High compressive strength, pre-fabricated geocomposite drain consisting of a studded polystyrene core covered with a heavy duty, needle punched, non-woven polypropylene filter fabric
- Superior compressive strength - studded core accepts structural and traffic loads, allows water to flow to designated drainage collection points.
- High flow capacity - drains 3 litre/sec/metre width.
- Simple, reliable drainage membrane - collects and controls percolated water under surfacing on podiums, trafficked decks, bridge decks, pipe bays, service ducts, planters on suspended or elevated roof areas, and basements.
- Rot proof - unaffected by permanent immersion in water, bacteria, dilute acids and alkalis.
- Cost effective - replaces expensive aggregate drainage layers or preformed drainage tiles and reduces dead loadings.
- Non-woven filter fabric - allows water to pass into the drain core while restricting the movement of soil and silt particles.
- Enhances waterproofing - conveys water away from waterproofing membrane and eliminates hydrostatic pressure build-up.
- Lightweight - easy to install, hand laid without equipment
Hydroduct® 650 is a high compressive strength, two-part, preformed geocomposite drainage sheet system, comprising a hollow studded polystyrene core covered on one side with strong non-woven polypropylene filter fabric. This robust drainage composite has been developed to provide a simple, reliable drainage system for collecting and controlling water under roof/podium finishes or used as a dewatering or permanent drainage system beneath basement structures.
The high 862kN / m2 compressive strength of the sheet is capable of taking structural loadings whilst supporting insitu concrete and all types of cementitious or loose laid finishes.
Hydroduct 650 is designed to withstand traffic loadings and provide a high water flow capacity of 3 litre/second/metre width. The tough construction of the studded sheet makes it particularly useful on podium decks where a mixture of traffic surfaces are combined with landscape areas and planters. When installed it will prevent a build-up of water against the waterproof membrane to enhance its overall security and increase the factor of safety of the structure.
The drainage sheet should be laid on top of the waterproof membrane and protection as soon as possible to prevent mechanical damage from other trades. The roof/podium slabs should have adequate falls so that the collected water is carried towards the drainage gullies and channels in accordance with standard practice.
|Property||Test Method||Typical Value|
|Polymer||N/A||High Impact Polystyrene|
|Thickness||ASTM C 366-B||9.5mm|
|Compressive Strength||ASTM D 1621||860kPa|
|Flow Rate||ASTM D 4716||3.0 litre/sec/metre width|
|Weight||ASTM D 3776||270g / m2|
|Tensile Strength||ASTM D 4632||900N|
|Trapezoidal Tear||ASTM D 4533||360N|
|Mullen Burst||ASTM D 3786||2750 kPa|
|Puncture Strength||ASTM D 4833||59 kg|
|Apparent Opening Size||ASTM D 4751||0.147mm (100 U.S.sieve)|
|Permittivity||ASTM D 4491||3260 Litre/min/m2|
1.22m x 15.25m long roll
|Storage||Keep under cover in original wrapping and cover immediately after installation|
|Bitustik||150mm x 15.0m long rolls|
|Cut Fasteners||3 per roll of Hydroduct required|
Equipment by Others
Stanley knife for trimming.
Can be laid directly under basement slabs or over Bituthene and with Servipak protection boards to prevent mechanical damage.
The geotextile filter fabric is always laid towards the water face to allow water entry. The sheets can be joined by overlapping the geotextile fabric and butt jointing the studded sheet. Cut Fasteners are then used to form a connector at centres to suit application by interlocking a minimum of two dimples on each sheet underneath ie. on the non-fabric face.
Butt and Cut Jointing
Simple butt joints can be made by carefully separating the geotextile fabric and making a weathered overlap and fastening the joints using Cut Fasteners which interlock to form a connector at centres to suit application.
Hydroduct 650 can be generally bent on site to form internal corners. External corners are formed by cutting the dimpled sheets at corners and providing an additional 100mm wide strip of the fabric to wrap around corner and overlap joint then bonding with Bitustik.
Installation with drainage pipes
Peel back geotextile fabric from studded core. Place drain pipe against core, wrap with fabric and tuck behind core to hold in place prior to backfilling or concreting.
All exposed edges of Hydroduct 650 should have extra fabric tucked behind core to seal the leading edge to prevent debris or silt from entering the core.
A variety of surface finishes can be laid directly on top of Hydroduct 650 without affecting its performance or that of the surfacing. Concrete slabs, block/paving on sand beds, and growth medium for planters etc are all acceptable since the geotextile filter has been specially treated to prevent bonding or clogging.
Hydroduct 650 drainage system shall be placed, fixed and terminated at the correct position to suit the relative levels and installed in accordance with the manufacturer’s instructions and supplied by GCP Applied Technologies. For further information contact your local GCP representative.
For assistance with working drawings for projects and additional technical advice, please contact GCP Applied Technologies.
Health and Safety
Refer to relevant Material Health and Safety data sheets.
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Last Updated: 2020-04-06