کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
257737 503600 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of particle packing density on the stability and rheology of self-consolidating concrete containing mineral admixtures
ترجمه فارسی عنوان
اثر چگالی بسته بندی ذرات بر پایداری و رئولاسیون بتن خودمحور که حاوی افزودنی های معدنی است
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• We present a novel wet method for determination of packing density of SCC mixtures.
• The particle size distribution of all of solids in a SCC mixture is considered.
• The stability of SCC mixtures is evaluated in the horizontal and vertical movement.
• We apply a new experimental study for the measurement of solid velocity in SCC mixtures.

This paper presents an experimental study on the influence of packing density of solid particles on the stability and rheology of self-consolidating concrete (SCC). Also it is tried to address a new method for determination the packing density of SCC mixtures. Seven powder-types of SCC mixtures with different packing density were made with inclusion of silica fume, metakaolin or low activity-granulated blast furnace slag as a substitution of Portland cement. Results demonstrated that there is an optimal packing density about 0.804 and a little lower than maximum packing density of 0.807 with minimum static segregation and final plastic settlement. Moreover in the optimum packing density of particles, the calculated velocity and rheological properties of SCC are improved. The results emphasized that the effects of mineral admixtures are completely different in the static and dynamic segregation. Mineral admixtures reduced static segregation (SCC at rest in vertical state) but increase dynamic segregation (SCC at flowing in horizontal state). This finding shows that the cementitious binder content must be sufficient in flowing state to restraint from dynamic segregation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 53, 28 February 2014, Pages 102–109
نویسندگان
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