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Article
Development of Construction Material Waste Management System
تطوير نظام لإدارة نفايات المواد الإنشائية

Authors: Zeyad S. M. Khaled --- Basil S. Alshathr --- Ali Hasan Hadi
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2015 Volume: 33 Issue: 7 Part (A) Engineering Pages: 1715-1730
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Construction materials waste management is the process of implementing a strategy that is capable to reduce construction materials waste to the minimum. This research aims at developing a construction materials waste management system that can serve construction projects at the local construction industry in Iraq in minimizing waste at the execution phase and raising the interest in waste minimization by all participants. Results of a previous research held by the same authors are employed in the developed system as warning thresholds. The system is employed and tested in six under construction projects in Karbala then evaluated by five principal staff members in each project through a questionnaire form. The system proves to be easy to install, data input is smooth, output is reliable, interaction between the user and the system is efficient, results are accurate, integration between the developed system and MS-project is effective, storage management is productive, early warning of waste excess is active, role of the system in reducing the waste is fruitful, and employing the system in the local construction industry is possible.

إن إدارة نفايات المواد الإنشائية هي عملية تطبيق إستراتيجية مقتدرة على تقليل الهدر في المواد الإنشائية الى أقل حدٍ ممكن. يهدف هذا البحث الى تطوير نظام لإدارة نفايات المواد الإنشائية بإمكانهِ خدمة مشاريع التشييد على المستوى المحلي في العراق لتقليل النفايات في طور التنفيذ وزيادة اهتمام المعنيين بتقليل الهدر. تم توظيف نتائج بحثٍ سابق لنفس الباحثين في تحديد حدود العتبة المستخدمة في النظام. تم تطبيق النظام في ستة مشاريع تحت التشييد في كربلاء ثم تقييمهِ من قبل خمسة من المعنيين الأساسيين في كل مشروع من خلال نموذج استبانة. وقد أثبت النظام إنهُ سهل التنصيب وسلس المدخلات ومخرجاتهِ معولنٌ عليها ويتفاعل بكفاءة مع المستخدم ونتائجه دقيقة وتكاملهُ فعال ببرنامج (MS-project) ونجاح إدارتهِ للخزين وإنذارهِ المبكر بتجاوز النفايات كان فعالآ كما كان دور النظام بتقليل الهدر مثمرآ وإن تطبيق النظام في صناعة التشييد المحلية أمرآ ممكنآ.


Article
Synthesis of Nano Crystalline Gamma Alumina from Waste Cans

Authors: Nada Sadoon Ahmedzeki --- Sattar Jalil Hussein --- Waqar Abdulwahid Abdulnabi
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2018 Volume: 19 Issue: 1 Pages: 45-49
Publisher: Baghdad University جامعة بغداد

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Abstract

In the present study waste aluminium cans were recycled and converted to produce alumina catalyst. These cans contain more than 98% aluminum oxide in their structure and were successfully synthesized to produce nano sized gamma alumina under mild conditions. A comprehensive study was carried out in order to examine the effect of several important parameters on maximum yield of alumina that can be produced. These parameters were reactants mole ratios (1.5, 1.5, 2, 3, 4 and 5), sodium hydroxide concentrations (10, 20, 30, 40, 50 and 55%) and weights of aluminum cans (2, 4, 6, 8 and 10 g). The compositions of alumina solution were determined by Atomic absorption spectroscopy (AAS); and maximum yield of alumina solution was 96.3% obtained at 2 mole ratios of reactants, 40% sodium hydroxide concentrations and 10g of aluminum cans respectively. Gamma alumina was acquired by hydrothermal treatment of alumina solution at pH 7 and calcination temperature of 550 ºC. The prepared catalyst was characterized by X-ray diffraction (XRD), N2 adsorption/ desorption isotherms, X-ray fluorescence (XRF) and atomic force microscopy (AFM). Results showed good crystallinity of alumina as described by XRD patterns, with surface area of 311.149 m2/g, 0.36 cm3/g pore volume, 5.248 nm pore size and particle size of 68.56 nm respectively.

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