کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6722931 503592 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of curing methods and concentration of NaOH on strength of the synthesized alkaline activated  ground slag-ultrafine palm oil fuel ash mortar/concrete
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Influence of curing methods and concentration of NaOH on strength of the synthesized alkaline activated  ground slag-ultrafine palm oil fuel ash mortar/concrete
چکیده انگلیسی
Efficiency in energy-utilization in the adoption of curing methods and effects of NaOHaq concentration towards achieving a better strength performance in the synthesis of alkaline activated ground-steel-slag (GSS) with ultrafine palm-oil-fuel ash (UPOFA) - (AAGU) mortars and concrete prompted this study. AAGU samples were prepared with the combined activators (Na2SiO3aq + NaOHaq: (Na2SiO3aq + NaOHaq)/(GSS + UPOFA) = 0.5) while different curing methods namely: oven-cured (60 °C for 24 h), water-ponding and room-cured (25 °C) were also investigated. The findings showed that 76% and 50% of 28-day strength in the oven-cured mortars could be attained in water-ponding and room-curing, respectively. Regardless of the curing methods, GSS/(GSS+UPOFA) and Na2SiO3aq/NaOHaq-ratios could significantly affect the strength development in AAGU mortars. The strength development in AAGU concrete depends on the NaOHaq concentration (NC). X-ray diffractogram (XRD), Fourier-transform infrared (FTIR) spectra, and scanning-electron-microscope coupled with energy-dispersive-spectroscopy (SEM + EDS) showed that strong alkali (10 M-NaOHaq) influenced the microstructural-density, reduced carbonation and improved binder amorphousity than the mild alkali (4 M-NaOHaq).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 66, 15 September 2014, Pages 541-548
نویسندگان
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