Materials Science and Engineering Commons^™

Assessment Of Carbon Dioxide Emission And Its Impact On High-Rise Mixed-Use Buildings In Egypt, Ahmed Salah Hamza

Theses and Dissertations

With Egypt's vision of 2030 focusing on sustainable development with a true emphasis on Carbon Dioxide (CO₂) emission reduction in the newly built cities and high-rise buildings, efforts are exerted on various levels towards accomplishing the vision’s goals. This is achieved through multiple tools and models associated with aiding the reduction of carbon emissions, yet not a clear one was introduced for the mixed-use buildings in Egypt.

Through this work, a significant gap was identified with respect to high-rise buildings carbon emission assessment in Egypt. This was a main driving force for this work in an attempt to …

Nanoengineered Materials For Energy Conversion & Storage Applications: A Density Functional Theory Study, Ahmed Biby

Theses and Dissertations

The conventional approach for the development of novel materials has become long relative to the desired product development cycle. Thus, the sluggish pace of the development of materials within the conventional approach hinders the rapid transformation of the scientific outcomes into useful technological products. To this end, the field of hierarchical materials informatics evolved to bridge this gap. In this field, the multiscale material internal structure is considered the starting point and the core of this approach. This being said, the density functional theory (DFT) was used to generate useful materials data for the advancement of the hierarchical materials data-bases …

Mechanical And Structural Behavior Of As-Built And Post Treated Ti6al4v Lattice Structures Fabricated By Selective Laser Melting (Slm), Hala Ahmed Salem

Theses and Dissertations

Lattice structure is a type of cellular structures that is composed of repeatable unit cells, each of which is formed of interconnect network of struts. Lattices with different structures are gaining attention for their good mechanical properties for light weight applications. Selective laser melting (SLM), is one of the AM powder-bed fusion fabrication techniques. SLM is widely known for its capability for fabricating complex metallic structures such as lattice structures with high resolution. SLM process influence the microstructure and mechanical properties of fabricated parts. The used processing parameters influence the level of internal porosity within the fabricated parts which directly …

Experimental Investigation Of Natural Fiber Reinforced Composite, Irene Samy Fahim

Theses and Dissertations

There is a growing use of polymers in different applications worldwide. This phenomenon resulted in an enormous increase in the amount of plastic waste. These wastes have significant impacts on the environment including pollution and depletion of resources. Recycling plastic waste and reusing it helps in alleviating environmental degradation. The amount of recycled plastics all over the world not utilized is huge. U.S.A recycled 5.7% of the total plastics generated and Western Europe recycled 39% of total amount of plastics consumed [1]. This research studies the potential usage of virgin and recycled polymer reinforced with natural fiber such as rice …

Finite Element Model Updating Approach To Damage Identification In Beams, Mohamed Medhat Saada

Archived Theses and Dissertations

No abstract provided.

Investigating A Natural Organic Binder As A Bitumen Substitute In Flexible Pavements, Karim Ahmed Abdel Warith

Archived Theses and Dissertations

No abstract provided.

Powder Rolling Of Cnt-Reinforced Aluminum Strips, Mostafa Abdel-Fattah El-Borady

Archived Theses and Dissertations

Multi walled carbon nanotubes (MWCNT) were added to aluminum powder (99.97% pure) to produce a composite material. Three mixing techniques were examined

1 Low energy mixing: Using a Turbula mixer with two different speeds 48 and 67 rpm.

2 High energy mixing: Using a ball mill without adding any balls in the mixing jars with two speeds 300 and 400 rpm.

3 Ball milling: Using the ball mill (with steel balls) to mix higher CNT weight fraction samples for the electrical resistivity tests.

The mixtures were packed in copper cans and rolled in a rolling machine to compact the mixture; …

Parameters Influencing The Performance Of Reinforced Concrete-Fiber Reinforced Polymer Systems, Yosra Hesham Mohamed El Maghraby

Archived Theses and Dissertations

No abstract provided.

Abrasion Resistance Of Concrete Made With Various Types Of Aggregates, Mohamed Hamada Rashwan

Archived Theses and Dissertations

No abstract provided.

Bulk Behavior Of Nanostructured Aluminum: Nanocrystalline Powders Compaction, Canning And Consolidation Via Intense Plastic Straining, Mohamed Mahmoud Hamed Shamma

Archived Theses and Dissertations

No abstract provided.

Guidelines For The Application Of Recycled Concrete Aggregate In The Egyptian Construction Industry, Ahmed Moustafa Essam Aly Kamel

Archived Theses and Dissertations

Construction industry is one of the most important fractions of economy worldwide. This industry consumes enormous amounts of raw materials and produces considerable waste. The optimization of construction material usage not only saves costs but also can significantly contribute towards sustainable development. The concept of recycling the construction and demolition rubble is being addressed in this study as a solution. The recycling of concrete, resulting from both the construction activities and the demolition activities, in order to be used as a source of aggregate is being focused upon in this study. Although the idea of using recycled concrete has been …

Properties Of Light Transmitting Concrete, Dina Abdel Mohsen Abou Alia

Archived Theses and Dissertations

No abstract provided.

The Effect Of Cold Work On The Mechanical Behavior Of Niti Shape Memory Alloys, Mohamed Elwi Mitwally

Archived Theses and Dissertations

No abstract provided.

A Finite Element Material Model Applied To A1-Alloy Consolidates Processed Via Equal Channel Angular Extrusion, Khalil Ibrahim El Khodary

Archived Theses and Dissertations

No abstract provided.

Numerical Modeling Of Concrete Masonry Walls Strengthened By Fiber Reinforced Polymers Under Lateral Loads, Mohamed Salama

Archived Theses and Dissertations

The use of fiber reinforced polymers (FRP) for the seismic retrofit of masonry walls is on the rise. Design formulae are available to estimate the lateral load capacity of the strengthened walls. However, recent experimental data from tests conducted on full scale concrete masonry walls under cyclic lateral loads have shown that these design capacities have not been reached because of the occurrence of other failure modes not accounted for in the design formulae. The limiting failure mode in all test samples referred to in this work was due to premature compression failure of the masonry units at the wall …

Development Of Ferrocement U-Shaped Beams Infilled With Core Materials, Ahmed Mahdy Abdelnaby

Archived Theses and Dissertations

No abstract provided.

Applying Particle Swarm Optimization To Dynamic Lot Sizing With Batch Ordering, Ahmad Hassan Sayed Aly

Archived Theses and Dissertations

No abstract provided.

Ferrocement Sandwich And Hollow Core Panels For Floor And Wall Construction, Hassan Mohammed Gaafar

Archived Theses and Dissertations

No abstract provided.

Improved Compressed Earth Blocks, Tarek Mahmoud Ahmed Elgindy

Archived Theses and Dissertations

Bricks and blocks, being two of the most important building materials in our construction field, can be made out of different materials, most popular of which are earthen materials. Ancient civilizations used earthen materials as a cheap and easy way to make bricks from which they built their houses and shelters. Ancient Egyptians used "mud" (which is technically silt and clay) to make bricks which we call now adobe. These days, despite the low cost of adobe it is loosing grounds in the construction of housing because of its very low compressive strength and poor durability against weathering. Accordingly, cement …

Durability And Stability Of Briquetting From Solid Agricultural Wastes, Ishaq Oladapo Adeleke

Archived Theses and Dissertations

This study is concerned with the transformation of agricultural wastes into useful solid form of energy known as briquettes. Being agricultural in nature, Egypt disposes huge quantities in adhoc manner resulting in economic loss and adverse environmental consequences. This improved form of agricultural waste eases utilization and storage. Two major parameters -residue size and processing conditions- were investigated. Bagasse-mudcake mixture, cotton stalk, rice straw and com stalk are the residues studied for briquetting. Since stable and durable briquettes are important qualities density and strength of the formed briquettes are calculated as measures of stability and durability. The problem is too …

Assessment Of The Readiness Of Egyptian Companies To Implement Business Process Reengineering Programs, Hany Waguih Shoukry

Archived Theses and Dissertations

Business Process Reengineering (BPR) emerged as a performance improvement methodology in 1990. Its objective of radical process redesign to achieve dramatic performance improvements makes it a potential candidate to be applied in most Egyptian companies, especially in the Egyptian private sector that is struggling to upgrade its performance in the new global economy. Although the main problem of BPR is its high probability of failure, which is due to the failure of companies to fulfill all BPR prerequisites, very limited research exists on how to measure the readiness of a company to implement successful BPR programs. The current research addresses …

The Localized Corrosion Behavior Of 6% Mo And 316l Stainless Steels In Chloride Media And The Effect Of Applied Mechanical Stress, Houssam El-Din Sabry Ahmed

Archived Theses and Dissertations

Electrochemical techniques were applied to study the crevice corrosion resistance of two types of stainless steel alloys namely, conventional 316L and super austenitic 6% Mo in acidified 3% NaCl solution at room temperature. Potentiodynamic results showed that 6% Mo alloy possessed a remarkable resistance to crevice corrosion compared to 316L alloy when tested in the same solution. The breakdown potential at which passivity broke down for 316L alloy was 0.00 m V, SCE, the corresponding value for 6% Mo alloy could not be reached up to the potential value of 700 m V, SCE. 316L alloy suffered extremely from crevice …

Neural Networks For Estimating Concrete, Lokman M. Sharara

Archived Theses and Dissertations

No abstract provided.

Forecasting With Combined Seasonal Indiaces, Al-Nasser Essam Taki El Din

Archived Theses and Dissertations

No abstract provided.

Localized Corrosion Behaviour Of Molybdenum Bearing And Stabilized Stainless Steels In Saline Media, Hany Mohamed Sabry Ahmed

Archived Theses and Dissertations

No abstract provided.

Longitudinal Cracking Of Concrete Slab In Composite Beams, Talat Fawzi Abu-Amra

Archived Theses and Dissertations

No abstract provided.

Numerical Assessment Of The Effects Of Grout Characteristics On Settlement Measurements In Borehole Extensometers, Ahmed Abdel-Wahab Mohamed Bayoumi

Archived Theses and Dissertations

No abstract provided.

Impact Of Aggregate Fines On Short Term Properties Of Concrete Incorporating Water-Reducing Admixtures, Maged Maher Fakhry

Archived Theses and Dissertations

No abstract provided.

Experimental Investigation Of The Performance Of A Solar Crop Dryer, Sherif Nabil Abd

Archived Theses and Dissertations

No abstract provided.

Effect Of Temperature And Strain Rate On The Mechanical Behavior Of Al/Sic Particulates Metal Matrix Composites, Mohamed Mahmoud Zaki Emara

Archived Theses and Dissertations

No abstract provided.