Carbonating Additive That Adds High Functionality to Concrete from the Reaction with Carbon Dioxide

Abstract

In response to the Japanese government’s carbon neutrality declaration, efforts toward carbon neutrality are accelerated in various industry sectors. In the field of cement and concrete, carbon recycling technology has been attracting attention as one of the approaches to reducing CO₂ emissions, and CO₂ absorbent concrete, which can reduce the amount of cement used and absorb and fix CO₂ while achieving the same strength from carbonation curing as conventional products by the time of shipping, is now in practical use. This paper reviews the development and demonstration of carbonating additive, a key material for CO₂ absorbent concrete, and describes the characteristics obtained from carbonating curing and the knowledge obtained thus far.