TY - GEN
T1 - Ageing effect on the relaxation properties of bitumen
AU - Jing, R.
AU - Varveri, A.
AU - Liu, X.
AU - Scarpas, A.
AU - Erkens, S.
N1 - Funding Information:
The authors gratefully acknowledge the Dutch Ministry of Transport, Public Works and Water Management for funding this project.
Publisher Copyright:
© 2018 Taylor & Francis Group, London.
PY - 2018
Y1 - 2018
N2 - The ageing of bitumen has a significant impact on the mechanical behavior of asphalt concrete. In this study, Dynamic Shear Rheometer (DSR) tests were utilized to investigate the effect of ageing on the relaxation properties of bituminous materials. PEN 70/100 bitumen films with thickness of 2 mm were exposed to laboratory ageing at various conditions. Specifically, different combinations of ageing time, temperature and pressure were applied on the bitumen films. Three evaluation indices, explicitly the shear stress at 0 s and 100 s, the ratio of shear stress at 0 s and 100 s and the time that shear stress reduce to 50% and 25% of the initial, were used to determine the evolution of the relaxation properties of bitumen. The results show that, in comparison to fresh bitumen, aged samples show higher residual shear stresses after relaxation and are more susceptible to stress accumulation thus cracking. In addition, temperature, followed by pressure and ageing time, was found to have the strong impact on bitumen ageing.
AB - The ageing of bitumen has a significant impact on the mechanical behavior of asphalt concrete. In this study, Dynamic Shear Rheometer (DSR) tests were utilized to investigate the effect of ageing on the relaxation properties of bituminous materials. PEN 70/100 bitumen films with thickness of 2 mm were exposed to laboratory ageing at various conditions. Specifically, different combinations of ageing time, temperature and pressure were applied on the bitumen films. Three evaluation indices, explicitly the shear stress at 0 s and 100 s, the ratio of shear stress at 0 s and 100 s and the time that shear stress reduce to 50% and 25% of the initial, were used to determine the evolution of the relaxation properties of bitumen. The results show that, in comparison to fresh bitumen, aged samples show higher residual shear stresses after relaxation and are more susceptible to stress accumulation thus cracking. In addition, temperature, followed by pressure and ageing time, was found to have the strong impact on bitumen ageing.
UR - http://www.scopus.com/inward/record.url?scp=85061235635&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85061235635
SN - 9781138313095
T3 - Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018
SP - 421
EP - 424
BT - Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018
A2 - Masad, Eyad
A2 - Menapace, Ilaria
A2 - Bhasin, Amit
A2 - Scarpas, Tom
A2 - Kumar, Anupam
T2 - International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018
Y2 - 16 April 2018 through 18 April 2018
ER -