Based on the data of the asphalt aging simulated in lab,through the data collection of the asphalt aging in the field,the BP neural network system was established by MATLAB to train the data of the asphalt 25 ℃ penetration in the different using time asphalt pavement from different regions in China,and predicted the 25 ℃ penetration of the different using time asphalt pavement aging in the field in cold zone.The theoretical method for the relationships between asphalt aging simulated in lab and aging in field has been put forward.
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