کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6712107 1428723 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Controlling workability in alkali-activated Class C fly ash
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Controlling workability in alkali-activated Class C fly ash
چکیده انگلیسی
Alkali-activation of Class C fly ashes can produce Portland cement-free binders that take advantage of sodium aluminosilicate hydrate (N-A-S-H) and aluminum-substituted calcium silicate hydrate (C-A-S-H) phases for strength development. However, alkali-activated Class C fly ashes suffer from poor workability and rapid setting; traditional water-reducing admixtures are not effective. In this study, different methods to modify the workability of alkali-activated Class C fly ash mixtures were investigated. Retarders decreased the mixture stiffness and delayed setting, but strength development suffered. Increasing mixing intensity slightly improved workability without significantly impacting strength. Controlling silica modulus significantly improved workability, but the impact on strength was inconsistent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 183, 20 September 2018, Pages 226-233
نویسندگان
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