Carbonation curing for cement-based materials can be applied as a green concrete production technology, which provides a promising route to economic CO₂ sequestration. The substitution of cement by industrial solid waste could further reduce the carbon footprint of concrete. This study proposed a sustainable building material of CO₂ mineralization slag (CMS) from the wet process. Based on the accelerated carbonation experiment of Portland cementitious materials, the feasibility of blending CMS as enhanced addition is evaluated. This study discussed the effects of CMS aggregate on CO₂ sequestration capacity and mechanical property during CO₂ curing, and further investigated the related physicochemical mechanisms. It is revealed that the increase of CaCO₃/SiO₂ ratio would promote the nucleation and crystallization of CaCO₃ microcrystal and result in higher CO₂ uptake. With optimum CMS addition ratio of 30% and CaCO₃/SiO₂ ratio of 4:1, the carbonation degree can be increased by 74.2% in comparison with pure cement paste. Unlike natural curing (28d), a significant strength increment of 40% is observed after pure CO₂ curing at 40℃ and 1.5 MPa with a 20% addition of CMS. It is considered that the strength gain is primarily contributed by the intensifying of the interfacial transition zone after CO₂ curing. The Klinkenberg permeability tests verified the densification effect of carbonation. These findings provide a guidance for the industrial application of CO₂ mineralization slag as the sustainable building material.

水泥基材料的碳化固化可以用作绿色混凝土生产技术，这为经济隔离CO ₂提供了有希望的途径。用工业固体废物代替水泥可以进一步减少混凝土的碳足迹。这项研究提出了一种湿法生产的可持续的CO ₂矿化渣（CMS）建筑材料。基于硅酸盐水泥质材料的加速碳化实验，评估了将CMS混合为增强添加剂的可行性。本研究中所讨论的CMS骨料对CO的影响₂ CO期间螯合能力和机械性能₂固化，并进一步研究了相关的理化机理。结果表明，CaCO ₃ / SiO ₂比的增加会促进CaCO ₃微晶的成核和结晶，并导致较高的CO ₂吸收。与30％的CMS最佳添加比率和4：1的CaCO ₃ / SiO ₂比率相比，与纯水泥浆相比，碳化度可以提高74.2％。与自然固化（28d）不同，在纯CO ₂在40℃和1.5 MPa的条件下，添加20％的CMS进行纯CO ₂固化后，强度可明显提高40％。可以认为，强度增加主要是由于CO后界面过渡区的增强所致。₂固化。Klinkenberg渗透性测试验证了碳化的致密化作用。这些发现为CO ₂矿渣作为可持续建筑材料的工业应用提供了指导。