TY - JOUR
T1 - Investigation on the low temperature properties of asphalt binder
T2 - Glass transition temperature and modulus shift factor
AU - Wang, Di
AU - Cannone Falchetto, Augusto
AU - Riccardi, Chiara
AU - Wistuba, Michael P.
N1 - Funding Information:
The RILEM Technical Committee on Chemo-Mechanical Characterization of Bituminous Materials (CMB) 252 is gratefully acknowledged. The authors would also like to thank the China Scholarship Council, National Natural Science Foundation of China (51508064, 51408083) for the financial support to the graduate studies of the first author. Augusto Cannone Falchetto would like to acknowledge the support of the Japan Society for Promotion of Science – JSPS international research in Japan program.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/6/10
Y1 - 2020/6/10
N2 - This paper investigates the effect of the glass transition temperature, Tg, and the use of modulus shift factors bT on the measured rheological properties of asphalt binders at low temperatures. First, temperature-frequency (T-f) sweep tests are performed with the Dynamic Shear Rheometer (DSR) on asphalt binder, and, the corresponding Tg is calculated. Next, modulus shift factors bT is applied to the modulus data measured at temperatures below Tg in the Cole-Cole plot. Finally, a visual comparison of master curves and the parameter assessment of 2 Spring 2 Parabolic 1 Dashpot (2S2P1D) model are used to evaluate the effect of bT. A significant increase in dynamic shear modulus is observed when the DSR test is performed below Tg, while bT can take into account this phenomenon on the shape of the curves in the Cole-Cole plot. Hence, the combined use of the horizontal shift factor, aT, and modulus shift factor, bT, is recommended when the DSR tests are performed at temperatures lower than the corresponding asphalt binders Tg.
AB - This paper investigates the effect of the glass transition temperature, Tg, and the use of modulus shift factors bT on the measured rheological properties of asphalt binders at low temperatures. First, temperature-frequency (T-f) sweep tests are performed with the Dynamic Shear Rheometer (DSR) on asphalt binder, and, the corresponding Tg is calculated. Next, modulus shift factors bT is applied to the modulus data measured at temperatures below Tg in the Cole-Cole plot. Finally, a visual comparison of master curves and the parameter assessment of 2 Spring 2 Parabolic 1 Dashpot (2S2P1D) model are used to evaluate the effect of bT. A significant increase in dynamic shear modulus is observed when the DSR test is performed below Tg, while bT can take into account this phenomenon on the shape of the curves in the Cole-Cole plot. Hence, the combined use of the horizontal shift factor, aT, and modulus shift factor, bT, is recommended when the DSR tests are performed at temperatures lower than the corresponding asphalt binders Tg.
KW - Asphalt binder
KW - Dynamic Shear Rheometer (DSR)
KW - Glass transition
KW - Low temperature property
KW - Modulus shift factor
KW - Rheological modeling
UR - http://www.scopus.com/inward/record.url?scp=85079834582&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.118351
DO - 10.1016/j.conbuildmat.2020.118351
M3 - Article
AN - SCOPUS:85079834582
VL - 245
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 118351
ER -