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Article
STUDY OF THE MECHANICAL PROPERTIES FOR UNSATURATED POLYESTER REINFORCED BY NATURAL FIBERS

Authors: Bushra H. Musa --- Rafah A. Nassif --- Enass M. Hadi
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2010 Volume: 13 Issue: 3 Pages: 65-68
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Banana fiber at present is a waste product of banana cultivation. Moreover, without anyadditional cost input.This study was carried out to investigate the effect of pseudo-stem banana fibers in the wovenfabric configuration on the mechanical properties of unsaturated polyester composite. It was foundthat the addition of pseudo- stem banana woven fabric increased in the impact, compression, andflexural strength. The results showed that the impact strength on the pseudo- stem banana wovenfabric reinforced (UP) composite is increased by 22% compared to virgin (UP), while flexural andcompression strength on the composite is increased by 15% and 12% respectively.

ألياف الموز المستعملة هي نفايات زراعية لنخيل الموزوبدون اي اضافات. تم اجراء هذه الدراسة لبحث تأثيرحصيرة الياف الموز على الخصائص الميكانيكية للبولياستر غير المشبع حيث وجد ان اضافة حصيرة الموزللبولي استر يؤدي الى زيادة متانة الصدمة والانضغاطيةومتانة الانحناء. واوضحت النتائج بان زيادة متانة الصدمةللمادة المتراكبة كانت بحدود 20 % بينما كانت الزيادة فيمتانة الانحناء والانضغاطية بحدود 15 % و 12 % علىالتوالي للمادة المتراكبة مقارنة مع البولي استر النقي.


Article
Improvement of the Iraqi Bauxite Refractory Bricks Properties by Adding Micro and Nano Zirconia

Authors: Enass M. Hadi Al-Amery --- Mahasin F. Hadi Al-Kadhemy
Journal: Journal of College of Education مجلة كلية التربية ISSN: 18120380 Year: 2015 Issue: 3 Pages: 45-62
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In this study;physical,mechanical and thermal test were carried out for the Iraqi bauxite,Two types of additives were used. Iraqi white kaolin as a binding material in ratio 10%, and zirconia (micro or Nano) as additives in ratios of (5, 10, 15, 20)% for the purpose of improving the general characteristics of the Iraqi bauxite refractory bricks.The samples were formed by semi-dry pressing,with added potassium silicate in ratio 10% as binder material.The formed samples were drying at(110)̊C for 24h then firing at (1400)˚C with soking time 2h.Linear shrinkage,Apparent density,Porosity and water absorption,Bending strength,Compressive and diametrical strength, Moh̊s hardness test,Thermal conductivity,Specific heat capacity and(XRD) analysis for raw material and bricks test were carried out,All mechanical and thermal properties were improved by adding micro and Nano zirconia ,The bricks which has Nano zirconia shown the best result.

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