Nylex Cordrain

Geocomposite Drainage Layer

Nylex Cordrain provides an efficient, economical vertical drainage of walls and other subground structures.

Cordrain has been specifically designed to reduce hydrostatic pressure behind structures such as retaining walls and bridge abutments. It is also ideal for draining foundations and basements, reducing the likelihood of structural damage caused by foundation movements in expansive soils. The impermeable core provides the added benefit of assisting in the waterproofing of structures which may reduce the functional requirement of a tanking membrane.

Nylex Cordrain Product Description:

Cordrain is a geocomposite vertial drainage blanket which consists of a plastic cuspates inner core (cuspation on both sides) over wrapped with a heat-bonded, non-woven geotextile filter fabric bonded on one side only.

Cordrain Applications:

• Building basement / cellars
• Retaining walls
• Bridge abutments
• Culverts
• Tunnel Lining

Design Benefits of Nylex Cordrain:

• High Flow drainage capacity
• Effectively reduce hydrostatic pressure behind structure walls
• Provide an airlock between drainage layer and wall
• Assist in the waterproofing of structures
• Non-clogging
• High compressive strength
• Reduce the likelihood of structural damage caused by foundation movements in expansive soils

Economic Benefits of Nylex Cordrain:

• Cost saving
• Typically eliminates the need for aggregate or sand backfill.
• Lightweight and flexible
• Easy to handle and quick to install.

How Cordrain Works:

Cordrain is wrapped with a heat-bonded non-woven geotextiile and in the vast majority of soil the geotextile ensures stable filtration of the adjacent soil.

A soil filter develops within the first few millimetres between the soil mass and the geotextile. As water passes from the original soil into the drain, it washes a few small particles for a short period of time after installation.

As the small particles are washed through, a bridging network of larger particles builds up against the geotextile. This network prevents further small particles from eing washed through, stabilizing the soil and allowing only water to pass through the system.

Product Specifications of
Nylex Cordrain

9kN/m MD 8kN/m D

>1000Nmm^0.5

25m

Cordrain /18 for ASD HKSAR - Construction of Education Resource Centre Communication Public Transport Interchange at Kowloon Tong

Cordrain /18 for ASD HKSAR Project

Departmental Quarter at Lai Chi Ling Road

Cordrain /18 for Hong Kong Housing Society

Hung Hom Bay Development