Quantitative evaluation of cement paste carbonation using Raman spectroscopy
Quantitative evaluation of cement paste carbonation using Raman spectroscopy
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DOI：
10.1038/s41529-021-00181-6
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发表时间：
2021-06-25
影响因子：
5.1
通讯作者：
Wang, Yaocheng
中科院分区：
文献类型：
--
作者：
Mi, Tangwei;Li, Yongqiang;Wang, Yaocheng
碳化腐蚀是钢筋混凝土结构的主要耐久性问题之一。要解决这一问题，有必要通过定量检测二氧化碳的进入和碳化深度来了解碳化的潜在机理。本文论证了拉曼光谱作为一种强有力的技术手段对水泥浆体碳化进行定量分析的潜力。在本工作中，利用几个预混有一定量CO32-的标准样品，初步建立了CO32-含量与拉曼峰强度之间的关系。然后将建立的关联式用于研究二氧化碳扩散情况下水泥浆体的碳化，结果表明与热重测量得到的结果很好地吻合。因此，可以论证拉曼光谱用于量化水泥浆体碳化程度的可行性。
Carbonation induced corrosion is one of the major durability issues for reinforced concrete structures. To address this issue, it is essential to understand the underlying mechanism of carbonation by detecting the ingress of the CO2 and carbonation depth quantitatively. This paper demonstrates the potential of Raman spectroscopy, as a powerful technique, to implement quantification analysis of cement paste carbonation. In present work, the correlation between the content of the CO32- and the Raman peak intensity was initially established by using several standard specimens premixed with certain amount of CO32-. The established correlation was then used to investigate the carbonation of the cement paste in a CO2 diffusion scenario, and the results show a good agreement with that obtained by thermogravimetry measurements. Therefore, the feasibility of the Raman spectroscopy to quantify the carbonation degree of the cement paste can be demonstrated.