硅酸盐水泥水化产物微纳结构的原位研究  

In-situ Study on Micro-Nano Structure of Portland Cement Hydration Products

作　　者：朱哲誉 王中平[1] 周玥 陈钰婷 吴凯[1] ZHU Zheyu;WANG Zhongping;ZHOU Yue;CHEN Yuting;WU Kai(School of Materials Science and Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]先进土木工程材料教育部重点实验室,同济大学材料科学与工程学院,上海201804

出　　处：《硅酸盐学报》2021年第8期1699-1705,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51772212,51978505)。

摘　　要：采用BSE-Raman原位表征了硅酸盐水泥水化产物的Raman光谱和空间分布。结果表明:BSE-Raman能够原位获取水化硅酸钙(C–S–H)中硅氧四面体链Q^(1)、Q^(2)、Q^(3)的结构信息。不同形貌组分的原位Raman光谱均由多种水化产物的Raman特征峰组成,即水泥水化产物在纳米尺寸存在混合现象。其中,占比最大的绒球状骨架主要由C–S–H和钙矾石(AFt)组成。BSE-Raman可快速、原位、精确识别不同的物相,在水泥基材料微结构表征方面具有广阔前景。BSE-Raman was used to investigate in-situ Raman spectra of hydration products and their spatial distribution profiles. It was found that the in-situ structural information of the silicon-oxygen tetrahedral Q^(1), Q^(2) and Q^(3) chains of C–S–H could be readily obtained, while the hydration products could be accurately identified. All the hydration products with different morphologies exhibited multiple characteristic peaks of chemical bonds of the hydration products. Therefore, it was concluded that the cement hydration products were mixed at nanometer scale. The pom-shaped hydration product had a skeleton consisting of C–S–H and ettringite. Due to its ability of quick and accurate in-situ identification of different phases, BSE-Raman has broad prospects in the microstructural characterization of cement-based materials.

关 键 词：硅酸盐水泥 RAMAN光谱 原位 水化硅酸钙 钙矾石 

分 类 号：TU525[建筑科学—建筑技术科学]