1. Karlsruhe Institute of Technology (KIT), MPA Karlsruhe, Gotthard-Franz-Str. 3, 76131 Karlsruhe, Germany.
2. Institute of Concrete Structures and Buildings Materials, Karlsruhe Institute of Technology (KIT), MPA Karlsruhe, Gotthard-Franz-Str. 3, 76131 Karlsruhe, Germany.