The rubber waterstop is made of natural rubber or various synthetic rubber as the main raw material, mixed with a variety of additives and fillers, and through the processes of plasticization, mixing, calendering and vulcanization. The water stop material has good elasticity, wear resistance, aging resistance and tear resistance, strong adaptability to deformation, good waterproof performance, and the temperature range is - 45 ℃ - + 60 ℃. When the temperature exceeds 70 ℃, and the rubber water stop is subject to strong oxidation or erosion by oil and other organic solvents, the rubber water stop shall not be used.
Product Detail
Function and principle of waterstop:
Rubber waterstop uses the high elasticity of rubber to produce elastic deformation under various loads, so as to play a solid seal, effectively prevent water leakage and seepage of building structure, and play a role of shock absorption and buffering. In many engineering architectural designs, there are certain expansion requirements between civil engineering and water and soil structures, and there are problems such as waterproof and shockproof. Therefore, the use and installation of rubber waterstop is an effective means to solve the above problems.
Application:
Water conservancy and hydropower projects,
Dams and culverts,
Tunnels and civil air defense projects,
Slabs on ground
Technical Parameters:
| NO. | TEST ITEM | TECHNOLOGY REQUIREMENT | UNIT | ISO | ||
| 1 | HARDNESS (SHORE A) | 60±5 | SHORE A | ISO7619 | ||
| 2 | TENSILE STRENGTH | ≥15 | MPA | ISO37 | ||
| 3 | ELONGATION AT BREAK | ≥450 | % | ISO34 | ||
| 4 | COMPRESSION SET | 70℃×24H | ≤30 | % | ISO815 | |
| 23℃×168H | ≤20 | % | ||||
| 5 | TEARING STRENGTH | ≥30 | KN/M | ISO34 | ||
| 6 | BRITTLENESS TEMPERATURE | ≤-45 | ℃ | ISO812 | ||
| 7 | ADHESION STRENGTH Of Canvas | ≥104 | N/CM | ISO 07517 | ||
| 8 | OZONE AGING(50PPHM, 20%ELONGATION, 40℃×48H) | NO CREAK | --- | ISO1431/1 | ||
| 9 | AIR AGING | HARDNESS CHANGE (SHORE A) | ≤+6 | SHORE A | ISO188 | |
| TENSILE STRENGTH | ≥12 | MPA | ||||
| ELONGATION AT BREAK | ≥400 | % | ||||
Appearance quality requirements
| No. | Item | Appearance quality requirements | |
| 1 | Bubbles, dents, impurities, obvious scars | No more than 4 dents, bubbles, magazines, obvious scars and other defects with a depth of no more than 2mm and an area of no more than 16mm2 are allowed; No more than 3 defects with depth no more than 1mm and area no more than 10mm are allowed on the design working surface. | |
| 2 | Cracking, lack of glue, spongy | Not allowed | |
| 3 | Center hole eccentricity | It is not allowed to exceed one third of the thickness of the tubular section. | |
| 4 | Thickness limit deviation | Nominal thickness of waterstop（mm） | Limit deviation |
| 4-6 | +10 | ||
| >6-10 | +1.30 | ||
| >10-20 | +20 | ||
| 5 | Width | +-3% | |
Shapes:
The ribbed with center bulb shape is the most commonly used and best sealing type of waterstop. The center bulb can adjust lateral, transverse and shear movements. A larger central bulb will accommodate greater movement.
The Dumbbell with center bulb shape of waterstop can adapt to lateral, transverse and shear movements. A larger central bulb will accommodate greater movement.
The flat rib shape of waterstop is preferred for non moving joints and provides the best sealing characteristics.
Base sealing shape of waterstop is preferred for ground joints or backfill walls.
Dumbbell shapes of waterstop are alternative contours for non moving joints.
Dumbbell shape can make the waterstop have better sealing characteristics.
Waterstop is used for construction joint and expansion joint:
Select the material of waterstop by the rules below:
When selecting the material of waterstop, you should consider the media(acid, alkali, salt, oil, solvent and various corrosive gases) that bring effects for waterstop. When it is used in acid-base environment, you should select neoprene water stop. When it is used in oil, you should better select chemigum water stop.
If there is possible to be eroded by mycete in medium, you should consider the temperature, ultraviolet light, ozone aging, oft-repeated deformation and so on. Forlow temperature conditions, EPDM water stop would be a good choice.
Select the width and thickness of waterstop considering three factors below:
1. Horizontal and vertical deformation of movement joint.
2. Water pressure.
3. Section size of structure.
Reference table about relations between water stop size and horizontal&vertical deformation of movement joint:
| Width(mm) | Thickness(mm) | Horizontal and vertical deformation of movement joint | ||||
| 10 | 20 | 30 | 40 | 50 | ||
| 200 | 6 | ● | ||||
| 250 | 6 | ○ | ● | |||
| 300 | 6 | ○ | ○ | ● | ||
| 350 | 8-10 | ○ | ○ | ● | ||
| 400 | 12 | ○ | ○ | ● | ||
| 450 | 20 | ○ | ● | |||
| 500 | 20 | ○ | ● | |||
| Noted: ●is on behalf of "suitable", ○is on behalf of "usable". | ||||||
Relationship between the size of waterstop and water pressure:
| Thickness | Width | Height of water(m) | ||||||||||
| 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | ||
| 6 | 200 | ○ | ● | |||||||||
| 6 | 250 | ○ | ○ | ● | ||||||||
| 6 | 300 | ○ | ○ | ● | ||||||||
| 8 | 350 | ○ | ○ | ● | ||||||||
| 10 | 400 | ○ | ○ | ● | ||||||||
| 12 | 450 | ○ | ○ | ● | ||||||||
| 12 | 500 | ○ | ○ | ● | ||||||||
| 16 | 500 | ○ | ○ | ● | ||||||||
| 20 | 500 | ○ | ○ | ● | ||||||||
| Noted: ●is on behalf of "suitable", ○is on behalf of "usable". | ||||||||||||
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