کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1454257 | 1509660 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dielectric characterization of concrete at high temperatures
ترجمه فارسی عنوان
مشخصه دی الکتریک بتن در دمای بالا
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کلمات کلیدی
مجاورت مجتمع، خواص الکتریکی، پردازش مایکروویو، درجه حرارت بالا، بتن سیمان پرتلند، ترموگرافی سنجی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
For reliable modelling of microwave heating of concrete its complex permittivity has to be known precisely within the full range of working temperatures. Dielectric characterization of dry concrete cured with different water-to-cement (w/c) ratios and concrete samples from nuclear power plant constructions was performed during heating and cooling cycles from room temperature to 700 °C and back. On average, higher permittivity values are found for concretes cured with smaller w/c ratio (more dens and less porous) as compared to concretes cured with higher w/c ratio (lighter and more porous). Samples from nuclear power plant reveals a permittivity close to the concrete prepared with lowest w/c ratio. Permittivity change along increasing temperature correlates with moisture loss and thermal decomposition reactions. These reactions are irreversible that lead to a permittivity divergence in heating and cooling scenarios. The variations of concrete permittivity because of w/c ratio, water transport and decomposition reactions are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 73, October 2016, Pages 54-61
Journal: Cement and Concrete Composites - Volume 73, October 2016, Pages 54-61
نویسندگان
Sergey Soldatov, Martin Umminger, Annette Heinzel, Guido Link, Benjamin Lepers, John Jelonnek,