1. Professor, Dept. of Civil Engineering, Dalian Univ. of Technology, 116024 Dalian, China.
2. Researcher, Institute of Construction Materials, Univ. of Stuttgart, Pfaffenwaldring 4, D-70550 Stuttgart, Germany.
3. Director, Institute of Construction Materials, Univ. of Stuttgart, Pfaffenwaldring 4, D-70550 Stuttgart, Germany.
4. Senoir Researcher, Institute of Construction Materials, Univ. of Stuttgart, Pfaffenwaldring 4, D-70550 Stuttgart, Germany.