Concrete Material Bank in Japan toward CO2 recycling

Providing excellent performance as a structural material, concrete has long been essential for modern civilization and recognized as a material that will continue to maintain and support the development of human society. Now that recycling of concrete in a completely closed loop has become technically feasible, concrete is being seen in a new light. On the other hands, the huge issues regarding carbon dioxide emissions all of the world are a concern in the construction field as well as in society. To solve this problem, a concept for new Calcium Carbonate Concrete (CCC) is proposed. This paper is focused on prediction of the resource amount of CCC, which is manufactured by treating concrete waste as a raw material with calcium hydrogen carbonate in which carbon dioxide is dissolved. It was described the details of the amount of supply potential of concrete waste from the past 1950s to the future in 2050s and analysed a resource recycling scenario based on the long-term transition future perspectives.