Correct specification of the concrete in the specifications and when ordering is essential in order to avoid many discussions after installation. The specification of concrete must be based on European standard NBN EN 206 and its Belgian supplement, standard NBN B 15-001, but it is not always easy to find your way around.This application offers you an easy and practical solution to correctly define these specifications by simply answering a series of questions about your site (type of element, type of environment, mode of unloading concrete, etc.). The application will provide you with all the data to be specified in the specifications and when ordering: environmental class (es), consistency class, nominal size of aggregates, ...This first version focuses on the most frequent cases and other specifications may be necessary for particular uses such as: concrete for civil engineering structures, fiber-reinforced concrete, shotcrete, light or heavy concrete, colloidal concrete, colored concrete, road concrete, ...