کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
258213 503613 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermo-physical properties of concrete exposed to high temperature
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Thermo-physical properties of concrete exposed to high temperature
چکیده انگلیسی


• Thermo-physical properties of concrete at elevated temperatures are investigated.
• Thermal conductivity of concretes did not significantly change up to 300 °C.
• Moisture resistance factor of all concrete series reduced at 300 °C.
• Thermal conductivity and moisture resistance factor had the lowest values at 600 °C.
• Thermo-physical properties of concrete with pozzolans can be predicted.

The processes of heat penetration into a concrete mass are extremely important. Under high temperature effect, chemical composition and physical structure of concrete changes. These changes are primarily observed at the cement paste and then at the aggregates as well. In this paper, the effect of high temperature on thermal conductivity and moisture resistance factor of concrete with different types of pozzolans and aggregates is investigated. These parameters are analyzed in eight different types of concrete mixes depending on the presence of silica fume, granulated blast furnace slag and fly ash with siliceous and calcareous aggregates. In the scope of this study, simplified formulas of second order with high correlation factors have been derived that give thermal conductivity and moisture resistance factor as a function of temperature in the range of 0–600 °C for the concrete series separately.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 45, August 2013, Pages 157–161
نویسندگان
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