High swell hydrophilic waterstop for in-situ concrete
Uses
Integral sealing for construction joints in concrete cast in-situ where high swell performance is demanded, such as in highly saline ground conditions.
Convenient and problem solving in situations where a conventional water stop would require complex shuttering.
Typical uses include secant piled and diaphragm walled basements, pile caps and casting against old concrete.
Supercast SW30 can provide simple solutions to detailing pipe entries, construction joints in the vertical plane and to kicker joints.
Can be linked to Supercast PVC* † water stops to give an effective combination of water stops which maintain network continuity.
Advantages
- Easy to install
- Supercast SWX swellable adhesive enables full integration of Supercast SW30 with Supercast PVC networks.
- Solves detailing problems in conjunction with Supercast PVC range
- Swelling properties unaffected by long term wet/dry cycling
- Performs effectively in saline ground conditions
- Sustains effective seal in wet conditions
Standards compliance
Suitable for use in contact with potable water – Water Byelaws Scheme Approved product.
Description
Supercast SW30 is a swellable waterstop that can be installed and positively linked into conventional Supercast PVC waterstop networks.
This allows the use of Supercast PVC for expansion joint sand Supercast SW30 for construction joints, all the time maintaining an integrated network.
Supercast SW30 is made from high performance synthetic elastomer strips. The high swelling action is the result of contact between water and hydrophilic groups which are part of the Supercast SW30 ‘Basic Polymer’ molecular structure.
The hydrophilic groups are not subject to extraction or loss of swelling performance by prolonged or repeated wetting. This is a unique feature of the basic polymer. Expansion of the waterstop creates a positive pressure against the face of the concrete joint, thus preventing water passing through the protected joint.
Design criteria
Supercast SW30 should be used to prevent the passage of water through non-movement joints in both new in-situ concrete and between new and existing concrete. Supercast SW30 increases in volume in the range of up to 500% and gives a resistance to hydraulic heads of up to 100 metres.
Swelling of Supercast SW30 in fresh concrete is minimal,therefore maximising the positive pressure to seal the joint.
Supercast SW30 is suitable for application between existing and newly placed concrete where there is little or no steel continuity and where up to 2mm movement may occur.
Supercast SW30 waterstops should be positioned to ensure that a minimum of 100 mm cover of concrete is present to accommodate pressure developed during the swelling process.
Specification
Supplier specification
Water swellable – Basic Polymer – hydrophilic waterstop (and attachments) where shown on the drawings, shall be Fosroc Supercast SW30 obtained from Fosroc. It shall be used in accordance with the manufacturer’s current application instructions.
