کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6724801 | 503609 | 2013 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Visualizing and simulating flow conditions in concrete form filling using pigments
ترجمه فارسی عنوان
تجسم و شبیه سازی شرایط جریان در فرم بتن پر کردن با استفاده از رنگدانه ها
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Flow variation at surfaces and reinforcement during form filling was visualized with grey and black SCC. The border between grey and black (pigmented) SCC was captured as frozen images on hardened sawn- and formwork surfaces in a flow box experiment. Maximum velocity occurred at the centre of the closed box, and lowest velocity near the formwork, particularly with reinforcement parallel to formwork. Smooth formwork gave shorter flow profiles (higher surface velocity) than rough formwork. The pigmented mixes had similar workability though somewhat increased yield stress. Flow pattern depended on mix rheology, surface roughness and reinforcement: one mix showed plug flow between reinforcement and smooth vertical formwork whereas most mixes mainly had sheared flow. Numerical simulations mostly agreed with observed flow profiles and could be used to model flow at varying formwork surface roughness with a slip velocity. Future investigations should study the conditions causing plug- and wavetype flow, lubrication and surface finish.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 49, December 2013, Pages 328-342
Journal: Construction and Building Materials - Volume 49, December 2013, Pages 328-342
نویسندگان
Stefan Jacobsen, Rolands Cepuritis, Ya Peng, Mette R. Geiker, Jon Spangenberg,