1. Institute of Physics of Materials Academy of Science of the Czech Republic, Žižkova 22 616 62 Brno Czech Republic
2. Brno University of Technology Faculty of Civil Engineering, Veveří 331/95 602 00 Brno Czech Republic
3. Department of Civil and Materials EngineeringUniversity of Malaga C/Dr Ortiz Ramos s/n, 29071 Malaga Spain