Elastomer rubber pad bridge bearing

Elastomer rubber pad bridge bearing
Elastomeric bearing pads use NR (Natural Rubber) or CR (Chloroprene Rubber). The minimum thickness of a sheet, in accordance with EN 1337-3, may in no circumstance be under 5 mm, or over 25 mm.
Shuanglin Elastomeric bearing pads are designed for use in Bridges and other structures such as Buildings as a vertical load bearing component. They are manufactured from high quality materials with number of layers of steel plates depending on the type of bearings highly strong and extremely resistance to weathering, ageing with almost no influence from UV radiation and Ozone.  Sheets of high strength steel are capsulated by Elastomer either NR or CR type.

Characteristics Requirements
CR NR EPDM
Hardness 60±5 60±5 60±5
Tensile strength / MPa 17.0 18.0 15.0
Elongation at break / % 400 450 350
Brittle temperature ℃ -40 -50 -60
Compression set % 15 30 25
Ozone resistance
Elongation: 20%

Temperature: 40℃

100x10 -8
25x10 -8

100x10 -8
No crack No crack No crack
Accelerated aging Condition
℃ x h 100x70 70x168 100x70
Elongation Strength
change rate % ≤ 15 15 15
Tensile Strength
change rate % ≤ 40 20 40
Hardness change 0-10 -5-10 0-10
Bond strength of elastomer and steel 10 10 10
Bond strength of elastomer and PTFE 7 7 7

Performance requirements of Complete bearings

Item Index
Ultimate compression strength Rd /MPa ≥70
Compression modulus of elasticity E1/ MPa E±Ex30%
Shear modulus of elasticity G1 / MPa G±Gx15%
Shear modulus of elasticity after aging G2 / MPa G1±G1x15%

Tangent angle tan A Concrete bridge ≥1/300
Steel bridge ≥1/500
Friction coefficient for elastomer and steel μ with silicone grease ≤0.03


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