Impact of slag on carbonation rate of concrete based on calcium aluminate cement

Throughout their service life, concrete structures are exposed to various environmental conditions that affect durability. The cementitious matrix inevitably comes into contact with air, which leads a progressive carbonation reaction. As result of carbonation, changes occur in the microstructure and porosity matrix. Calcium aluminate cement is produced increase resistance composites aggressive environments, but its application limited by occurrence conversion process. addition slag inhibits process calcium prevents reduction compressive strength due formation C 2 ASH 8 hydrate, while contributing net zero commitment industry. It remains an open question how these caused rate cement-based concrete. Therefore, objective this study was determine effects on aluminate-based before after accelerated carbonation. For purpose, mechanical properties, porosity, reaction product mix containing 30% replacement were compared exposure 3% CO for 7 28 days. Thermogravimetric analysis (TGA) mercury intrusion porosimetry (MIP) tested understand products pore size distribution, respectively.