コンクリート廃棄物を利用した二酸化炭素の有効利用技術

Abstract

Concrete is widely used as a construction material worldwide. Effective recycling and utilization of concrete waste are of great importance to improve our society. Approximately one third of concrete is chemically reactive and strongly alkaline hydrate cement, which can be used for fixation of CO2 as stable carbonate compounds. In this article, the reaction mechanism and advantages of concrete carbonation are summarized, and an indirect carbonation process for concrete sludge and a direct carbonation process for demolished concrete waste are introduced.