Functions of geosynthetics filtration

The use of geotextiles in filter applications is probably the oldest, most widely known, and most used function. A geotextile can be structured to be a filter, so that liquids can pass through its thickness (i.e. across the plane of the material) while preventing the passage of soil particles from the upstream 

Filtration permit liquid to pass through its plane while blocking the path of soil particles 

Fines moving with water fiow into coarser aggregates Aggregate 

2 Filtration function (a) Without geotextile and (b)With geotextile. 

From the above description of the basic geo-filtration mechanism, it becomes evident that the performance of geotextiles as filter media depends largely on two properties the material s cross-plane permeability and pore-size characteristics. 

---