環境配慮型コンクリート（材料）1

[1177] TOWARDS AMINE-BASED CO₂ CAPTURE IN CEMENT-BASED MATERIALS

KIRUSHNSPILLAI Kopitha¹, YOGARAJAH Elakneswaran¹, SENBOKU Hisanori¹, YODA Yuya² (1.Hokkaido University 2.Shimizu Corporation)

キーワード：CO₂ capture、amine、cement-based materials、polymorph of CaCO3、Ca-rich solutions

CO2 capture by amines using cement-based materials is vital to reduce the CO2 in the environment. In this study, three different amines (AEEA, MAE and MDEA) from different amine groups were selected. Moreover, their effects on the precipitation of CaCO3, pH and the type of polymorph of CaCO3 were investigated during carbonation in different Ca-rich solutions (Ca(OH)2, C-S-H and hydrated cement powder). Results indicated that MAE obtained the highest precipitation of CaCO3 in all three Ca-rich solutions. In addition, amine addition influenced the polymorph type of CaCO3.