کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5437070 | 1509728 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rheology of hydrating cement paste: Crossover between two aging processes
ترجمه فارسی عنوان
رئولاسیون رطوبت سیمان: متقاطع بین دو فرایند پیری
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کلمات کلیدی
رب سیمان، هیدراتاسیون، رئوئولوژی، ریز ساختار، سالخورده،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
The roles of applied strain and temperature on the hydration dynamics of cement paste are uncovered in the present study. We find that the system hardens over time through two different aging processes. The first process dominates the initial period of hydration and is characterized by the shear stress Ï varying sub-linearly with the strain-rate γÌ; during this process the system is in a relatively low-density state and the inter-particle interactions are dominated by hydrodynamic lubrication. At a later stage of hydration the system evolves to a high-density state where the interactions become frictional, and Ï varies super-linearly with γÌ; this is identified as the second process. An instability, indicated by a drop in Ï, that is non-monotonic with Î³Ì and can be tuned by temperature, separates the two processes. Both from rheology and microscopy studies we establish that the observed instability is related to fracture mechanics of space-filling structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 95, May 2017, Pages 226-231
Journal: Cement and Concrete Research - Volume 95, May 2017, Pages 226-231
نویسندگان
Atul Varshney, Smita Gohil, B.A. Chalke, R.D. Bapat, S. Mazumder, S. Bhattacharya, Shankar Ghosh,