کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8012181 | 1516939 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
NMR research on deterioration characteristics of microscopic structure of sandstones in freeze-thaw cycles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to study the deterioration characteristics of the microscopic structure of sandstones in freeze-thaw cycles, tests of 180 freeze-thaw cycles were performed on sandstone specimens. The nuclear magnetic resonance (NMR) technique was applied to the measurement of sandstone specimens and analysis of the magnetic resonance imaging. Then, the fractal theory was employed to compute the fractal dimension values of pore development of rocks after different freeze-thaw cycles. The results show that the mass and porosity of rocks grow with the increase of freeze-thaw cycles. According to the NMR T2 distribution of sandstones, the pore sizes of rock specimens increase after 180 freeze-thaw cycles, especially that of the medium-sized and small-sized pores. The spatial distribution of sandstone pores after freeze-thaw cycles has fractal features within certain range, and the fractal dimension of sandstones tends to increase gradually.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 11, November 2016, Pages 2997-3003
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 11, November 2016, Pages 2997-3003
نویسندگان
Jie-lin LI, Ke-ping ZHOU, Wei-jie LIU, Hong-wei DENG,