Abstract Carbonation is one major alteration process of cementitious materials. It can be monitored through several methods, all destructive. In this study, some preliminary investigations were conducted to monitor the carbonation process of pure portlandite with an in situ and non-destructive spectroscopic method. This complementary approach was motivated by a literature review indicating the benefits of Raman spectroscopy, but requiring innovative approaches for data acquisition and analysis. The material was selected to validate this spectroscopic monitoring, coupled with chemometrics tools to allowing an early detection of the carbonation reaction through a structure identified in the spectra data population. The carbonation occurred abruptly, and spectra analysis indicated the occurrence of phases synonymous of microstructural evolutions. Varying the atmospheric percentage of CO2 (0.04% - 4%) conducted to an appreciation of the kinetics of the carbonation front through the same thickness of portlandite.

中文翻译：

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便携式定量共焦拉曼光谱：碳化化学和动力学的无损方法

摘要 碳化是胶凝材料的一种主要变质过程。它可以通过多种方法进行监控，所有方法都是破坏性的。在这项研究中，进行了一些初步调查，以使用原位和非破坏性光谱方法监测纯硅酸盐的碳化过程。这种补充方法的动机是文献综述表明拉曼光谱的好处，但需要创新的数据采集和分析方法。选择该材料来验证这种光谱监测，再加上化学计量学工具，可以通过光谱数据群中确定的结构早期检测碳酸化反应。碳酸化发生突然，光谱分析表明发生了与微观结构演化同义的相。