کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4918246 | 1428755 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ground-Penetrating Radar monitoring of concrete at high temperature
ترجمه فارسی عنوان
نظارت بر رادار بتونی در درجه حرارت بالا
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کلمات کلیدی
بتن، خشک کردن، آتش، رادار زمینی نفوذ، درجه حرارت بالا، فشار بخار، اسپلینگ، تبخیر، اب،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Water front in concrete exposed to rapid heating is the layer where water vaporization and the subsequent pore pressure rise take place. Pore pressure is one of the main triggering factors in heat-induced explosive spalling (relevant for structures, such as tunnels, exposed to fire), while moisture migration influences concrete radiation shielding capability (important in containment shells of nuclear power plants and radioactive waste repositories). Hence, the experimental monitoring of water front in concrete at high temperature is a very interesting - though challenging - task. In a recent experimental campaign carried out at Politecnico di Milano, promising results have been obtained by coupling pore pressure-temperature measurements and water front monitoring through Ground-Penetrating Radar. This technique was implemented in a fire test performed on a concrete slab heated at the bottom face and proved to be effective in detecting the position of the water front during heating. The combination with pressure measurement allowed to confirm that pressure peaks are achieved in correspondence of the water front.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 151, 1 October 2017, Pages 881-888
Journal: Construction and Building Materials - Volume 151, 1 October 2017, Pages 881-888
نویسندگان
Francesco Lo Monte, Federico Lombardi, Roberto Felicetti, Maurizio Lualdi,