1. Lect., State Key Lab. of Concrete Mat. Res., Tongji Univ., Shanghai 200092, PRC; temporarily, visiting scholar, Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. E-mail: zhangdng@ust.hk
2. Dir. and Prof., State Key Lab. of Concrete Mat. Res., Tongji Univ., Shanghai, PRC. E-mail: wukeruk@online.sh.cn