TITLE:
Analysis of the Rheological Behavior of Aging Bitumen and Predicting the Risk of Permanent Deformation of Asphalt
AUTHORS:
Samia Saoula, Khedoudja Soudani, Smail Haddadi, Maria Eugenia Munoz, Antxon Santamaria
KEYWORDS:
Aging; Bitumen; Rheology; Deformation; Rutting
JOURNAL NAME:
Materials Sciences and Applications,
Vol.4 No.5,
May
21,
2013
ABSTRACT:
The aging of bitumen has a significant impact on the mechanical behavior of asphalt. This aging is carried out at the mixing operation with the aggregates generally at 163°C in the case of pure mixtures or at temperatures higher than in the case of the modification by polymers or industrial waste. This paper presents experimental results of a study of the rheological behavior of a class of bitumen 40/50 to the artificial aging. Three aging temperatures were selected: 163°C, 173°C and 183°C. From obtained results, a study of the risk of deformation of asphalt is performed, based on the results of correlation between the behavior of the coated and his binder deducted SHRP specifications and technical advice French. These results show that the stiffness of the aged binders increases with aging temperature. Moreover, there is no risk of rutting and fatigue cracking for thermal coated projected.