کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8947034 | 1645545 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Key parameters in optimizing fibres orientation and distribution for Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
This study addresses some key parameters in optimizing fibres distribution and orientation for Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). Based on a materials efficient application point of view, a densely compacted UHPFRC cementitious matrix is designed by using the modified A&A (Andreasen & Andersen) model. Several UHPFRCs with different viscosities are produced by adjusting the proportions of silica fume to metakaolin. Then, some key influence factors are considered and studied to clarify their effect on fibres distribution and directions in UHPFRC, including concrete casting length, casting height and mixture viscosity. At last, an image analysis tool is applied for further prove the fibres orientation and distribution in the hardened UHPFRC. The obtained experimental results indicate that the fibres orientation can be strongly affected by the UHPFRC casting length, casting height and the mixture viscosity. The optimized fibre orientation can be obtained when the UHPFRC with 1000â¯mm length, 150â¯mm cast length and 4.409â¯pa·s viscosity. Moreover, compared to the effect of casting length and mixture viscosity, the casting height is more important to produce a homogeneous UHPFRC with optimized fibre distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 188, 10 November 2018, Pages 17-27
Journal: Construction and Building Materials - Volume 188, 10 November 2018, Pages 17-27
نویسندگان
Qiulei Song, Rui Yu, Zhonghe Shui, Xinpeng Wang, Suduan Rao, Zewen Lin, Zhe Wang,