Principle
Doshin rubber bridge expansion joints comprise steel angles and steel bridging plate system encased in a flexible elastomer. Bridge expansion joint is capable of sustaining loads and movements up to 330 mm without damaging the surface or supporting structure during its working life. It has good riding quality and skid resistance that is not hazardous to all road users.
Advantages
Extended durability
Encased in corrosive resistant elastomer
Water tightness
Smooth wear resistant surfacing
Elastometric Expansion Device Specifications
The Neoprene or NR compound for this expansion device shall be in accordance with ASTM D2000 Specification:
Requirements | Physical Properties |
60 + 5 | Hardness - Shore A |
1500 psi | Tensile Strength |
325 % min. | Ultimate Elongation |
35 % max. | Compression Set 22hrs @ 100° C |
No Cracks | Ozone Resistance 25pphm / 20 % strain / 96 hrs / 40° C |
120 % max. | ASTM oil # 3 for 70 hrs @ 100° C |
Heat Resistance : 70hrs @ 100° C | |
+15 | Change in Hardness |
-15% | Change in Tensile Strength |
-40% | Change in Elongation |