کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
207695 461223 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Utilization of fly ash with silica fume and properties of Portland cement–fly ash–silica fume concrete
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Utilization of fly ash with silica fume and properties of Portland cement–fly ash–silica fume concrete
چکیده انگلیسی

This paper reports the normal consistency, setting time, workability and compressive strength results of Portland cement–fly ash–silica fume systems. The results show that water requirement for normal consistency was found to increase with increasing SF content while a decrease in initial setting time was found. Workability, measured in term of slump, was found to decrease with silica fume content (compared to blends without silica fume). However, it must be noted that despite the reduction in the slump values, the workability of Portland cement–fly ash–silica fume concrete in most cases remained higher than that of the Portland cement control concrete. Furthermore, the utilization of silica fume with fly ash was found to increase the compressive strength of concrete at early ages (pre 28 days) up to 145% with the highest strength obtained when silica fume was used at 10 wt%. Moreover, scanning electron micrographs show that utilization of fly ash with silica fume resulted in a much denser microstructure, thereby leading to an increase in compressive strength.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 89, Issue 3, March 2010, Pages 768–774
نویسندگان
, , ,