کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8906356 | 1634409 | 2018 | 49 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of temperature and moisture content on sandstone thermal conductivity from a case using the artificial ground freezing(AGF) method
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermal conductivity (TC) of rocks is influenced by a number of environmental factors including temperature, moisture content, and pressure. A series of experiments are presented in this work to address the influence of temperature both sides of the freezing point 0â¯Â°C as well as moisture content on sandstone TC values. All of the specimens discussed were collected from a coal mine shaft excavation using the artificial ground freezing (AGF) method. Thus, TC values of 32 pairs of medium grained sandstone and 21 pairs of coarse grained sandstone specimens were measured at temperatures ranging between â30â¯Â°C and 50â¯Â°C. The results show that TC values tend to increase as temperature decreases regardless of whether specimens are dry or water-saturated. It is also the case, however, that water-saturated specimens commonly have higher TC values than their dried counterparts at different target temperatures, especially at the range of between 5â¯Â°C andâ¯ââ¯10â¯Â°C, while TC values of water-saturated specimens exhibited rapid increases. This phenomena also shows a good agreement with the deflection zone presented in Raman spectral peak values, clear evidence for the water-ice phase transition period.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 155, November 2018, Pages 149-160
Journal: Cold Regions Science and Technology - Volume 155, November 2018, Pages 149-160
نویسندگان
Yan-jun Shen, Yong-zhi Wang, Xiao-dong Zhao, Geng-she Yang, Hai-liang Jia, Teng-long Rong,