Bridge Bearings & Neoprene Bearing Pads Engineering Guide

Elastomeric bridge bearings, commonly referred to as Neoprene Bridge Bearing Pads, are essential structural supports positioned between bridge superstructures and concrete piers. Zisan Construction manufactures and imports premium steel-reinforced elastomeric bearing pads complying with AASHTO M251, BS 5400, and EN 1337 standards.

Internal Structure & Vulcanization

A Neoprene Bridge Bearing Pad supplied by Zisan Construction consists of a monolithic sandwich matrix of 100% virgin chloroprene rubber bonded under extreme hydraulic pressure and heat with internal structural steel plates (Q235 / Q355).

Key Mechanical Functions

• Vertical Load Absorption: Compresses uniformly under heavy vehicular loads (10 to 15 MPa compressive strength).
• Rotational Flexibility: Accommodates longitudinal and transverse rotation of bridge girders due to deflection.
• Shear Movement: Permits horizontal thermal expansion and contraction without generating damaging stresses in concrete piers.

BUET Testing & Quality Control

All elastomeric bridge bearings supplied by Zisan Construction are quality tested at the BUET materials testing laboratory to verify shear modulus, compression set, durometer hardness (60 ± 5 Shore A), and ozone resistance.