Study on the hydration product of cement in early age using TEM
Study on the hydration product of cement in early age using TEM
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DOI：
10.1007/s11431-012-4860-3
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发表时间：
2012-08-01
影响因子：
4.6
通讯作者：
Liu RengGuang
中科院分区：
文献类型：
--
作者：
Han Song;Yan PeiYu;Liu RengGuang
利用透射电镜（TEM）研究了水泥早期水化产物Ca（OH）2、CSH凝胶、AFt和AFm的形貌、结晶和元素组成。通过与SEM和XRD的对比，讨论了TEM方法在研究早期水化产物中的优势。结果表明，透射电镜法比扫描电镜法更能准确、可靠地研究早期水化产物。CSH凝胶在水化初期为无定形的箔状产物，具有大量的褶皱。其Ca/Si比为1.3 +/- 0.2。阐明了AFt和AFm的形态差异。AFt和AFm都是由无序纳米晶组成的层状结构多晶。纳米晶的尺寸小于20 nm。分析了SEM和TEM测量Ca/Si比值结果的差异，并解释了其原因。
The morphology, crystallization and elemental composition of cement hydration products in early age including Ca(OH)(2), CSH gel, AFt and AFm were investigated by transmission electron microscopy (TEM). Compared with the results from SEM and XRD, the TEM method and its advantage in the investigation of early hydration products were discussed. The results showed that TEM method is more accurate and reliable than SEM in the investigation of early hydration products. The CSH gel was confirmed to be amorphous foil-like shape product with a lot of crumples in early hydration age. Its Ca/Si ratio is 1.3 +/- 0.2. The morphology difference of AFt and AFm was clarified. AFt and AFm are both poly-crystal with layered structure, composed of disordered nano crystal. The size of nano crystal is less than 20 nm. The difference of Ca/Si ratio results between SEM and TEM was investigated, and its reason was explained.