DRAINAGE COMPOSITES

Introduction:
Drainage composites are made by combining two or more geosynthetic materials to achieve multiple functions like

• Filtration - Drainage,
• Filtration – Separation- Drainage,
• Filtration – Separation – Drainage – Protection
• Filtration – Separation – Drainage – Protection - Impermeability

These are highly robust which allows them to withstand high degree of stress during installation, it adapts perfectly to uneven surfaces due to its light and flexible make and are easy to transport and store. These drainage composites are long-lasting as they are imperishable, chemically inert, resistant to microorganism, resistant to oxidization, insensitive to atmospheric agents, insensitive to salt water etc. These usually comes as drainage nets which are both biaxial and triaxial, both these net comes with geotextile on one side, on both sides, geotextile on one side and impermeable membrane on the other side, which act as waterproofing material.

Functions of Drainage Composites

Primary Function

Drainage
High drainage capacity, even on minimum slopes and when subjected to high loads.

Secondary Function

Protection
Provide effective protection to waterproof membranes or impermeable liners.

Filtration

• Filters liquids perfectly, preventing passing of fines.
• Prevents silting of collector pipe.

Impermeability
Provide waterproofing in underpasses, Cut and Cover Tunnels, Concrete walls and Roof Gardens.

Separation
Provide effective Separation between dissimilar soil layers.