کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6724693 503609 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Freeze-thaw resistance of alkali-slag concrete based on response surface methodology
ترجمه فارسی عنوان
مقاومت در برابر یخ زدگی بتن قلیایی-سرباره بر اساس روش سطح پاسخ
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
Alkali-slag concrete (ASC), with the frost resistant grade of above F300 and frost resistant coefficient DF of about 90%, is prepared using slag and composite activator composed of Na2SiO3 and NaOH. Response surface methodology (RSM) is applied to study the freeze-thaw resistance of ASC. The effects of activator solution-slag ratio (A/S), slag content and sand ratio on the freeze-thaw resistance are analyzed using the softwares of Design Expert and Box-Benhnken Design (BBD). Models are established for DF and the influence of air-void structure of hard concrete on the freeze-thaw resistance, respectively. The result shows that the DF model coincides well with the test results and can be used to analyze and predict the freeze-thaw resistance of ASC. The influence on the freeze-thaw resistance from high to low is A/S, slag content and sand ratio. The interaction of A/S and slag content is the most prominent and air-void structure is the crucial factor. The air bubble space coefficient and its specific surface area have good correlation with DF. The freeze-thaw resistance tends to better with smaller air bubble space coefficient and bigger specific surface area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 49, December 2013, Pages 70-76
نویسندگان
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