کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580994 | 1453155 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Alkali-activated complex binders from class C fly ash and Ca-containing admixtures
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کلمات کلیدی
FFASEM-EDXACFAClass C fly ashC-S-HAlkali-activated binder - اتصال دهنده فعال قلیاییWater treatment residuals - باقی مانده های تصفیه آبWater treatment residual - تصفیه آب باقی ماندهPortland cement - سیمان پرتلندFTIR - طیف سنج مادون قرمزFourier transform infrared spectroscopy - طیف سنجی مادون قرمز تبدیل فوریه یا طیف سنجی FTIRCalcium silicate hydrate - هیدرات کلسیم سیلیکاتWtr - وترX-ray diffraction - پراش اشعه ایکسXRD - پراش اشعه ایکسGeopolymers - ژئوپلیمرهاClass F fly ash - کلاس F خاکستر پروازFlue gas desulfurization gypsum - گچ سولفوریزاسیون دودکش
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Processes that maximize utilization of industrial solid wastes are greatly needed. Sodium hydroxide and sodium silicate solution were used to create alkali-activated complex binders (AACBs) from class C fly ash (CFA) and other Ca-containing admixtures including Portland cement (PC), flue gas desulfurization gypsum (FGDG), and water treatment residual (WTR). Specimens made only from CFA (CFA100), or the same fly ash mixed with 40Â wt% PC (CFA60-PC40), with 10Â wt% FGDG (CFA90-FGDG10), or with 10Â wt% WTR (CFA90-WTR10) had better mechanical performance compared to binders using other mix ratios. The maximum compressive strength of specimens reached 80.0Â MPa. Geopolymeric gel, sodium polysilicate zeolite, and hydrated products coexist when AACB reactions occur. Ca from CFA, PC, and WTR precipitated as Ca(OH)2, bonded in geopolymers to obtain charge balance, or reacted with dissolved silicate and aluminate species to form calcium silicate hydrate (C-S-H) gel. However, Ca from FGDG probably reacted with dissolved silicate and aluminate species to form ettringite. Utilization of CFA and Ca-containing admixtures in AACB is feasible. These binders may be widely utilized in various applications such as in building materials and for solidification/stabilization of other wastes, thus making the wastes more environmentally benign.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 173, Issues 1â3, 15 January 2010, Pages 480-486
Journal: Journal of Hazardous Materials - Volume 173, Issues 1â3, 15 January 2010, Pages 480-486
نویسندگان
Xiaolu Guo, Huisheng Shi, Liming Chen, Warren A. Dick,