Repave in-situ recycling
Repave - hot in situ recycling of carriageways to 50mm
A pavement, although sound, can sometimes show signs of deformation or surface fretting. In such a situation, Repave provides a faster, more cost effective alternative to traditional forms of surfacing. The process allows flexibility of programming - the heat from Repave penetrates deep into the road material allowing work to take place at virtually any time of year. The existing road surface is heated to 150º C and scarified to a depth of 30mm using a two-stage scarifier with spring loaded tines to avoid damage to street furniture. Next an oscillating, floating screed reprofiles and corrects levels for the required crown or crossfall. The process is completed by the immediate application of either a 25mm bituminous wearing course, hot rolled asphalt with 20mm pre-coated chippings, high stone content asphalt or a proprietary thin surfacing.
The process is suitable for any class of road. Material is recycled in-situ, cutting lorry movements, considerably reducing the use of new aggregates and minimising waste material.
The heat from the Repave machine welds the new materials removing the need for a tack coat. Repave can be combined with Colrug thin surfacing to aid tyre noise reduction, improve grip and reduce spray in wet weather. This process was used in HA Area 8 on the A421 near Bedford in early 2006. Snow, rain and temperatures down to -5C only extended the 15 night programme by one night. Repave complies with Department of Transport Specification for Highway Works Clause 926.