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.

 

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

 

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.

 

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.

 

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.

 

Contact Person:

Er. Manisha Hanuamant Jagadale

Scientist, Mechanical Processing Division

Email- Manisha.jagadale@icar.gov.in