1. Road Engineering Laboratory, Suzhou Univ. of Science and Technology, Suzhou, China; State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan 430070, China (corresponding author).
2. Asphalt Rubber Technology Service, Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634-0911.
3. State Key Laboratory of Silicate Materials for Architectures, Wuhan Univ. of Technology, Wuhan 430070, China.
4. Stiftelsen SINTEF, Box 4760 Sluppen, N-7465 Trondheim, Norway.