Pavement joint heater avoids early joint deterioration

As part of our highway maintenance work we undertake over 100,000 tonnes of resurfacing every year on Yorkshire & Humber’s motorways and trunk roads. Design solutions as part of this work that minimise risk of future failure or early deterioration of the surface can have a major impact on the 5 million people and 270,000 businesses that use these roads every day (our Community).

Early failure of the joint between lanes where the white lining is laid and road studs are installed is a common problem, as often we have new material being laid against existing cold material. We investigated how to make this joint better.

We used a new piece of machinery, a joint heater, fixed to the side of the paver. Controlled heat is pulsed through the joint heater into the joint as the paver progresses down the carriageway. This heats the material in front of the screed and allows the new material to be laid against warmed material giving a homogeneous joint between lanes with old and new aggregate interlocked.

The surface then undergoes compaction with reduced aggregate crushing and ensuring long term integrity of the joint, and thereby retention of the white lining.

In addition, the need for spraying the joint ahead of the paver is eliminated.

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Entry submitted by A-one+ Integrated Highway Services

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