کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7884638 1509714 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reduction of water content in calcium aluminate cement with/out phosphate modification for alternative cementation technique
ترجمه فارسی عنوان
کاهش میزان آب در سیمان آلومینات کلسیم با اصلاح فسفات با استفاده از روش سیمان سازی جایگزین
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
Cementation of the secondary aqueous wastes from TEPCO Fukushima Daiichi Nuclear Power Plant is challenging due to the significant strontium content and radioactivity, leading to a potential risk of hydrogen gas generation via radiolysis of water content. The present study investigates the reduction of water content in calcium aluminate cement (CAC) with/out phosphate modification by a heat-treatment during the solidification. The reduction of water in the CAC was found restricted by the rapid formation of crystalline hydration phases, whereas the phosphate-modified system allowed the gradual reduction of water, achieving the reduction of 60% water content at 95 °C. Curing at 60-95 °C also eliminated the significant cracks found at 35 °C in the phosphate system. The possible difference in the amorphous products, NaCaPO4∙nH2O type at 35 °C and Ca(HPO4)∙xH2O type at 60-95 °C, may have contributed to the improvement in the microstructure together with the change in the pore size distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 109, July 2018, Pages 243-253
نویسندگان
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