1. Jiangsu Key Laboratory of Construction Materials, School of Materials Science & Engineering, Southeast University, Nanjing 211189, China
2. Institute of Soft Matter Mechanics, College of Mechanics and Materials, Hohai University, Nanjing 211100, China
3. Jiangsu Engineering Research Center of Concrete Cracking, College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China