کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6724129 503607 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of bacterial treated cement kiln dust on the properties of concrete
ترجمه فارسی عنوان
تأثیر کوره های کوره های سیمان درمان شده باکتری ها بر خواص بتن
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
During cement manufacturing, cement kiln dust (CKD) is generated which represents significant environment concern related to its emission, disposal and reuse due to high alkalinity. This study presents the effect of bacterial (Bacillus halodurans strain KG1) treated cement kiln dust on the compressive strength, water absorption and porosity (at 7, 28 and 91 days) of concrete after reducing the alkalinity. Concrete specimens were prepared with 0%, 5%, 10% and 15% untreated and treated CKD replacing cement. Test results indicated that 7.15% and 26.6% increase in strength of concrete was achieved at 28 and 91 days, respectively, with the addition of bacterial treated 10% CKD whereas reduction in water absorption (20%) and porosity (12.35%) was observed at 91 days. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results suggested that in bacterial treated 10% CKD concrete increased calcium silicate hydrate and formation of non-expansive ettringite in pores dense the concrete structure resulted in increased compressive strength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 52, 15 February 2014, Pages 42-51
نویسندگان
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