Effective Temperature of Rutting for Semi-Rigid Base Asphalt Pavement

Abstract:

This paper aims to predict the rutting depth more accurately and simplify the prediction process. First， the effective temperature for rutting of semi-rigid base asphalt pavement in 10 sites was calculated based on the full-thickness asphalt pavement temperature field prediction model and rutting prediction model. Then， the effect of asphalt layer thickness and site factors on the effective temperature were analyzed. Afterwards， a prediction model was established， incorporating the depth， annual average temperature （AAT）， and annual rainfall （AR）. Finally， the model was verified and compared with other existing models. The results show that the asphalt layer thickness only has a significant effect at a depth of 0.5 cm， and the site significantly affects each sublayer. A model with a better extensibility and robustness is proposed based on the distribution characteristics of effective temperature along the depth. Combined with the regional correction factor， an effective temperature prediction model considering regional differences is established. Compared with the existing models， the effective temperature model established in this paper is suitable for different design conditions， materials， and traffic volumes.

Key words:road engineering;asphalt pavement;effective temperature for rutting;prediction model