Needle Punch,Multifilament Pp Geo Technical Textile , For Soil Stabilization

In separation functions Geotextiles keep fines in the subgrade from migrating into the base course. Tests show that it takes only about 20% by weight of subgrade soil mixed into the base course to reduce its bearing capacity to that of the subgrade. This problem usually is due to the movement of large amounts of water. When large loads cross the surface of the roadway they set up a pumping action which accelerates this water movement and soil particle migration, and speeds up the failure of the road.Two important criteria for selecting a Geotextile for separation are permeability and strength. The Geotextile used for separation must allow water to move through it while retaining the soil fines or sand particles. It should let water pass through it at the same rate or slightly faster than the adjacent soil. It must also retain the smallest soil particle size without clogging or plugging. Figure 4 is a diagram of the application of a Geotextile as a separator