Description

Asphalt expansion joint is composed of a blend of asphalts, vegetable fibers, and mineral fillers formed under heat and pressure between two asphalt-saturated liners. It is waterproof, permanent, flexible, and self-sealing. It can fully absorb the bridge deck's vibration shock which come from vehicular traffic,and is effective in reducing the bridge cracks,so that make it comfortable and smooth when vehicles cross.Ensure construction quality through control the Process of construction technology on expansion joints.

Feature

L Movement range of up to 20mm

L Silent under traffic

L Rapid installation, Easy Repair or Replacement

L Bonded to the structure; no drilling or mechanical fixings

L Non-absorbing.

L Used in 80% of all control joint situations.

L Protects against water infiltration.

L Self-sealing.

L Permanent.

Installation

1. Remove the asphalt surfacing to the desired width by saw cutting and jack hammering. the asphalt should be completely removed to expose the deck.

A clean join to the asphalt is essential. Any waterproofing membrane should be removed.

2. Clean out the recess and the expansion gap and prepare

3. Seal the joint and improve adhesion of the joint to the asphalt.

4. Install the aluminium strip or steel plate over the gap.

5. Pour stone heated to 150C - 190C into the joint to a maximum depth of 40mm, but not less than 20mm. the layer should then be flooded with binder heated to the correct temperature. this process should be repeated until the joint is within 25mm 5mm of the surface.

6. Apply Asphalt expansion joint

7. Compact using a compactor or vibrating roller.

8. Seal the surface.