1. Politecnico di Milano
2. Dept. of Civil and Environmental Engineering, Politecnico di Milano, 20133 Milano, Italy
3. CSIC - Eduardo Torroja Institute for Construction Science, 28033 Madrid, Spain
4. Dept. of Inorganic Chemistry and Chemical Engineering, University of Cordoba, 14071, Cordoba, Spain
5. Magnel Laboratory for Concrete Research, Faculty of Engineering and Architecture, Ghent University, 9000 Ghent, Belgium