کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4913264 | 1428763 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heat treatment of fresh concrete by radio waves - Avoiding delayed ettringite formation
ترجمه فارسی عنوان
حرارتی بتن تازه با امواج رادیویی - اجتناب از تشکیل اترینگیت تاخیر
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کلمات کلیدی
بتن، حرارت درمانی، امواج رادیویی، کنترل دما، طول عمر شکل گیری اترینگیت تاخیر
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Heat treatment of concrete during the early stages of hydration using the new radio wave technology enables a uniform energy supply at distinct rates under steady, closed-loop temperature control. This precise control of temperature makes it possible to implement accurately and uniformly any heat treatment regime based on existing or future guidelines over the entire volume of a concrete element. The article at hand presents this new technology briefly and focuses on the issue of possible delayed ettringite formation which might compromise concrete durability. By means of ESEM- and XRD-analysis the influence of the different heat treatment temperatures on the concrete microstructure could be comprehensively investigated. It was found that a maximum temperature of 60 °C should not be exceeded because higher temperatures cause severe delayed ettringite formation. Dielectric heating as such had no additional influence on microstructural damage, especially on the extent of the formation of delayed ettringite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 143, 15 July 2017, Pages 580-588
Journal: Construction and Building Materials - Volume 143, 15 July 2017, Pages 580-588
نویسندگان
Björn Höhlig, Christof Schröfl, Simone Hempel, Ina Noack, Viktor Mechtcherine, Detlef Schmidt, Ulf Trommler, Ulf Roland,