The four founding countries – Austria, Croatia, Czech Republic and Hungary – decided in 2004 to collaborate more closely and to launch as their first joint project the Central European Congresses on Concrete Engineering (CCC Congresses) as a forum for an annual cross-border exchange of experience among principals, authorities, contractors, design engineers and academics in the field of construction materials and technology, concrete structures and civil engineering, as well as applied research and development.

The 1st CCC Congress in Graz (Austria) 2005 was devoted to the Fibre Reinforced Concrete in Practice; the 2nd Congress in Hradec Kralove (Czech Republic) 2006 had the main topic Concrete Structures for Traffic Network; the 3rd Congress in Visegrád (Hungary) 2007 focused on Innovative Materials and Technologies for Concrete Structures. The 4th Congress in Opatija (Croatia) will deal with Concrete Engineering in Urban Development. The preparation for 5CCC in 2009 in Baden, Austria is already under way.