1. Mobile Station of Traffic and Transportation Engineering, Chang’an University, Middle-section of Nan’er Huan Rd., Xi’an 710064, People’s Republic of China (Corresponding author), e-mail: chenz@xauat.edu.cn, http://orcid.org/0000-0003-3464-8932
2. College of Materials Science and Engineering, Xi’an University of Architecture & Technology, No. 13 Yanta Rd., Xi’an, Shaanxi 710055, People’s Republic of China, http://orcid.org/0000-0002-3337-184X (R.L.)
3. Key Laboratory for Highway Engineering in Special Region of Ministry of Education, College of Continuing Education, Chang’an University, Middle-section of Nan’er Huan Rd., Xi’an 710064, People’s Republic of China
4. Xi’an Changqing Technology & Engineering Co., Ltd., No. 151 Weiyang Rd., Weiyang District, Xi’an 710000, People’s Republic of China