size 0.075 mm (passing 0.15 mm and retained at 0.075 mm)

This test is necessary for drainage application. The permeameters can be of parallel flow or radial flow type. In either case, flow occurs along the plane of the permeameters. In the apparatus, flow occurs radically outwards, from a central hole to the periphery of a circular specimen. The transmissivity is defined as the volumetric rate of flow per unit width of geotextile and unit hydraulic head.
Specifications

Flow: Radially outwards
Specimen diameter: 100 mm
Range of Pressure: Upto 800 kPa
Head of Water: Upto 30 cm

Optional
Overhead Tank
Loading unit, 300 kPa capacity

The evaluation of the tensile properties of geotextiles is of paramount importance not only in reinforcement application but also in all other uses. Important properties include stress-strain behaviour, ultimate strength in uniaxial tension (under different widths), creep, etc. Recent researches have made it clear that the measured stress-strain behaviour of geotextiles is significantly influenced by details of testing procedures like method of gripping the fabric, rate of deformation, sample size / aspect ratio, initial preload and fabric conditioning. Universal Testing System for Geotextiles enables determination of these properties under a variety of test conditions. The 100 kN capacity systems have speed ranges from 5 to 320 mm/min.

Digital Microprocessor control speed regulating unit provided with RS-232 port for PC connection and data will be displayed in excel format with the help of software provided
The following attachments are available for this system at extra cost

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 non-parallel sides of the trapezoid marked on the specimen are clamped in parallel jaws of the Tensile Testing System. Thereby, the separation of the jaws is continuously increased with simultaneous recording of the load, so the tear propagates across the specimen. The tearing strength is the value for estimating the relative tear resistance of different geotextiles or different directions of the same fabric.

Fabric is clamped to give an inner diameter of 15 cm and a standard 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. This gives the resistance of fabric to withstand localised pressure, which is particularly noticed in pavement systems.

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 fabric's ability to withstand aggregate penetration.
Meets: - ASTM D-3787
Specifications
Specimen diameter: 100 mm
Mould for compaction of soil: 10 cm dia x 11.2 cm high
Head of water: Upto 37.5 cm
Optional Overhead Tank

The percentage passing of different fractions determines the porometry of the geotextile investigated. In the Hydrodynamic Sieving Method, the geotextile specimen, loaded with a certain quantity of glass bead fraction, is continuously rotated in a water trough, forcing the glass beads to pass through the geotextile openings.
Glass beads to be ordered separately

Rounded Beads, made of glass, size 0.85 mm (passing 1 mm and retained at 0.85 mm)
Rounded Beads, made of glass, size 0.425 mm (passing 0.85 mm and retained at 0.425 mm)
Rounded Beads, made of glass, size 0.25 mm (passing 0.425 mm and retained at 0.25 mm)
Rounded Beads, made of glass, size 0.18 mm (passing 0.25 mm and retained at 0.18 mm)
Rounded Beads, made of glass, size 0.15 mm (passing 0.18 mm and retained at 0.15 mm)
Rounded Beads, made of glass, size 0.075 mm (passing 0.15 mm and retained at 0.075 mm)

This test method covers a procedure for determining the shear resistance of a geosynthetic against soil, or a geosynthetic against another geosynthetic, under a constant rate of deformation.
Meets:- ASTM D 5321 - 02,
Note: Direct shear apparatus is to be order separately.


Thickness Gauge
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Permittivity Test
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In plane Permeability
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Geotextile/Geosynthetics Testing Instruments