CASTECHPVC WATERSTOP/H
Extruded PVC Waterstop for Construction and Expansion Joints
CASTECH PVC Waterstop H is extruded from the best quality raw materials. Its design allows easy flow of concrete, and it is extremely flexible with an elongation of > 300%.
Overview
About
CASTECH PVC Waterstop H is extruded from the best quality raw materials. Its design allows easy flow of concrete, and it is extremely flexible with an elongation of > 300%. CASTECH waterstops have been installed in many projects across the Middle East, giving assured long-term performance in extreme conditions and preventing unwanted water penetration in concrete structures.
Typical uses
PVC waterstops are designed for water-retaining and water-excluding structures where a positive seal is required. Embedded in concrete, they span the joint to form a continuous, watertight diaphragm that prevents the passage of liquid through the joint. The waterstop must be properly selected and installed to accommodate joint expansion, contraction and other longitudinal and transverse movements, and must be resistant to any liquids to which it may be exposed.
Benefits
Advantages
Characteristics
- High tensile strength and elongation
- Unique design with a specific ribbed profile for effective water sealing
- Brass eyelets on edge flanges for tying to steel rebars (internal profiles)
- Heat weldable
- Non-toxic; suitable for use in contact with potable water
- Prefabricated intersections
- Excellent chemical resistance
- Non-staining; will not discolour concrete or produce electrolytic action
Technical data
| Width | 150, 200, 250, 300, 320, 350 mm |
|---|---|
| Web Thickness | 4, 10 mm |
| Specific Gravity (ASTM D792) | ≥ 1.35 |
| Tensile Strength (BS 2782) | ≥ 13.8 N/mm² |
| Elongation (BS 2782) | ≥ 300% |
| Shore A Hardness (ASTM D2240) | 85 ± 5 |
| BS Softness (BS 2782) | 40 – 50 |
| Resistance to Water Pressure @ 5 | Nil bar (BS EN 12390) |
| Water Absorption (ASTM D570) | < 0.2% |
| Chemical Resistance (ASTM D543) | pH 2.5 to 11.5 |
| Suitability with Potable Water (BS WRC) | Passes (non-toxic) 6920, |
| Standard Compliance | BS 2571, CRD-C 572- 74 |
Typical values. Refer to the TDS for full details and test conditions.
Application
Application
Fixing internally
Internal waterstops are positioned centrally within the concrete, with the centreline of the waterstop aligned with the centre of the joint, acting as a watertight diaphragm. Split formwork is recommended for slab-to-slab, slab-to- wall and wall-to-wall joints. Tie the waterstop to the reinforcement with wire through the eyelets on the end flanges so it is not misaligned or folded during the pour. One half is cast in the first pour and the other half projects into the second. A tight fit between waterstop and form prevents leakage of paste and honeycombing. and Expansion Joints Fixing externally External waterstops are installed before concreting. The external expansion joint profile is laid on the compacted grade or mud-slab and nailed or glued in position; the external construction joint (ECJ) profile is glued or nailed to the vertical shutter. Only the ribbed side is embedded in the concrete.
Jointing
Form a fully continuous waterstop network at bends and additional joints, using factory-welded junctions. Weld field butt-splices with a welding knife (220 – 240 V, ideally thermostatically controlled): cut the ends evenly with a knife, align them in a fixing jig with at least 25 mm protruding, place the knife between the ends until the PVC melts (> 140°C) and beads form, then remove the knife and press the ends firmly together until the PVC cools to a strong fusion-welded joint.
Packaging & storage
Storage & shelf life
Shelf life is 5 years from the date of manufacture when stored in original, unopened and undamaged packaging in a dry environment, away from direct sunlight and rain, between 10°C and 40°C. Extreme temperatures, high humidity, damaged packaging and contamination may reduce shelf life.
Health & safety
- Compact concrete properly around the waterstop to ensure full contact and seal
- Clean the waterstop surface of dirt and cement laitance that can affect the seal
- Clearance between waterstop and reinforcement should be at least twice the maximum aggregate size, to prevent voids and honeycombing
- Do not puncture the waterstop to allow reinforcement to pass through
- Protect installed waterstops from UV; prolonged exposure makes PVC brittle due to oil loss CASTECH PVC Waterstop H is a non-flammable and non-hazardous material. Take care when cutting and welding joints on site. Hydrogen chloride vapours are released during welding, so welding should be done in a well-ventilated area. Additional information: Refer to MSDS (available on request).
