Asphaltic Plug Expansion Joints

Our asphaltic plug bridge expansion joint is designed for movement capability up to +/- 25mm and provides a flexible and watertight seal for bridge decks whilst maintaining the ability to withstand heavy traffic loadings without rutting. 

• UK highways approved
• Polymer modified bitumen binder blended with single sized aggregate
• Installed by our own crews
• Watertight seal prevents ingress of water and salts
• Quick to install during overnight lane closures to minimise disruption
• Smooth riding surface
• Topping replacement service available when resurfacing
• Can be installed in part widths, minimising disruption to one lane at a time

A combination of an elastomer modified bitumen binder and carefully selected single sized aggregate, the joint is constructed in layers, in-situ. The binder contains a special blend of bitumen, polymers and a surface active agent. These are specifically formulated to combine:

  • Good fluidity at process temperatures

  • Low temperature flexibility

  • Ambient temperature flow resistance

The joint develops a very strong bond to the concrete and to the vertical faces of the adjacent asphalt. The binder is heated on site in a special boiler and the joint is installed by our fully trained and competent crews in accordance with the installation method statement.

The horizontal movement capacity (+/- 25mm) of the joint is key to providing a watertight seal which prevents the ingress of water and de-icing salts to the bridge deck structure, thereby playing its part in protecting the bridge. The versatility of an APJ makes it the ideal bridge joint for use across the full width of the structure including carriageway, verge, kerbs, footways and/or hard shoulders.

Our APJ’s are available in standard grade or motorway grade (for improved performance in heavy traffic environments). They can be installed full depth or can re-top an existing joint which has been planed off as part of a resurfacing project.

• Quick installation: less disruption.
• Watertight seal: protects the bridge deck.
• Flexible: accommodates both horizontal and vertical movement.
• Level finish: for a smooth transition between joint and surface course.
• Easy to repair.
• Optional pressure relief/drainage systems.
• Can be installed in part widths, minimising disruption to one lane at a time.
• Can be planed through when resurfacing with subsequent re-topping repairs to just those top layers affected.
• Versatile for use across the full width of the bridge including verges, kerbs and hard shoulders.
• Overnight works ensure disruption free travel the following day.
• Surface dressed to enhance skid resistance.
• Large volume outputs capable by assigning multiple crews to a contract

Bridge joint excavated: shows kerb through the excavation

Drainage channels can be incorporated into your bridge joint to relieve water pressure. See some examples in the gallery below.

Bridge Joint Construction Gallery