Retread in-situ recycling
Carriageway Retread
The existing surface is down-milled to a depth of up to 75mm with intermittent rolling to allow the passage of traffic. Where necessary, improvements to the material grading can be improved by the addition of aggregate. The surface is then harrowed and graded to form the new road profile.
Carriageway Retread Emulsion is applied followed by further harrowing to ensure maximum distribution and penetration of the emulsion. After rolling, a second application of binder is followed by 14mm chippings to close surface voids. The last stage in the process is a coat of emulsion and 6mm chippings.
To prolong the life of the reconstruction, a surface treatment or overlay is advisable the following season.
Footway Retread
The existing footway is scarified to a depth of between 50 and 75mm with a mini cold planer. Unsuitable material and items in excess of 75mm are removed. If required, isolated soft spots are replaced with graded limestone or similar. Scarified material is shaped and graded by hand and any excess material removed to allow for a 20mm wearing course.
Colas Retread 'C' Bitumen Emulsion is applied by bulk sprayer and the surface consolidated by roller. Limestone aggregate is applied lightly to the surface of the completed footway, which is then rolled again. Tack coat is applied before surfacing with 20mm of specified footpath wearing course to complete the process.