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دراسة إمكانية استخدام الرماد مع الغضار في تصنيع السيراميك

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 Publication date 2011
and research's language is العربية
 Created by Shamra Editor




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References used
ASTM C373-88, Standard Test Method for Water Absorption, Bulk Density, Apparent Porosity, and Apparent Specific Gravity of Fired Whiteware Products
ASTM C1327-03, Standard test method for Vicker Indentaion Hardness of Advanced Ceramic
Burst, J.F., 1991. The application of clay minerals in ceramics. Applied Clay Science 5 (5–6), 421–443
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The research includes an experimental study for the manufacture of composite material based on polymer ( unsaturated polyster) reinforced with wool fiber at different weight fractions ( 0.5 % - 1% - 2%- 3% - 4%- 5 % ) and then it has been studied some mechanical properties
Asphalt concrete is used in the surface layer of road paving and is widely used around the world. Asphalt concrete consists of coarse aggregate , fine aggregate, filler and asphalt binder. Fly ash FA is one of the main wastes of coal-fired thermal and coal-fired power plants and is available in large quantities and has no use. The aim of this study is to evaluate the possibility of using fly ash as a filler material in hot asphalt mixtures and to use it as an alternative to natural fillers by performing laboratory work in which the asphalt mixture is designed and the optimal ratio of asphalt is determined . Then replace the filler material with 0, 25, 50, 75 and 100% with fly ash . The results showed that Marshall's stability values increased with increased replacement ratio and observed that Marshall's hardness values were decreased while remaining within the tolerable limits of the specifications. The study concluded that fly ash can be used as a filler in asphalt mixtures.
The majority of known polymer materials are electrically insulating. But there are some of polymers are intrinsically conducting in nature, However, it is lacking in process ability, and the scope for manipulation of electrical and mechanical prop erties is limited. The method which used to solve this problem is an addition of a conductive metal filament into a polymer filament yarn. Which can be directly integrated into a textile, or can be knitted. So we made a device able to produce this kind of conductive yarns which depends on melt spinning technique but with the elimination of necessary pressure for extrusion. And we were able to produce samples of copper filament coated with polymeric material (low density polyethylene).
In this study we used electro spinning technology to obtain nonwoven webs of Nano fibers of poly vinyl alcohol and Nano particles of silver . we dissolve the polymer poly vinyl alcohol in it's solvent (water) to form a polymeric solution that we c harged it by positive charge and ejected it to leaving it on a collector that we charged it by negative charge and used a high voltage. and we mixed the polymer poly vinyl alcohol with silver nitrate with different concentrations and electro spinning the mixture to obtain Nano fibers and Nano particles of silver then we applied heat treatment for the whole samples at 155°c for 5 minutes for tow aims the first one is to make crosslinking between series of PVA and the second is for the stability of silver nanoparticles , finally we analyze samples on Scanning Electron Microscopy SEM .
توجهت أنظار الباحثيين في مجال التغذية نحو تخفيض الكربوهيدرات في المنتجات المصنعة بهدف التقليل من اثار تراكم الدهون الناتجة عن تخزين الجسم لهذه الكربوهيدرات
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