Separate – Filter – Reinforce – Protect – Seal
The significance of geosynthetics has been on the increase since the 1950s. In earth work and soil mechanics, they are indispensible components when it comes to functionality and efficiency in comparison with conventional methods of construction.
Geosynthetics can be divided into 5 functional areas:
Nonwoven materials, webbing and composite materials act as a separating layer between two ground layers and prevent them from mixing.
Drainage systems mostly consist of a combination of a filter and drainage layer. Systems made from geosynthetics can replace costly mineral drainage layers. This enables fluids and gases to be extensively captured and for them to be channelled off via the drainage system.
Geotextile filters hold back fines (soil or other particles) whilst, at the same time, maintaining filtering capability. The filters are classified by mechanical stability (capacity to hold back soil) and hydraulic filtration efficiency.
When used as reinforcement for soil layers, geosynthetics absorb the tractive forces which exist there and, thus, improve the mechanical properties of the ground layers. It is mostly geogrids and webbing that is used for this purpose.
Geosynthetics as sealing elements? Of course. Natural bentonite embedded in geosynthetics creates a natural seal. So-called geosynthetic clay liners (bentonite mats) are usually a real technical and economical alternative to conventional mineral seals.