کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6703145 1428507 2018 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An assessment of microcracks in the Interfacial Transition Zone of durable concrete composites with fly ash additives
ترجمه فارسی عنوان
ارزیابی میکروارگانیسم ها در منطقه انتقال بین فازهای کامپوزیت های بتنی مقاوم با افزودنی های خاکستر
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
This paper presents results of tests on the effect of the addition of fly ashes (FA) in the amount of: 0, 20 and 30% by weight of cement on the size of microcracks in concrete composites. The analyses were carried out based on the results of the microstructural tests, by using Scanning Electron Microscope (SEM). During investigations the size of microcracks occurring in the Interfacial Transition Zone (ITZ) of coarse aggregate with cement matrix was evaluated. In the own testing, it was demonstrated that addition of FA modifies the microstructure of the ITZ. Composites with FA at early age are characterized by greater microcrack width in the ITZ in comparison to the unmodified concrete. In matured concretes the smallest microcracks occur in composite with the 20% FA additive. It can be concluded that the mature composites with 20% addition of FA are characterized by low permeability and therefore high durability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 200, 15 September 2018, Pages 515-520
نویسندگان
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