استخدام المواد المركبة في التطبيقات الصناعية نمى بشكل سريع وذلك لمميزاته المناسبة التي تشمل ارتفاع نسب المقاومة والمتانة بالنسبة للوزن , وقد أصبحت المواد المركبة بديل المواد المعدنية في العديد من التطبيقات. المواد الثيرموبلاستيكية المركبة تم دراستها في هذه الرسالة حيث استعمل البولي اثيلين كقالب ودعم بإضافة ألياف الزجاج بنسب مختلفة ( 10% , 20% , 30% ) , وتم دراسة تأثير إضافة ألياف الزجاج على الخواص الميكانيكية للعينات. تم الحصول على العينات المركبة باستخدام جهاز البثق وإجراء التجارب لتقيم جريان المنصهر عند درجات الحرارة العالية حيث لاحظنا زيادة الجريان بزيادة الضغط . كما تم تطوير علاقات رياضية لتمثيل علاقات الإجهاد – الانفعال للعينات المركبة المتحصل عليها ,تم الحصول على ثوابت هذه العلاقات الرياضية. كما تم دراسة علاقات زمن الانهيارات للعينات المركبة , وتم تحسين طاقة الكسر للمواد المركبة التي تؤخر من ظاهرة الانهيار. إضافة ألياف الزجاج أدى إلى زيادة زمن الانهيار وتقليل طاقة الكسر. Abstract The use of composite materials in industry applications has grown rapidly, owing to their favorable characteristics, including high strength and stiffness to weight ratios, composite materials have been considered replacement of metals in numerous structural applications.Thermoplastic composite was studied in this thesis where high density polyethylene is used as a matrix and reinforced with different percentages of fiber glass ranging from (10%, 20%, 30%). The influence of addition of fibreglass on mechanical and thermal properties was studied. A pilot plant extruder is used to prepare the needed samples, where experimental investigation is carried out to evaluate the melt flow and the impact behaviour of the melt mixture at high temperature in the extruder. The flow rate increased by increased pressure. A mathematical correlation was developed to represent the stress – strain correlations of the composites used in this work. The combined model would be able to predict the creep, relaxation and recovery of composite materials, the constants of the model was obtained in area where the retardation effect is dominating. Time to failure correlation with stress was studied for the prepared composite material and mathematical correlation is established. The energy absorbed at fracture is improved for the composite material leading to a considerable delay in failure phenomenon. When added fibreglass led to increase time to failure and decrease energy of fracture.
ابتسام خليفة ابولجام (2008)

Abstract Cement kiln dust is a major by product in cement manufacture. Methods of disposal, handling, treatment and reuses are a major factors in optimization of a certain cement plant. This thesis concentrates on the uses of cement kiln dust of souk Al Kamees cement plant as Soil amendment and as an adsorpent of Fe, Zn and lead results from sand. The major objectives of these treatments are environmental rather than economical to reduce the landfill disposal of CKD which is major problem in cement industry. CKD is used in agricultural soil amendment.CKD in Souk Alkamees consists primarily of calcium carbonate and silence dioxide, the alkaline by pass process contains highest amount of calcium oxide and lowest loss on ignation [LOI] which become a beneficial for CKD use as a soil amendment to the sand for many especial agricultural products such as potatoes, …etc. This thesis concentrates on the uses of CKD as an adsorbent to remove heavy metals such as Fe, Zn, and Pb from soil. Adsorption column is used to perform the work. Experimental setup discussed in the thesis is used using cement kiln dust as an adsorbent for removal of heavy metals from soil. The major result is to simulate the physical behavior of the process using conventional isotherms available in literature, Langmuir, Freandlish and Drachsal isotherm models have been found to simulate the data with good agreement with experimental work. Characterization of the CKD is made after dehydration process at 150C for 24 hrs. X ray fluorescent equipment is used and the results are reported in the thesis.
محمد محمود الشاهري (2015)

Abstract 1. The experimental viscosities densities measured with Anton Paar SVM 3000 equipment, and refractive indices measured with Refractive Meter equipment, corresponding values of excess molar volumes (VE ), deviations in viscosity (Δμ), deviations in refractive index (ΔnD), excess Gibbs energy (GE), and excess molar enthalpy (HE), for binary, ternary and fourth mixtures of alcohol, ether, and n-alkanes. 2.Used for the calibration experimental from paper [7] were the mixture for the binary system (tert butyl alcohol + ethanol ), we had good result and ADD% for densities, viscosities and refractive indices were 0.1657 %, 0.4846 %, and 0.033545 % respectively. 3.Data of binary mixture were fitted to a Redlich-Kister's The choice of the proper number of coefficients (p), was based on the standard deviations, and the F-test as criterion of goodness with an error lower that 1% see. 4.Data of ternary and fourth mixture were correlated by Cibulka equation were determined with the optimization algorithm similar to that for the binary parameters the σ values was less than 0.05%. 5.The experimental viscosities densities and refractive indices were positive and decrease with increase temperature for all tables for binary ternary and fourth mixtures. 6.Excess molar volumes (VE), was negative value for all binary system, Deviations in viscosity (∆µ), negative value, but at system (n-hexane + n-heptane), maximum positive and minimum with negative value, Deviations in Refractive Index (ΔnD), was were positive for all binary mixtures, Excess Gibbs Energy was negative for all binary ,but maximum positive and minimum with negative value just at system (n-hexane + n-heptane). 7.Excess properties for ternary mixture negative and positive value. 8.Excess properties for fourth mixture negative value.
سهير المبروك دربال (2009)