Product Details

Lead Core Rubber Isolation Bearing for Highway and Bridge

Brand Name NO
Place of Origin China
Model Number BB-004

Product Features


Lead Core Rubber Isolation Bearing for Highway and Bridge
Introduction.

Lead Core Rubber Isolation Bearing for Highway and Bridge are rubber bearings made up of alternate layers of steel laminates and hot vulcanized rubber with a cilindrical central lead core. The rubber in the bearing acts as a spring. It is very soft laterally but very stiff vertically. The high vertical stiffness is achieved by having thin layers of rubber reinforced by steel shims. The lead core provides damping by deforming plastically when the isolator moves laterally in an earthquake.  

Applications.
Lead Core Rubber Isolation Bearing for Highway and Bridge were installed under the girders of the isolated bridges. The bearings are supplied with guide bars that impede transverse movement. Lead-rubber bearings were chosen for the seismic isolation of these bridges. This type of bearing provides a good balance between damping and cost. Since all components are vulcanized inside the rubber, no special maintenance is required beyond that of laminated bearings.

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Lead Core Rubber Isolation Bearing for Highway and Bridge

Features.
High quality rubber materials

Chloroprene (neoprene), natural rubber 
or EPDM as elastomeric material.

Strong steel reinforced plates

Steel platesunder strict ISO 9001:2008 accredited quality control standards.

High purity lead core

The lead core is high purity and does not contain any impurities.

Technical performance.
Items
Index
Material
CR
NR
EPDM
Tensile Strength MPa (kgf/cm2)
17.0
18.0
15.0
Hardness (shore A)
60±5
60±5
60±5
Elongation at break %
400
450
350
Tensile set at break %
≤25
≤25
≤25
Compression set %
15
30
25
Tensile bond strength between rubber & steel plate MPa (kgf/cm2)
≥3.0
≥3.0
≥3.0
Brittleness temperature ℃
≤-40
≤-55
≤-60
Constant compression deformation%(70℃×22h)
≤25
≤25
≤25
Air Aging
Testing Conditions ℃×h
100×72
70×168
100×70
variation in hardness (shore A)
0-10
0-10
0-10
Tensile Strength change rate (Mpa)
≥-10
≥-15
≥-10
Elongation at break change rate %
≥-30
≥-20
≥-20
Ozone Aging IPPM30℃×100h
No crack
Bending fatigue
No crack after bending 6×10 times
Item
Index
Ultimate compression strength Rd /MPa
≥60
Compression modulus of elasticity E1/ MPa
E±E×20%E
Shear modulus of elasticity G1 / MPa
G±G×15%G
Allows maximum shear deformation tg α
≤0.7
shear deformation produced by fast loading tg α
≤0.25
Anti-sliding friction coefficient
Against steel
0.2
Against concrete
0.3


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Lead Core Rubber Isolation Bearing for Highway and Bridge

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Lead Core Rubber Isolation Bearing for Highway and Bridge

Packing & Delivery

Packing Details: Platic film and pallets.
Delivery Details: 10-30 days after deposite.

Company and Clients

Hongrui Boya (belongs to Shuanglin Group) professionally supplys Road, bridge and building support, expansion joint, waterproof materials. 
It has one factory, three companies for domestic and foreign markets. 50 workers, 8 enginnerings, and over 20years experience of manufacture.
Main products are Bridge bearings, bridge expansion joint, concrete waterstop products, rubber air bag, polysulfide sealant etc.
ISO certification, CE standard, AASHTO, and SGS test, with a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in infraconstruction and other industries.

Factory
Workshop


Warehouse


Team


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Lead Core Rubber Isolation Bearing for Highway and Bridge

Our Service
Production and processing
Quality and Performance Testing
Delivery of goods
Our Certifications
Related Products
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Spherical PTFE Bridge Bearing

Spherical rubber bridge bearing is more suitable for wide bridge and curved bridge.

Elastomeric Rubber Bearing Pads

Elastomeric Rubber Bearing Pads are more suitable for small and medium road Bridges.

FAQ
Q: Are you trading company or manufacturer ?

A: We are factory.

Q: How long is your delivery time?

A: Generally it is 3-5 days if the goods are in stock. or it is 7-20 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=3000USD, 100% in advance. Payment>=3000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us as below:


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