کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4918091 1428751 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of comb-shaped superplasticizers with different charge characteristics on the microstructure and properties of fresh cement pastes
ترجمه فارسی عنوان
اثرات فوق العاده اشعه ماوراء بنفش با ویژگی های مختلف شارژ بر ریزساختار و خواص سیمان تازه سیمان
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The impacts of polycarboxylate co-polymers with varied charge characteristics on the microstructure and properties of fresh cement pastes (FCPs) were investigated. Measurements of adsorption of polymers on cement, cement hydration, microstructure, rheological and viscoelastic properties of FCPs were performed to characterize the performance of the co-polymers. Results show that the effects of the co-polymers on the microstructure and properties of FCPs are determined by their charge characteristics, in the order of COO− > SO3− > N+. Polymers with more carboxylate groups exhibit stronger dispersing capability due to their stronger adsorption capability and retardation effects, thereby bringing about superior dispersion of cement particles, lower viscosity and elasticity of FCPs. The dispersing capability and fluidizing efficiency of the co-polymers with cationic charges are evidently lower than those with negative charges, so are their impacts on the microstructure and properties of FCPs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 155, 30 November 2017, Pages 441-450
نویسندگان
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