Tielin Han, Xianfeng Wang, Dawang Li, Ningxu Han, Dongfeng Li and Feng Xing Guangdong Key Laboratory of Durability in Coastal Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen, Guangdong 518060, P.R. ChinaSchool of Civil Engineering and Architecture, Xian University of Technology, Shaanxi Xi’an 710048, P.R. China.School of Science, Harbin Institute of Technology (Shenzhen), The University Town of Shenzhen, Nanshan, Shenzhen, P.R. China