利用拉曼光谱法建立碳化曲线：粉煤灰和粒化高炉矿渣的影响

Establishing the Carbonation Profile with Raman Spectroscopy: Effects of Fly Ash and Ground Granulated Blast Furnace Slag.

作者信息

Yue Yanfei, Wang Jing Jing, Basheer P A Muhammed, Bai Yun

机构信息

College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba, Chongqing 400044, China.

CRANN and AMBER Research Centers, Trinity College Dublin, D02 PN40 Dublin 2, Ireland.

出版信息

Materials (Basel). 2021 Apr 5;14(7):1798. doi: 10.3390/ma14071798.

DOI:10.3390/ma14071798

PMID:33916458

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8038619/

Abstract

Establishing the carbonation profile is of great significance to the prediction of the service life of reinforced concrete structures. In our previous work, Raman spectroscopy was shown to be an efficient tool for characterizing calcium carbonate (CaCO) polymorphs and their profile in plain Portland cement (PC) matrices. However, as supplementary cementitious materials (SCMs), particularly fly ash (FA) and ground granulated blast furnace slag (GGBS), are widely used in concrete, establishing the carbonation profile without considering the possible effects of these SCMs could be of little significance to the real world. This paper, thus, investigated the effects of FA and GGBS on the working capacity and reliability of Raman spectroscopy for establishing the carbonation profile in PC blends containing SCMs. The thermogravimetry (TG) analysis was also conducted to verify the results from Raman spectroscopy. The results show that Raman spectroscopy demonstrated a good capacity for differentiating the variation of CaCO contents in FA or GGBS blends. However, the incorporation of FA and GGBS into the PC system caused some adverse effects on the quantification of CaCO by Raman spectroscopy, which could be attributed to the darker color and weak scatter nature of FA and the high content of glassy phases in GGBS.

摘要

建立碳化剖面对于预测钢筋混凝土结构的使用寿命具有重要意义。在我们之前的工作中，拉曼光谱被证明是表征碳酸钙（CaCO）多晶型物及其在普通硅酸盐水泥（PC）基体中分布的有效工具。然而，由于辅助胶凝材料（SCMs），特别是粉煤灰（FA）和磨细粒化高炉矿渣（GGBS），在混凝土中被广泛使用，在不考虑这些SCMs可能影响的情况下建立碳化剖面对于实际应用可能意义不大。因此，本文研究了FA和GGBS对拉曼光谱在含SCMs的PC混合物中建立碳化剖面的工作能力和可靠性的影响。还进行了热重分析（TG）以验证拉曼光谱的结果。结果表明，拉曼光谱在区分FA或GGBS混合物中CaCO含量变化方面表现出良好的能力。然而，将FA和GGBS掺入PC体系对拉曼光谱定量CaCO产生了一些不利影响，这可能归因于FA的深色和弱散射性质以及GGBS中高含量的玻璃相。