کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1454715 1509688 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of circulating fluidized bed combustion ash on the properties of roller compacted concrete
ترجمه فارسی عنوان
تأثیر خاکستر احتراق کوره ذوب سیلیس بر خصوصیات بتن فشرده غلتکی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی

Circulating fluidized bed combustion (CFBC) ash, which has such a high content of f-CaO and SO3, is a waste or by-product of petroleum coke combustion power stations. The purpose of this study is to investigate the effects of CFBC ash on the properties of roller compacted concrete (RCC). CFBC ash was used to replace fine aggregate with various dosages (5%, 10% and 15%) by weight. All mixtures were designed according to ACI 211.3R and prepared for testing. During casting, cylinders were vibrated and compacted with different pressures of 25 g/cm2, 50 g/cm2 and 75 g/cm2, respectively. Test results show that CFBC ash can increase the water absorption and effectively reduce the initial surface absorption. Meanwhile, CFBC ash has a positive effect on compressive strength, splitting tensile strength, and sulphate attack resistance of hardened RCC. SEM revealed that the main hydration products of specimens containing CFBC ash are AFt (ettringite), C–S–H (hydrated calcium silicate) and portlandite. Based on the presented observations and results, RCC with the dosage of 5% CFBC ash as fine aggregate replacement and the roller compaction pressure of 75 g/cm2 is recommended.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 45, January 2014, Pages 148–156
نویسندگان
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