کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10156315 | 1666386 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Utilization of flue gas desulfurization gypsum as an activation agent for high-volume slag concrete
ترجمه فارسی عنوان
استفاده از گچ سولفوریزاسیون گاز دودکش به عنوان عامل فعال سازی برای حجم بالا سرباره بتن
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
بتن سرباره، گچ سولفوریزاسیون دودکش عامل فعال قدرت روانی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Production of cement has been resources and energy intensive, leaving massive carbon footprint. The use of slag as an admixture reduces CO2 intensity of concrete production by replacing a fraction of cement clinker with industrial solid waste. However, concrete with high volume of slag addition suffers loss in early-age strength, slow hydration and large drying shrinkage. To address this issue, flue gas desulfurization gypsum was added as an activation agent for slag in the present work. The effects of flue gas desulfurization gypsum addition on compressive strength, elastic modulus, resistance to carbonation, chloride ion diffusion and drying shrinkage were examined. XRD and SEM analyses were conducted to investigate the hydration products and microscopic structure. The results show that the early-age (3â¯d and 7â¯d) compressive strength of concrete increases with increasing gypsum content, reaching an optimum at 5â¯wt% gypsum content. Flue gas desulfurization gypsum addition does not affect the correlation between the elastic modulus of concrete, nor does it affect concrete resistance to chloride ion diffusion, though slight improvement in carbonation resistance is observed. Reduction in drying shrinkage is evident when the gypsum is added. XRD and SEM analyses indicate that formation of ettringite (AFt) is strongly promoted by the gypsum addition, which suggests a likely reason for the improved early-age strength and reduced drying shrinkage. With flue gas desulfurization gypsum addition, as much as 55% reduction in CO2 intensity of concrete production can be achieved with no loss in concrete strength. The synergetic use of flue gas desulfurization gypsum and slag makes concrete production much cleaner while turning both types of industrial solid wastes into valuable resources.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 205, 20 December 2018, Pages 589-598
Journal: Journal of Cleaner Production - Volume 205, 20 December 2018, Pages 589-598
نویسندگان
Linhua Jiang, Chenzhi Li, Chao Wang, Ning Xu, Hongqiang Chu,