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Geotextile / Geosynthetics Testing Instruments
MI.GE-1001 Thickness Gauge for geotextile
Meets: - ASTM- D 5199, EN-ISO-9863-1, IS-13162-3
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.
MI.GE-1003 Cross Permeability Test Apparatus
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.
MI.GE-1004 Permittivity Tester
Meets: - ASTM- D 4491 - 99a, IS-14324
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.
In Constant Head Test:- A head of 50 mm water is maintained on the geotextile throughout the test. The quantity of flow is measured versus time. The constant head test is used when the flow rate of water through the geotextile is so large that it is difficult to obtain readings of head change versus time in the falling head test.
In Falling Head Test:- A column of water is allowed to flow through the geotextile and reading of head changes versus time is taken. The flow rate of water through the geotextile shall be slow enough to obtain accurate readings.
MI.GE-1005 Dry Sieve Test Apparatus (Apparent Opening Size (AOS))
Meets: - ASTM D4751-87, BS-6906-2, IS-14294
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 Dry Sieve Test Apparatus.
MI.GE-1005001 Sieve Shaker Table top type
To make the process of sieving easier and quicker, electrically operated mechanical table top type sieve shakers are offered for dry sieving. These Sieve Shakers are popularly used not only in soil laboratories but also dry sieving the geotextile testing
MI.GE-1005002 Glass beads
The Beads of the following size is available in One Kg pack
MI.GE-1006 In-Plane Permeability Test Apparatus
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 permeamatre. 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.