The γ-C₂S that constitutes stainless-steel argon oxygen decarburization (AOD) slag is known to generate calcite and silicate gel through reaction with CO_2. In this study, the mechanical performance and microstructure characteristics of cementitious materials that contained AOD slag were investigated with respect to carbonation. AOD slag that contained 38.1% γ-C₂S was used. It was crushed into two different finenesses; and paste specimens were prepared, in which up to 60% of ordinary Portland cement (OPC) was replaced by AOD slag. The specimens were cured in environments with CO₂ concentrations of 0%, 5%, 10%, and 15%, to analyze the influence of the CO₂ concentration. The compressive strengths were measured for the evaluation of the mechanical performances; and the pore size distributions were measured using a mercury intrusion penetrometer, to examine microstructural changes. Thermogravimetry/derivative thermogravimetry (TG-DTG) analyses were employed for the measurement of the CO₂ uptake, and the influences of the CO₂ uptake on the compressive strength and microstructure were analyzed. In the non-CO₂ curing environment, the compressive strength decreased and the number of pores increased as the substitution rate of the AOD slag increased. However, when the CO₂ concentration increased, the specimen with AOD slag exhibited a decrease in the porosity and increase in strength. The influence of the fineness of the AOD slag was significantly different when the substitution rate was 30%, and non-significant when it was 60%.

所述γ-C ₂ s表示构成不锈钢氩氧脱碳法（AOD）炉渣已知通过与CO反应，生成方解石和硅酸盐凝胶_2.在这项研究中，水泥材料的含有AOD渣的机械性能和微观结构特征是就碳酸化进行了调查。AOD渣含有38.1％γ-C ₂ S为使用。它被粉碎成两种不同的细度。并准备了糊状样品，其中多达60％的普通硅酸盐水泥（OPC）被AOD炉渣代替。样品在CO ₂浓度为0％，5％，10％和15％的环境中固化，以分析CO ₂的影响浓度。测量抗压强度以评估机械性能。并使用压汞渗透仪测量孔径分布，以检查微结构变化。采用热重/导数热重分析（TG-DTG）分析CO ₂吸收量，分析了CO ₂吸收量对压缩强度和微观结构的影响。在非CO ₂固化环境中，随着AOD渣的替代率增加，抗压强度降低，孔数量增加。但是，当CO ₂随着浓度的增加，带有AOD炉渣的试样的孔隙率降低，强度增加。当替代率为30％时，AOD炉渣细度的影响显着不同，而当替代率为60％时，其影响不显着。