Abstract The subject of concrete recycling is regarded as very important in the general attempt for sustainable development in our times. In a parallel manner, it is directly connected with (a) increase of demolition structures past out of performance time, (b) demand for new structures and (c) results––especially in Greece––of destruction by natural phenomena (earthquakes, etc.). The present paper refers to the concrete recycling subject and, more specifically, to a proposal for Greek specifications of recycled concrete aggregates (RCA) with reference to international experience and practice. The existence of Greek specifications of RCA––the European ones will come much later––will help Olympic Games 2004 to be as “green” as possible.