کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10621908 | 989038 | 2011 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Micro-analysis of “salt weathering” on cement paste
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Micro-analysis of “salt weathering” on cement paste Micro-analysis of “salt weathering” on cement paste](/preview/png/10621908.png)
چکیده انگلیسی
In this research, cement paste and cement-fly ash paste specimens were partially exposed to sodium sulfate and magnesium sulfates solution under a constant storage condition (20 ± 2 °C, and 60 ± 5% RH) and a sharply fluctuating environment (40 ± 2 °C and 35 ± 5% RH for 24 h, then 10 ± 1 °C and 85 ± 5% RH, also for 24 h) respectively. ESEM and SEM images, combined with EDS and XRD analysis, were employed for micro-analysis. The experimental results indicate that Na2SO4 crystals or MgSO4 crystals could not be identified in the cement paste or the cement-fly ash paste, both under constant and fluctuating exposure conditions. Instead, large amounts of ettringite, gypsum and brucite were found and identified as probably one of the determining factors causing failure of cement paste. On the other hand, salt crystallization could be observed in the calcium carbonate crystals, the carbonated products of hydrated cement paste.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 33, Issue 2, February 2011, Pages 179-191
Journal: Cement and Concrete Composites - Volume 33, Issue 2, February 2011, Pages 179-191
نویسندگان
Zanqun Liu, Dehua Deng, Geert De Schutter, Zhiwu Yu,