This report is prepared for Defence Estates (DE) of the Ministry of Defence (MoD) under contract number WS21/4013: 'Provision of research and consultancy services'. TRL Limited (formerly the Transport Research Laboratory) were commissioned by DE to prepare guidelines for crack and seat maintenance of pavements at DE airfields and thus disseminate the knowledge that has been gained through full-scale trials that have taken place at RAF Coningsby and RAF Lyneham. The overall purpose of the guide is to provide enough information to enable those engineers not familiar with crack and seat technology to specify and use the technique effectively for the maintenance of unreinforced concrete pavements and flexible composite pavements at airfields. A background is provided which includes a description of the mechanisms that result in the occurrence of reflection cracking and options for maintenance. The crack and seat methodology and procedures are detailed and a specification and notes for guidance are given for the use of crack and seat on airfield pavements. Detailed guidance is given to help DE project managers supervise and check the works on site. (Author/publisher)
Samenvatting