Supercast SW20 Price in Bangladesh

Description

Uses:

Supercast SW20

Integral sealing for construction joints in concrete cast in-situ where conventional water stops are impractical to use because of limited access. 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. Superfast SW20 can provide simple solutions to detailing pipe entries, construction joints in the vertical plane and to kicker joints. Can be linked to Superfast PVC*† water stops to give an effective combination of water stops which maintain network continuity.

Advantages

• Easy to install by bonding, nailing or casting into joint faces
•  Factory made connectors enable full integration of
  Supercast SW20 and Supercast PVC networks
•  Solves detailing problems in conjunction with Supercast PVC range
• Swelling properties unify acted by long term wet/dry cycling
• Tolerant of salts present in concrete and ground water
• Sustains eff active seal in wet conditions

Standards compliance:
Suitable for use in contact with potable water – Water Byelaws Scheme Approved product: Listing No. 9312507.Description
The Supercast SW20 is a swellable waterstop which can be installed and positively linked into conventional Supercast.

PVC waterstop networks:
This allows the use of Supercast PVC for expansion joints and Supercast SW20 for construction joints all the time maintaining an integrated network. The Supercast SW20 is made from high performance synthetic elastomer strips. The swelling action is the result of contact between water and hydrophilic groups which are part of the Supercast SW20 ‘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 ofthe concrete joint, thus preventing water passing through the protected joint.

Design criteria:
Supercast SW20 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 SW20 increases in volume up to a maximum of 200% and gives resistance to hydraulic pressure. Swelling of Supercast SW20 in fresh concrete is minimal and most of the volume swell takes place after the initial setting of the concrete has taken place. Supercast SW20 is suitable for application between existing and newly placed concrete where there is little or no steel continuity and therefore some small movement may occur. Supercast SW20 waterstops should be positioned to ensure that a minimum of 70 mm cover of concrete is present to accommodate pressure developed during the swelling process.

Specifi cation
Supplier specifi cation
Water swellable – Basic Polymer – hydrophilic waterstop (and attachments) where shown on the drawings, shall be Fosroc Supercuts SW20 obtained from Fosroc. It shall be used in accordance with the manufacturer’s current application instructions.

Performance specifi cation
Water swellable – Basic Polymer – hydrophilic waterstop, where shown on the drawings, shall be made from a preformed elastomeric strip which can integrate into existing waterstop networks. It shall be free from rubber, bentonite or other inclusions. The waterstop shall have an unrestrained volumetric expansion of up to a maximum of 200%. It must not deteriorate under prolonged wet/dry cycling. It must be able to withstand a hydrostatic head of 100 meters (10 bars). It shall be used in accordance with the methods given in the manufacturer’s current data sheet.

Instructions for use:
Supercast SW20 may be positioned by bonding an appropriate adhesive. The waterstop may be installed either into a groove cast in the concrete or directly onto the concrete surface. Nailing may also be used. Full application instructions (Ref: FOS/1522), including the use of the ancillary products, are contained in a separate application leaf et which is available on request.

Estimating
Supply
Supercast SW20: 5 m rolls

Storage:
When stored in cool dry conditions, away from sunlight, in the original, unopened containers all products have a shelf life of 12 months.