Applications
- Waterproofing casting and header joints in concrete.
- Waterproofing pipe lead-throughs.
- Waterproofing joints between prefab concrete elements.
- Waterproofing around all sorts of lead-throughs and construction joints (stationary joints).
- Connecting joints.
Advantages
- Easy to install.
- Swelling properties unaffected by long term wet/dry cycling.
- Delayed swell action allows extra tolerance on site.
- Sustains effective seal in wet conditions.
- Keeps its shape completely without splitting or cracking, even at maximum swelling. In addition, the elastomeric properties are maintained in this maximum swelling state.
- Contains no traces of bentonite.
Description
The JHSW is a HYDROPHILIC SWELLABLE WATERBAR which can be installed and positively linked to conventional PVC waterstop. This allows the use of PVC waterstops for expansion joints and JHSW for construction joints.
The JHSW is made from high performance Composition and is a hydrophilic swell strip consisting of an acrylate-based polymer swelling substance & copolymer-based thermoplastic elastomer.
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.
Shelf Life
Minimum 2 years if in original packaging, dry and frost-free.
Typical Properties
| Property | Specification |
|---|---|
| Form | Rectangular section elastomeric strips |
| Standard dimensions | 20mm x 10mm x 10m, 20mm x 05mm x 20m, 10mm x 10mm x 20m |
| Solid content | 100% |
| Unrestrained volumetric expansion | Up to 300% |
| Application temperature range | -20°C to 50°C |
| Service temperature range | -30°C to 70°C |
| Hydrostatic pressure resistance | Up to 60 metres (6 bar) |
Note: JHSW swelling profiles can be manufactured in widely varied dimensions and shapes on request.
Application Advice
- JHSW is applied to the middle of the construction joint. It is advisable to allow at least 8 cm of concrete on both sides of the expanding sealant to prevent cracks in the concrete.
- The joint sealant should be applied on a dry and smooth surface. When needed, the construction joint should be additionally smoothed out with swelling sealant. Fixation on the concrete surface can be done using adhesive and/or nails every 20 to 25 cm.
- The ends of the swell strips should be placed head-to-head against each other or with an overlap of 10 cm (between the inner and outer reinforcement).
- Do not use JHSW in expansion joints.