ESTADO DEL ARTE DEL RECICLADO EN FRIO DE FIRMES IN SITU EN ESPAÑA THE STATE OF THE ART OF COLD IN PLACE RECYCLING OF PAVEMENTS IN SPAIN

摘要

The different reasons favouring this technique will be reported. Information like trafficcategories, material prescriptions and structural sections included in Spanishspecifications, will be provided on projects, as well as the construction process, and themain characteristics of the different works performed since the first pavement was recycledin Spain in 1991.The fatigue characterization of recycled materials with cement has been calculated. Thecorrelation between compressive strength at 7 day intervals, which is the usual controlparameter at the worksite, and long-term flexural strength has been obtained. All in orderto optimize the structural design of pavements, and to propose a catalogue of structuralsections with cement-recycled layers. The cold in-place recycling with emulsion, it is atechnology that it has been evolving with the experience obtained in Spain. Most recentinnovations are based in the use of the mix emulsion plus cement as binder.With a total surface of more than 35 million square metres already recycled in Spain, it canbe said that in-place pavement recycling with cement or/and with emulsion are proventechniques, with a wide range of experience and good knowledge of the constructingprocess in Spain, and which performance to date has been very good.