IZOMAX® STB PVC-A
IZOMAX® STB PVC-A is a flexible waterstop based on modified PVC with a centre bulb, installed within the concrete section on the joint axis to seal expansion joints in reinforced concrete structures. The centre bulb accommodates expansion, contraction and shear movements in the joint without inducing stress in the waterstop. With cross-sections from 20–30 cm in width and 5–10 mm in thickness, it is designed for structures exposed to high hydrostatic pressure and large joint movements.
Areas of Application
• Expansion joints in dams, irrigation canals and hydroelectric power structures
• Water tanks, reservoirs and water treatment plants
• Swimming pools and thermal pools
• Expansion joints in metro, tunnel and viaduct structures
• Raft-foundation-to-wall connections exposed to high water pressure
Advantages
• Offers high movement capacity thanks to its centre bulb
• Suitable for high water pressure with cross-sections up to 10 mm thick
• Anchoring ribs key the waterstop into the concrete and prevent pull-out
• Can be welded easily and homogeneously on site with heating-element (hot plate) welding equipment
• Produced from high-quality modified PVC for a long service life
• Resistant to ageing, alkaline environments and natural groundwater
• Forms a continuous sealing system with T, L and X junction pieces
|
Material composition |
PVC – Modified Polyvinyl Chloride |
|
Joint type |
Expansion joint |
|
Tensile strength (EN ISO 527-1 / -3) |
≥ 10 N/mm² |
|
Elongation at break (EN ISO 527-1 / -3) |
≥ 300 % |
|
Elongation at break, −20 °C (EN ISO 527-1 / -3) |
≥ 200 % |
|
Tear strength (ISO 34-1) |
≥ 12 N/mm |
|
Shore A hardness (ISO 48-4) |
75 ± 5 |
|
Density (EN ISO 1183-1) |
1.27 g/cm³ |
|
Water absorption by mass (EN ISO 62) |
≤ 1.5 % |
|
Ash content by mass (ISO 3451-1) |
≤ 5 % |
|
Softening point |
+42 °C – +52 °C |
|
Service temperature range |
−35 °C / +55 °C |
|
Standard |
TS 3078-1 / TS 3078-2 (DIN 18541-1 / DIN 18541-2) |
The values stated above are measured at +20 °C and 50 % relative humidity.
Dimensions
|
Type |
Width (cm) |
Thickness (mm) |
Weight (kg/m) |
Roll Length (m) |
|
A 20/5 |
20 |
5 |
2.35 |
20 |
|
A 25/8 |
25 |
8 |
4.2 |
15 |
|
A 23/10 |
23 |
10 |
4.2 |
15 |
|
A 30/6 |
30 |
6 |
3.8 |
15 |
|
A 30/10 |
30 |
10 |
5.55 |
15 |
The values given in the tables are based on our experience and on the correct placement of the waterstop in the concrete. Cross-sections other than those listed can be produced on request.