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Laminated Bearings

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Neoprene Bearing Pads,neoprene bridge bearings, laminated elastomeric bearings,seismic isolators etc are generally known as bridge bearing pads in Construction industry. We manufacture them in our purpose built plant using high-grade virgin Neoprene - Polychloroprene Grade- 2 elastomer- mixed with carbon black and rubber chemicals to form into a rubber compound to match AASHTO M 251 Specification under controlled heat and pressure.In house Quick Production Test of all bearings shall be done at Clients/Representative presence. Tests confirming to AASHTO specification in accordance with Acceptance Testing on either Level I or Level II or Short/Long-Duration Compression Test up to 4200 kN with horizontal shear up to 400kN can be carried out in our facility.

Neoprene bridge bearings - plain or laminated - elastomeric bearings are much easier to install in a bridge than compared to other types of bearing used and require nil maintenance. Unlike most other elastomer, Neoprene rubber under-goes no marked stiffening at low temperature when the thermal contraction of the bridge deck is at maximum. Such stiffening could be deleterious to bearing and / or structure. Correctly-designed and suitably-compounded laminated Neoprene Rubber bridge bearings can be confidently expected to function efficiently for at least a decade.

Advantages of Neoprene Elastomeric bearings.

As efficient bearing plates for pre-cast, pre-stressed concrete or steel beams in bridges and buildings, Neoprene Pads - plain and laminated - manufactured by us permits a smooth and uniform transfer of load from the beam to the substructure and allow beam rotation at the bearing due to deflect ion of the beam under load. They further allow lateral and longitudinal movement of the beam caused by thermal forces. Neoprene Pads have no movable parts and thermal expansion and contraction are absorbed by the pad's ability to give and take in shear. There is no sliding motion between pad and beam or between pad and abutment.

Neoprene bridge bearing specifications.

The material specifications for the elastomeric bearing shall meet all the current requirements of AASHTOM M 251.Bearing pads and elastomeric bearings will comply with Articles 18.2.3 through 18.2.6 of Section 18, Bearing Devices, Division II, Construction, of the AASHTO Standard Specifications for Highway Bridges.

Bearing pads and laminated bearings shall be of the compound known as neoprene and shall be cast in molds under pressure and heat. A plain elastomeric bearing pad and steel load distribution plate combination shall be classified as a laminated elastomeric bearing. Test specimens shall be in accordance with ASTM D 3182 or D 3183. Where test specimens are cut from the finished product, a 20 percent variation from the original physical properties is allowed.