Blended cements, where Portland cement clinker is partially replaced by supplementary cementitious materials (SCMs), provide the most feasible route for reducing carbon dioxide emissions associated with concrete production. However, lowering the clinker content can lead to an increasing risk of neutralisation of the concrete pore solution and potential reinforcement corrosion due to carbonation. carbonation of concrete with SCMs differs from carbonation of concrete solely based on Portland cement (PC). This is a consequence of the differences in the hydrate phase assemblage and pore solution chemistry, as well as the pore structure and transport properties, when varying the binder composition, age and curing conditions of the concretes. The carbonation mechanism and kinetics also depend on the saturation degree of the concrete and CO2 partial pressure which in turn depends on exposure conditions (e.g. relative humidity, volume, and duration of water in contact with the concrete surface and temperature conditions). This in turn influence the microstructural changes identified upon carbonation. This literature review, prepared by members of RILEM technical committee 281-CCC carbonation of concrete with supplementary cementitious materials, working groups 1 and 2, elucidates the effect of numerous SCM characteristics, exposure environments and curing conditions on the carbonation mechanism, kinetics and structural alterations in cementitious systems containing SCMs.

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了解具有补充胶凝材料的混凝土的碳化：RILEM TC 281-CCC 的批判性审查

混合水泥，其中波特兰水泥熟料部分被补充胶结材料 (SCM) 替代，为减少与混凝土生产相关的二氧化碳排放提供了最可行的途径。然而，降低熟料含量会导致混凝土孔隙溶液中和的风险增加，并且由于碳化作用可能导致钢筋腐蚀。使用 SCM 的混凝土碳化不同于仅基于波特兰水泥 (PC) 的混凝土碳化。这是由于混凝土的粘合剂成分、龄期和养护条件不同时，水合物相组合和孔隙溶液化学性质以及孔隙结构和传输特性存在差异的结果。碳化机制和动力学还取决于混凝土的饱和度和 CO2 分压，而后者又取决于暴露条件（例如，相对湿度、体积和水与混凝土表面接触的持续时间和温度条件）。这反过来又会影响在碳化时确定的微观结构变化。这篇文献综述由 RILEM 技术委员会 281-CCC 与补充胶凝材料的混凝土碳化、工作组 1 和 2 的成员编写，阐明了众多 SCM 特性、暴露环境和固化条件对碳化机制、动力学和结构改变的影响在含有 SCM 的水泥体系中。水与混凝土表面和温度条件接触的持续时间）。这反过来又会影响在碳化时确定的微观结构变化。这篇文献综述由 RILEM 技术委员会 281-CCC 与补充胶凝材料的混凝土碳化、工作组 1 和 2 的成员编写，阐明了众多 SCM 特性、暴露环境和固化条件对碳化机制、动力学和结构改变的影响在含有 SCM 的水泥体系中。水与混凝土表面和温度条件接触的持续时间）。这反过来又会影响在碳化时确定的微观结构变化。这篇文献综述由 RILEM 技术委员会 281-CCC 与补充胶凝材料的混凝土碳化、工作组 1 和 2 的成员编写，阐明了众多 SCM 特性、暴露环境和固化条件对碳化机制、动力学和结构改变的影响在含有 SCM 的水泥体系中。