کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1454708 1509688 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reaction products and strength development of wastepaper sludge ash and the influence of alkalis
ترجمه فارسی عنوان
محصولات واکنش و توسعه قدرت خاکستر لجن کاغذی و تاثیر قلیایی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی

Wastepaper sludge ash (WSA) from a newsprint paper mill was investigated for its mineralogical composition and its reaction products and strength development after activation with water and sodium and potassium hydroxide solutions. The results showed the WSA to consist of calcite, free lime, gehlenite, tricalcium aluminate, belite, talc, quartz and probably a glassy phase. The principle reaction product was monocarboaluminate (CO3–AFm) for the water- as well as for the alkali-activated WSA. Formation of monocarboaluminate and strength gain was more rapid for the alkali-activated WSA until 1 day of curing. However, afterwards reactions proceeded much slower when alkali solutions were used, leading to an about twice as high compressive strength for water-activated WSA mortars after 28 days of curing. The observed behavior is tentatively ascribed to a less uniform microstructure of the alkali-activated WSA. Significant differences between NaOH- and the KOH-activated WSA were not observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 45, January 2014, Pages 82–88
نویسندگان
, , , ,