1. School of Materials Science and Engineering, Chang'an Univ., Xi'an, 710061 CN
2. Associate Professor, Engineering Research Central of Pavement Materials, Ministry of Education of P. R. C., Chang'an Univ., Xi'an, 710061 CN (Corrseponding author) e-mail: wangzhenjun029@163.com
3. Engineering Research Central of Pavement Materials, Ministry of Education of P. R. C., Chang'an Univ., Xi’an, 710061 CN