کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1456132 | 1509749 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of water vapour and carbon dioxide on surface composition of C3A polymorphs studied by X-ray photoelectron spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
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چکیده انگلیسی
The surface specific analytical method, X-ray photoelectron spectroscopy (XPS), has been used to study the effects of water vapour and CO2 on the cubic and orthorhombic polymorphs of C3A. Significant differences between the two polymorphs were observed in the XPS spectra. Upon exposure to water vapour, both polymorphs produced C4AH13 on their surfaces. Additionally, the sodium-doped o-C3A developed NaOH and traces of C3AH6 on its surface. Subsequent carbonation yielded mono carboaluminate on both polymorphs. Large amounts of Na2CO3 also formed on the surface of o-C3A as a result of carbonation of NaOH. Furthermore, the extent of carbonation was much more pronounced for o-C3Ao than for c-C3A.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 73, July 2015, Pages 36–41
Journal: Cement and Concrete Research - Volume 73, July 2015, Pages 36–41
نویسندگان
E. Dubina, J. Plank, L. Black,