Recycling road material in situ

In our designs for maintenance work on the motorway and trunk road network, we are always looking at solutions to reduce the impact of our work and improve the image of construction.

In the summer of 2017, we carried out major resurfacing of the A64 near York. Part of the pavement solution design included the specification of ‘repave’, a hot insitu recycling process that re-invigorates existing material without removing it from site.

This method involved planing off the top 30mm of worn surface course and then heating the next 30mm and recycling it insitu in the road before applying a new 30mm surface course on top.

With residual heat from the repaved layer, this then creates a 60mm homogeneous layer which is more resistant to earlier life failure, helps prevent delamination between layers, and only uses half the material. This method replaced the traditional 60mm plane out and replace with 60mm new material.

On this project we repaved 1,100m3 of existing pavement material insitu. This meant 1,100m3 less material to be removed from site, and 1,100m3 less new raw material needing to be imported to site . This saved 132 lorry trips from the supply plant to site saving nearly 8,000 miles of roadtrips by trucks.

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Entry submitted by A-one+ Integrated Highway Services


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