Analisi teorica del comportamento termico in regime transitorio delle pavimentazioni flessibili al variare delle condizioni climatiche

Analysis of the influence of temperature on the mechanical and rheological properties of the mixtures used in the bituminous layers of flexible pavements is very important for the choice of materials and correct design of these structures. For this reason, a model has been studied in order to quantify the variation of temperature in bituminous concrete road and airfield pavements, in relation to the climatic conditions. The model developed gives, in any site, the temperature profile in the pavement at depth at any hour of the day or day of the year. After calibrating the model on the basis of data available in the literature, a field investigation has been carried out. In an airfield pavement in north-eastern Italy (Treviso), thermocouple devices were inserted at various depths and the thermal state monitored in the bituminous layers. The model appears to be reliable for the preventive characterisation of the thermal condition of flexible pavements.