Surface carbonation of synthetic C-S-H samples: A comparison between fresh and aged C-S-H using X-ray photoelectron spectroscopy
Surface carbonation of synthetic C-S-H samples: A comparison between fresh and aged C-S-H using X-ray photoelectron spectroscopy
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DOI：
10.1016/j.cemconres.2008.02.003
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发表时间：
2008-06-01
影响因子：
11.4
通讯作者：
Gee, Ian
中科院分区：
文献类型：
--
作者：
Black, Leon;Garbev, Krassimir;Gee, Ian
本文继续用X射线光电子能谱（XPS）研究硅酸盐阴离子结构。用机械化学方法制备了一系列C-S-H样品，并在室温下储存了6个月。储存导致表面碳酸化，其程度取决于新鲜样品的钙/硅比。碳酸化通过C-S-H的脱钙而产生，导致硅酸盐聚合增加。最富钙相（C/S = 1.33和1.50）的表面进行完全脱钙，产生二氧化硅（可能含有一些硅烷醇基团）和碳酸钙。对于C/S=0.67和0.75的C-S-H相，碳酸化以及因此硅酸盐阴离子结构的变化是最小的。(C)2008爱思唯尔有限公司保留所有权利。
This paper presents a continuation of studies into silicate anion structure using X-ray photoelectron spectroscopy (XPS). A series of C-S-H samples have been prepared mechanochemically, and then stored under ambient conditions for six months. Storage led to surface carbonation, the extent of which was dependent upon the calcium/silicon ratio of the fresh sample. Carbonation arose through decalcification of the C-S-H, leading to increased silicate polymerisation. The surfaces of the most calcium-rich phases (C/S = 1.33 and 1.50) underwent complete decalcification to yield silica (possibly containing some silanol groups) and calcium carbonate. Carbonation, and hence changes in silicate anion structure, was minimal for the C-S-H phases with C/S=0.67 and 0.75. (C) 2008 Elsevier Ltd. All rights reserved.