Description of waterstop band:
waterstop band made of quality SBR (styrene butadiene rubber), neoprene rubber or natural rubber, is one of the widest types for concrete structure to prevent liquid leaking in or out. Generally, designed to be cast in the concrete, rubber waterstops are ideal for applications where high physical properties of rubber are required. For example, reservoirs, dams andother water retaining or excluding applications with high movements or water pressure.
Materials properties of waterstop band:
SBR and neoprene rubber, as the most common materials for waterstop band manufacturing, are used extensively in United States and the worlds. The SBR water stop is preferred for water containment, while neoprene rubber waterstops band are recommend for applications of sewage disposal or chemical industries. As your request, natural rubber, EPDM, Nitrile and Silicone waterstops are also available.
| Physical properties |
Test methods |
SBR |
High tensile neoprene rubber |
Natural rubber |
| Water absorption 2 days at 70°C (% change) |
ASTM D-471 |
5% (max) |
5% (max) |
5% (max) |
| Hardness shore A |
ASTM D-2240 |
65 |
65 |
65 |
| Tensile strength |
ASTM D- 412 |
3000 psi (min) |
2500 psi (min) |
3500 psi (min) |
| Tensile strength at 300% Modulus |
ASTM D-412 |
1150 psi (min) |
1150 psi (min) |
1450 psi (min) |
| Ultimate elongation |
ASTM D-412 |
450% (min) |
450% (min) |
500% (min) |
| Compression set 22 hours at 70°C (% original deflection) |
ASTM D-395 |
30% (max) |
40% (max) |
30% (max) |
| Accelerated aging 96 hours at 70°C (% of tensile strength before aging) |
ASTM D-573 |
80% (min) |
80% (min) |
80% (min) |
| Accelerated aging 96 hours at 70°C (% of elongation before aging) |
ASTM D-573 |
80% (min) |
80% (min) |
80% (min) |
| Ozone resistance 7 days at 50 PPHM at 70°C, 20% elongation |
ASTM D-1149 |
No crack |
No crack |
No crack |
Applications of waterstop band:
1.Ideal for high movements joints.
2.Water containments.
3.Water excluding.
4.Tunnels and civil engineering structures.
5.Water and waste treatments.
6.Dams, reservoirs, and spillway.
7.Chemical areas.
8.Irrigation canals, sea walls and culverts.
Main types:
1.Dumb bell type waterstop band, with flat web section, are ideal for construction and partial contraction joints with little or no movements.
2.Center bulb type waterstop band, as its name implies, features its center bulb which makes it ideal for contraction and expansion joints including high lateral, transverse and shear movements. Meanwhile, it is perfect for withstanding the subsidence of the joints.
Installation:
All the waterstops band are designed to cast in the concrete as an integral joint sealing system. Pre-fabricated waterstops are also supplied to reduce site jointing.
| Physical properties parameter of Waterstop band: |
| no |
Items |
index |
| |
|
B |
S |
J |
| 1 |
Rigidity, Shore A |
60±5 |
60±5 |
60±5 |
| 2 |
Tensile strength ,M Pa ≥ |
15 |
12 |
10 |
| 3 |
Snap and elongation,% ≥ |
380 |
380 |
300 |
| 4 |
transmutation |
70ºC×24h,% ≤ |
35 |
35 |
35 |
| |
|
23ºC×168h,% ≤ |
20 |
20 |
20 |
| 5 |
Tear strength 21 ,KN/m ≥ |
30 |
25 |
25 |
| 6 |
Brittleness temperature,ºC ≤ |
-45 |
-40 |
-40 |
| 7 |
Air aging 31 |
70ºC×168h |
Rigidity, HA ≤ |
8 |
8 |
-- |
| |
|
|
Tensile strength,MPa ≥ |
12 |
10 |
|
| |
|
|
Snap and elongation,% ≥ |
300 |
300 |
|
| |
|
100ºC×168h |
Rigidity, HA ≤ |
-- |
-- |
8 |
| |
|
|
Tensile strength,MPa ≥ |
|
|
9 |
| |
|
|
Snap and elongation,% ≥ |
|
|
250 |
| 8 |
Ozone aging 50pphm: 20%, 48h |
2grade |
2 grade |
0 grade |
| 9 |
Rubber and metal bonding |
In vivo sections flexibility |
| remark: |
| 1.Rubber and metal bonded items apply only to the edge of water stop which include steel. |
| 2.If there is other special needs,we can discuss. |
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