کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1456072 1509744 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel kind of concrete superplasticizer based on lignite graft copolymers
ترجمه فارسی عنوان
نوع جدیدی از فوق پلاستی کننده بتن بر اساس کوپلیمرهای پیوند لجن
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی

A novel superplasticizer was synthesized by grafting 2-acrylamido-2-tert.butyl sulfonic acid (ATBS) and acrylic acid (AA) monomers onto a lignite backbone using free radical copolymerization technique. Different molar ratios of ATBS:acrylic acid were tested to investigate the influence of the acrylic acid content on the dispersing performance of the graft copolymer. The synthesized polymers were characterized relative to their molecular properties and their dispersing performance in cement. It was found that especially the graft copolymer with an ATBS:acrylic acid molar ratio of 1:0.15 exhibits high dispersing force, long slump retention, high sulfate tolerance and only minor cement retardation. The polymer is more effective than industrial grade BNS. Successful grafting of the monomers was confirmed by size exclusion chromatography and measurement of the adsorbed layer thicknesses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 79, January 2016, Pages 123–130
نویسندگان
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