کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4912609 1428748 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation on the consumption and performance of polycarboxylates in cement-based materials
ترجمه فارسی عنوان
ارزیابی مصرف و عملکرد پلی کربوکسیلات در مواد سیمان
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


- The absorption and coprecipitation of 6 PCE polymers are investigated.
- Their absorbed consumption and consequent flow of superplasticized cement pastes show time dependence.
- A relation between the PCE consumption and the yield stress of the superplasticized cement pastes can be finally obtained.

The addition of polycarboxylate based surfactants cause particles dispersion in cementitious materials and enhances their fluidity. The polymeric structures of the polycarboxylates have been formulated to meet various performance requirements such as water-reducing and consistency-maintaining. A trend on the relation between the polymeric structures and the resultant performance certainly exists, but its modeling is hardly obtained due to uncertainty on the polymeric structures as well as cement compositions. The degree of adsorption of the a polycarboxylate on cement particles is then taken to describe its performance. The rheological properties of plasticized cement pastes were evaluated and discussed to quantitatively analyze the effect of the adsorption of various polycarboxylates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 158, 15 January 2018, Pages 423-431
نویسندگان
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