TY - JOUR
T1 - Low-temperature thermal cracking of asphalt binders as ranked by strength and fracture properties
AU - Anderson, David A.
AU - Lapalu, Laurence
AU - Marasteanu, Mihai O.
AU - Le Hir, Yann M.
AU - Planche, Jean Pascal
AU - Martin, Didier
PY - 2001
Y1 - 2001
N2 - The original Superpave low-temperature specification for asphalt binders placed limits on the low-temperature stiffness and m-value. A recently approved alternative to the original Superpave asphalt binder low-temperature specification makes use of the measured stiffness and tensile strength of the binder to determine a critical cracking temperature. Thermal cracking temperatures are presented for 42 plain and modified asphalt binders. Thermal cracking temperatures determined by the original and recently approved alternative Superpave specification are compared. The fracture toughness, KIC, can also be used to evaluate low-temperature cracking properties of asphalt binders. Fracture properties obtained for 14 asphalt binders are compared with the thermal cracking temperatures determined by the original and recently adopted alternative Superpave specifications. The set of 14 binders was produced from a common base material but modified by different means. For the set of 14 binders, there is little difference in their ranking according to both the original and recently proposed alternative Superpave low-temperature criteria; however, their ranking is quite different on the basis of the fracture properties as measured by KIC KIC appears to provide a much more discriminating ranking of the binders than either of the Superpave specification criteria.
AB - The original Superpave low-temperature specification for asphalt binders placed limits on the low-temperature stiffness and m-value. A recently approved alternative to the original Superpave asphalt binder low-temperature specification makes use of the measured stiffness and tensile strength of the binder to determine a critical cracking temperature. Thermal cracking temperatures are presented for 42 plain and modified asphalt binders. Thermal cracking temperatures determined by the original and recently approved alternative Superpave specification are compared. The fracture toughness, KIC, can also be used to evaluate low-temperature cracking properties of asphalt binders. Fracture properties obtained for 14 asphalt binders are compared with the thermal cracking temperatures determined by the original and recently adopted alternative Superpave specifications. The set of 14 binders was produced from a common base material but modified by different means. For the set of 14 binders, there is little difference in their ranking according to both the original and recently proposed alternative Superpave low-temperature criteria; however, their ranking is quite different on the basis of the fracture properties as measured by KIC KIC appears to provide a much more discriminating ranking of the binders than either of the Superpave specification criteria.
UR - http://www.scopus.com/inward/record.url?scp=0035715332&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035715332&partnerID=8YFLogxK
U2 - 10.3141/1766-01
DO - 10.3141/1766-01
M3 - Article
AN - SCOPUS:0035715332
SN - 0361-1981
SP - 1
EP - 6
JO - Transportation Research Record
JF - Transportation Research Record
IS - 1766
ER -