Evaluation of Fatigue Properties for Ultraviolet Radiation Aged Bitumen and Mixture
Bitumen is widely used in road construction. Due to heavy traffic loads and environmental factors, bitumen properties will change during service life. Bitumen will age due to diffusion of oxygen and UV radiation. Repeated loading will result in decreasing strength because of fatigue. In this paper, one layer clay powder was used to modify base bitumen with different mass contents. Then the influences of ultraviolet radiation (UV) aging on the dynamic fatigue properties of the layered clay powder were evaluated by Dynamic Shear Rheomoter (DSR) and Universal Testing Machine (UTM). The ageing evaluation shows that the ageing resistance of bitumen is improved and this improvement is more notable in bitumen fatigue than mixture.
S. P. Wu et al., "Evaluation of Fatigue Properties for Ultraviolet Radiation Aged Bitumen and Mixture", Advanced Materials Research, Vols. 217-218, pp. 181-186, 2011