Gradient Ratio Test Apparatus
Product Code : JA-GT-9863
The Gradient Ratio Test Apparatus (SKU JA-GT-9863) gives a direct measure of the clogging potential of a geotextile used as a filter against soil. The gradient ratio is the hydraulic gradient through the geotextile plus the 25.4 mm of soil next to it, divided by the hydraulic gradient through the adjacent 50.8 mm of soil, and it is determined after 24 hours of flow. It is supplied by JaincoLab for geosynthetics, geotechnical and civil engineering laboratories.
Specifications
The apparatus measures hydraulic gradients across the geotextile with 25.4 mm of soil and across the adjacent 50.8 mm of soil after 24 hours of flow; permeameter size, piezometer tappings and water supply are not listed in the product data and are confirmed on the quotation.
| Product | Gradient Ratio Test Apparatus |
| SKU | JA-GT-9863 |
| Property | Gradient ratio (clogging potential) |
| Definition | Gradient through geotextile plus 25.4 mm soil / gradient through adjacent 50.8 mm soil |
| Test duration | Determined after 24 hours of flow |
Experiments with the gradient ratio apparatus
Students place soil over the geotextile, run water through the column for 24 hours and read the piezometric heads to calculate the gradient ratio.
- Clogging potential of geotextile filters
- Soil-fabric filter compatibility
- Drainage and filter design checks
- Comparing geotextiles with a given soil
- Geosynthetics and geotechnical practicals
Scope of supply and ordering
This listing covers the gradient ratio test apparatus as described. Accessories, spares and quantities are confirmed on the quotation. Soil, water supply and head measurement accessories are confirmed on the quotation.
Lead time, MOQ and packing are set on each quotation for the ordered quantity and delivery destination. The Gradient Ratio Test Apparatus can be ordered for a single laboratory or as part of a complete laboratory package for a college or training programme.
Frequently asked questions
What does the gradient ratio show?
The clogging potential of a geotextile filter with a particular soil.
How is it defined?
Gradient through the geotextile plus 25.4 mm of soil divided by the gradient through the adjacent 50.8 mm of soil.
When is it measured?
After 24 hours of flow.
Related products
- Long Term Flow Test Apparatus
- Cross Permeability Test Apparatus
- Geotextile Permeameter
- Dry Sieve Test Apparatus
For a complete geosynthetics laboratory, see the geotextile testing equipment range.
Request a quote
To get a quotation for the Gradient Ratio Test Apparatus, send SKU JA-GT-9863, the quantity and the delivery destination through the JaincoLab contact page or email [email protected]. Institutions and contractors buying under a tender can also reach us via the tenders page.
