Formation and properties of C-S-H-PEG nano-structures
Formation and properties of C-S-H-PEG nano-structures
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DOI：
10.1617/s11527-008-9439-x
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发表时间：
2009-08-01
影响因子：
3.8
通讯作者：
Alizadeh, Rouhollah
中科院分区：
文献类型：
--
作者：
Beaudoin, James J.;Drame, Harouna;Alizadeh, Rouhollah
本文报道了聚乙二醇（PEG）与合成的和预处理的C-S-H的插层势的研究结果。讨论了PEG分子在C-S-H层间的部分插层。利用XRD、C-13 CP和Si-29 MAS NMR和DTGA显示PEG分子与C-S-H表面的有效和强的相互作用。C-S-H的002低角XRD峰的位置和特征受干燥程序和插层前伴随的化学处理以及反应温度的影响。在严重干燥和用蒸馏水或PEG插层后，初始002位置的恢复是不完全的，但伴随着强度的增加。据推断，C-S-H粘合剂在混凝土中的稳定性可以受到取决于固化温度和化学外加剂的使用的纳米结构的变化的影响。
Results of an investigation of the intercalation potential of polyethylene glycol (PEG) with synthetic and pre-treated C-S-H are reported. The partial intercalation of PEG molecules in the interlayer of C-S-H is discussed. The effective and strong interaction of PEG molecules with the C-S-H surface was shown using XRD, C-13 CP and Si-29 MAS NMR, and DTGA. The position and character of the 002 low angle XRD peak of C-S-H are affected by drying procedures and concomitant chemical treatment preceding intercalation and the reaction temperature. Recovery of the initial 002 position after severe drying and intercalation with distilled water or PEG is incomplete but is accompanied by an increase in intensity. It is inferred that the stability of C-S-H binders in concrete can be impacted by a variation in nanostructure dependent on curing temperature and use of chemical admixtures.