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Article
Angle of friction in Reinforced Earth
قياس زاوية الاحتكاك للتربة المسلحة

Authors: Awf A. Al-Kaisi --- Zeena W. Abbawi
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2005 Volume: 24 Issue: 5 Pages: 499-506
Publisher: University of Technology الجامعة التكنولوجية

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Article
Assessment of Bearing Capacity of Subbase Contaminated with Kerosene
تقيم قا بلية التحمل تحت الأساس الملوثة بالكيروسين

Authors: Zeena W.Abbawi --- Kawther Y.Al-Soudany --- Makki K.Al-Recaby
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2013 Volume: 31 Issue: 19 Part (A) Engineering Pages: 159-172
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The present paper is focused towards evaluation bearing capacity of subbase layer which is contaminated with Kerosene. Seven series of model tests were performed using steel container (500*300*300mm). The bed of subbase was compacted in three layers inside the container; each layer was 100mm in depth. Circular footing 65mm in diameter resting on the bed of subbase were loaded incrementally up to failure. Different percentages of Kerosene (0%, 5%, 12% and 20%) were added, the first series consists of uncontaminated soil layer, the second series covers the model tests with added (5%, 12% and 20%) to the top subbase layer and third series covers the model tests with added (5%, 10% and 20%) to the top and second subbase layers. Each percentage was added separately. The results showed increase in ultimate bearing capacity; with increasing of Kerosene content up to 5% then a decrease with further increase of Kerosene content.

البحث الحالي مركز باتجاه حساب قا بلية التحمل لطبقة تحت الأساس الملوثة بمادة الكيروسين. تم اجراء سبعة موديلات باستخدام موديل حديدي بابعاد (*500*300* 300ملم). طبقة تحت الأساس رصت بثلاث طبقات داخل الموديل وكل طبقة بسمك 100 ملم. تم تحميل طبقة تحت الأساس باستخدام اساس دائري بقطر 65 ملم بزيادة متساوية بالحمل وصولا الى الفشل . اضيف الكيروسين بنسب مختلفة (0%,5%,12 %,20%). المجموعة الأولى تتالف من طبقة تحت الأساس غير ملوثة , المجموعة الثانية غطت الموديلات الملوثة بكيروسين بنسب (5%,12 %,20%) مضافة الى الطبقة العلوية من تحت الأساس و المجموعة الثالثة غطت الموديلات الملوثة بكيروسين بنسب (5%,12 %,20%) مضافة الى الطبقة العلوية والثانية من تحت الأساس . واضيفت كل نسبة على حده لكل نموذج.


Article
Behavior of Axially Loaded Reactive Powder Concrete Columns
سلوك الاعمدة المصنوعة من خرسانة المساحيق الفعالة والمحملة محوريا

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Abstract

In this research the behavior of reactive powder concrete short (RPC) columns with and without reinforcement was reported. Eight specimens of RPC short columns with reinforcing steel and without reinforcing steel are examined and compared with eight specimens of high strength reinforced concrete (HSC) short columns. The columns samples are divided into two groups. The dimensions of the first group are (100 *100* 400) mm and the dimensions of the second group are (70*70*400) mm. The lateral reinforcing steel, which are used in the reinforced concrete short columns, that are tied or spirally reinforced. Experimental data for strength, lateral and axial deformation, ductility and the failure mode were obtained for each test. The failure load of RPC short columns without reinforcing steel is more than the failure load of RPC short columns with reinforcing steel by about 1.222 time for the two groups. The failure mode of RPC short columns without reinforcing steel is shear failure, while the failure mode of RPC short columns with reinforcing steel is rupture of some ties. The carrying capacity of RPC columns with and without reinforcing steel as compared to corresponding HSC columns is about 3.6 and 4.4 times respectively

Concentric load, Ductility, High strength concrete, Reactive powder concrete, Short columns.

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