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العنوان
Structural behavior of ultra-high-performance self compacted concrete Columns /
المؤلف
Abdallah, Kareem Saeed.
هيئة الاعداد
باحث / كريم سعيد عبدالله
مشرف / حسام الدين حسن احمد
مناقش / طه عوض الله السيد
مناقش / محمد اسامة رمضان
الموضوع
Columns.
تاريخ النشر
2023.
عدد الصفحات
193 P. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الهندسة المدنية والإنشائية
تاريخ الإجازة
6/9/2023
مكان الإجازة
جامعة بنها - كلية الهندسة بشبرا - الهندسة المدنية
الفهرس
Only 14 pages are availabe for public view

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Abstract

Nowadays, ultra-high performance self-compacted concrete (UHPSCC) is a
new type of concrete that has gained a lot of attention due to its superior compressivestrength and durability than normal concrete. in addition to overcome the cost ofpreparation of UHPC and reduce the environmental pollution, this study used recycled
glass (GP) and lime (LP) powder as cement replacement materials in production of
the UHPSCC.
The flowability, mechanical and durability properties of UHPSCC mixes were
investigated and structural performance of UHPSC columns with a typical cross
section of 150×150 x1200 mm reinforced longitudinally and transversely with steel
and basalt fiber reinforced polymer (BFRP) bars under were tested under axial
monotonic loading. the influence of the type of the reinforcement (steel and basalt)and the volumetric ratio and spacing of the transverse reinforcement on the
performance of the specimens were investigated. Also, a non-linear finite element
analysis (NLFEA) using ANSYS Software ver. 14.5 was carried out to verify the
behavior of UHPSC-BFRC reinforced concrete columns under centric loads.
The fresh test results showed that the incorporation of GP and LP partially replaced
of cement improved the flowability of UHPSCC. The compressive, tensile, and
flexural strength were improved by increasing GP content to 20% replacement of
cement by weight with maximum increase of 6.25% ,14.7% and 26.7% respectively
at normal curing compared to the control mix. Also, use of these industrial wastes
improved the durability properties which the mix UHPSCC 7 showed better values of
water absorption and sorptivtiy with decrease level of 36.9% and 12.2% respectively
compared to the control mix.
Keywords: ultra-high-performance concrete, Basalt fiber reinforced polymer,
limestone powder, glass powder.