Facilities
About the Laboratory:
Geotextile laboratory provides
the testing of Geotextile material either woven or nonwoven and geosynthetic
material. There are various of testing facilities is available such as apparent
opening size tester (AOS), In plane water permeability tester, Gradient Ratio
tester, Cone drops tester and Direct shear/ pull out resistance tester in our
Geotextile laboratory.
Instrument
and Equipment available:
Sl. |
Instrument / Equipment |
Remarks |
1. |
Name of
the instrument |
Cone drops tester To
determine the resistance of Geotextile to penetration by a steel cone dropped
from height. The degree of penetration is an indication of the behaviour of
the geotextile when sharp stones are dropped on its surface. |
2. |
Model |
|
3. |
Photographs
of the Instrument |
|
4. |
Test
parameters |
|
5. |
Sample
Specification |
|
Sl. |
Instrument / Equipment |
Remarks |
1. |
Name of
the instrument |
Direct shear tester The
frictional shearing resistance at the interface between the soil and the
Geotextile enables the geotextile to resist pullout failure and allows
tensile forces to be carried by the soil/ geotextile composite structure. There
are two conventional laboratory tests to determine the frictional behaviour
of geotextile: - 1. Test method for measuring
geosynthetic pullout resistance in soil. 2.Test method for determining
the co- efficient of soil and geosynthetic or geosynthetic and geosynthetic
friction by direct shear method |
2. |
Model |
|
3. |
Photographs
of the Instrument |
|
4. |
Test
parameters |
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5. |
Sample
Specification |
|
Sl. |
Instrument / Equipment |
Remarks |
1. |
Name of
the instrument |
Apparent
opening size Tester This
test method is used to indicate the apparent opening size in a geotextile,
which reflects the approximate largest opening dimension available for soil
to pass through. |
2. |
Model |
|
3. |
Photographs
of the Instrument |
|
4. |
Test
parameters |
|
5. |
Sample
Specification |
|
Sl. |
Instrument / Equipment |
Remarks |
1. |
Name of
the instrument |
In plane water permeability
Tester This
test is necessary for drainage application. The permeameters can be of
parallel flow or radial flow type. In-plane permeability is known as
transmissivity which is defined as the volumetric rateof flow per unit width
of geotextile and unit hydraulic head. |
2. |
Model |
|
3. |
Photographs
of the Instrument |
|
4. |
Test
parameters |
|
5. |
Sample
Specification |
|
Sl. |
Instrument / Equipment |
Remarks |
1. |
Name of
the instrument |
Gradient ratio Tester This
test is necessary for filtration i.e. Soil- geotextile system permeability
and clogging potential – the tendency for fabric to lose permeability due to
soil particles that have either lodged in the fabric opening or have
restrictive layer on the surface of the fabric. |
2. |
Model |
|
3. |
Photographs
of the Instrument |
|
4. |
Test
parameters |
|
5. |
Sample
Specification |
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Er. Manisha Hanuamant Jagadale
Scientist, Mechanical Processing
Division
Email- Manisha.jagadale@icar.gov.in