The relationships between asphalt ageing in lab and field based on the neural network

The lab ageing tests of AH-90 asphalt (the 25°C penetration is about 80–100, 0.1 mm) have been done by the rotating thin film oven test and the ordinary convection oven under 163°C from 5 to 120 h, and the macro-performance has been measured such as the penetration under 15°C, 25°C, 30°C and the ductility under 10°C. Based on the back propagation neural network by MATLAB, the paper has trained the data of the asphalt penetration (25°C) in the different service time of the asphalt pavement from the different zones in China, and predicted the 25°C penetration of the asphalt pavement ageing in the field at the different service time in cold zone. On the basis of it, the paper has established the relationships between the asphalt ageing simulated in the lab and the ageing in the field. The research conclusions have been put forward and suggested to apply in the recycled asphalt pavement.