Carbonation curing can improve material properties and reduce the concrete industry's carbon emissions. This study used powder prepared from waste coral to replace ordinary Portland cement (0, 10, and 20 %). After initial curing for 24 h, the mortar was cured by sealing and carbonation. The dilution effect of coral powder substantially reduces the mechanical properties under sealing curing. Under carbonation curing, the coral powder helps develop carbonation and CO diffusion, reducing strength loss and increasing resistivity. XRD and Fourier transform infrared spectroscopy analysis results showed that carbonation transforms hydration products and clinker phases into different types of CaCO, such as calcite and aragonite. The novelty of this study is that it proposes a method that organically combines carbonation curing and marine waste reuse. Provide a sustainable solution to the problem of material shortage in marine engineering construction. Moreover, the carbon footprint can be considerably reduced by replacing cement materials, improving carbonation curing efficiency, and promoting CO uptake.

中文翻译：

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再生珊瑚废弃混凝土碳化养护行为及性能改进


碳化养护可以改善材料性能，减少混凝土行业的碳排放。这项研究使用废珊瑚制备的粉末来代替普通波特兰水泥（0%、10% 和 20%）。初始养护24小时后，砂浆通过密封和碳化进行固化。珊瑚粉的稀释作用大大降低了密封固化下的机械性能。在碳酸化固化过程中，珊瑚粉有助于碳酸化和二氧化碳扩散，减少强度损失并增加电阻率。 XRD和傅里叶变换红外光谱分析结果表明，碳化作用将水化产物和熟料相转化为不同类型的CaCO，例如方解石和文石。本研究的新颖之处在于提出了一种将碳化固化与海洋垃圾再利用有机结合的方法。为海洋工程建设物资短缺问题提供可持续的解决方案。此外，通过更换水泥材料、提高碳化固化效率和促进二氧化碳吸收，可以大大减少碳足迹。