1. Magnel Laboratory for Concrete Research; Department of Structural Engineering; Faculty of Engineering and Architecture; Ghent University; Tech Lane Ghent Science Park, Campus A Technologiepark Zwijnaarde 904 B-9052 Ghent Belgium
2. Center for Building Materials; Chair of Non-Destructive Testing; Technical University of Munich; Baumbachstrasse 7 D-81245 Munich Germany
3. PProGRess-UGCT; Department of Geology; Faculty of Sciences; Ghent University; Campus Sterre, Krijgslaan 281, Building S8 B-9000 Ghent Belgium