Design And Development Of An Inert Controlled Environmental Chamber For Evaluation Of Contaminant Mass Transfer,
2024
Purdue University
Design And Development Of An Inert Controlled Environmental Chamber For Evaluation Of Contaminant Mass Transfer, Brian Magnuson, Zachary Limaye
The Journal of Purdue Undergraduate Research
No abstract provided.
Use Of Hybrid Fibers And Shrinkage Mitigating Materials In Scc For Repair Applications,
2024
Missouri University of Science and Technology
Use Of Hybrid Fibers And Shrinkage Mitigating Materials In Scc For Repair Applications, Kamran Aghaee, Kamal H. Khayat
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Self-consolidating concrete (SCC) is used to repair structural elements with congested reinforcement or restricted access to placement and consolidation. In addition to adequate flowability, passing ability, filling capacity, and stability, adequate bonding to the substrate and reinforcing bars, low shrinkage and cracking resistance are required for successful repair. This study employs various shrinkage mitigating materials, including expansive agent (EA), coupled use of EA with shrinkage reducing admixture (SRA), and EA with pre-saturated lightweight sand (LWS) to fulfill these requirements. The effect of these materials on the performance of SCC made with a hybrid synthetic (PP) fiber and a hybrid steel-synthetic …
Integrated Project Delivery (Ipd): A Contractual Framework For The Egyptian Construction Industry,
2024
American University in Cairo
Integrated Project Delivery (Ipd): A Contractual Framework For The Egyptian Construction Industry, Sarah Hussain
Theses and Dissertations
This abstract highlight the significant findings and contributions of the study, which aimed to develop model clauses specifically tailored to the Egyptian construction industry for multi-party construction contracts. The research methodology encompassed several key components. Firstly, a comprehensive literature review was conducted to explore the various construction delivery methods prevalent in Egypt. This review provided a solid foundation for understanding the existing practices and identifying areas for improvement. The study also delved into the concept of Integrated Project Delivery (IPD) and its potential benefits as well as an analysis of the commonly used standard forms of contract and successful case …
Assessment Framework For Bim-Digital Twin Readiness In The Construction Industry,
2024
Department Architecture and Building Sciences, College of Architecture & Planning, King Saud University, Riyadh 11574, Saudi Arabia
Assessment Framework For Bim-Digital Twin Readiness In The Construction Industry, Aljawharah A. Alnaser, Ali Hassan Ali, Haytham H. Elmousalami, Ahmed Elyamany, Ahmed Gouda Mohamed
Civil Engineering
No abstract provided.
Research On An Improved Cotton Cleaner Unit,
2024
Termiz State University
Research On An Improved Cotton Cleaner Unit, Muzaffar Djurayev, Sherqul Hakimov, Ilhom Abbazov, Rashid Kaldybaev
Technical science and innovation
This article analyzes the results of changes to the working parts of a cotton cleaning unit from small and large impurities. It is known that the UXK installation uses continuous cleaning technology, that is, the cotton entering the purifier is cleaned in all its cleaning sections and then transferred to another process. In these sections, pieces of cotton wool from the separated waste are regenerated in a separate drum. Existing purifier suppliers use a manually operated mechanical system to monitor its performance. These factors do not make it possible to control the cleaning process when the quality indicators of cotton …
Performance Of Finned Pile Under Torsional Load In Sand,
2024
Tanta University - Faculty of Engineering
Performance Of Finned Pile Under Torsional Load In Sand, Aalaa Khater, Ahmad Nasr Prof, Waseim Azzam Prof
Journal of Engineering Research
The pile foundations can experience torsional loads from earthquakes, wind, waves, offshore wind turbines, electrical transmission towers, and ship collisions in the maritime environment. Additionally, the axial load from the supporting superstructures can also cause torsional loads. This paper presents a new approach to pile modification called the finned pile. To enhance the torsional capacity of a single pile in the sand (where sand was used in a state of medium density Dr=50%), with or without fins, a number of experimental tests were conducted to investigate the effects of torsional loads (T), these studies involved varying the length, width, shape, …
Pestel And 3r Waste Management Model For Construction Companies Operating In Central Tanta: A Comprehensive Construction And Demolition Waste Management Model,
2024
Tanta University
Pestel And 3r Waste Management Model For Construction Companies Operating In Central Tanta: A Comprehensive Construction And Demolition Waste Management Model, Moaaz Ali Bastaweesy, Mahmoud Ahmed Zaki, Marwa Ahmed Kamer Eldawla
Journal of Engineering Research
Due to a recent economic boom, Tanta's construction sector has seen fast expansion, which has resulted in high construction and demolition waste (C&DW) creation and waste management operations that lag below international best practices. The current study uses PESTEL analysis, a thorough environmental screening method, to first identify and evaluate significant external and internal elements that may have an impact on C&DW management in a top Central Egyptian construction business. Then, this firm is the topic of a case study that applies the 3R (reduce-reuse- recycle) principles. The offered context-specific current international practices, the described current firm practices, and the …
Modeling Of Equilibrium Shoreline Of Headland Bay Beaches,
2024
Irrigation and Hydraulics Engineering Department, Civil Engineering Department, Faculty of Engineering, Tanta University, Egypt
Modeling Of Equilibrium Shoreline Of Headland Bay Beaches, Mohamed Ahmed Elmarakby, Ahmed Elshinnawy, Bakenaz A. Zeidan
Journal of Engineering Research
Engineering tools for predicting a long-term reaction of beaches include equilibrium beach formulations. They are used to assess how human interference (protection works, breakwaters, ports etc.) has affected the shoreline reaction since they Specify the final orientation of a beach on a time scale of years. One of the equations for determining the Static Equilibrium Planform (SEP) of Headland Bay Beaches (HBBs) that can be found in the literature is the Parabolic Bay Shape Equation (PBSE). The placement of the down-coast control point (Po), which is the down drift limit from which the PBSE is applied, has a …
Ground Settlements Due To Quad Water Tunnel Construction,
2024
Prof. of Geotechnical Engineering, Faculty of Engineering, Tanta University, Egypt
Ground Settlements Due To Quad Water Tunnel Construction, Marawan M. Shahien M. Shahein, Ehab Ahmed Khalil E.Khalil, Ahmed F. Abd El Kader A. Abd El Kader, Mahmoud Abdulnasser Hodeab M.A.Nasser
Journal of Engineering Research
Construction of a tunnel under an existing one poses significant geotechnical challenges due to the potential surface and subsurface settlements caused by the new tunnel construction and its impact on the existing tunnel, adjacent buildings, and facilities. The complexity intensifies when multiple adjacent tunnels need to be constructed, such as twin, triplet, quad, or more, as the construction of each tunnel affects the others. This interaction depends on various factors, including the horizontal distance between each tunnel (pillar width), the tunnel's depth and vertical position relative to the existing tunnel (pillar depth), and their influence on surface and subsurface settlement …
Modeling Of Nearshore Wave Transformations Behind Submerged Breakwaters,
2024
postgraduate student
Modeling Of Nearshore Wave Transformations Behind Submerged Breakwaters, Mona Mahmoud Abdelay, Ibrahim Mohamed Rashwan, Ahmed Shalby, Hewida Mohamed Omara
Journal of Engineering Research
Breakwaters can generally be divided into three categories based on where the sea level is: submerged breakwater, emerged breakwater, and lower limit breakwater. Nearshore barriers with an underwater structure called submerged breakwaters are used to dissipate the force of wave strikes and safeguard the shoreline. The wave transmission coefficient value can be used to assess submerged breakwaters' contribution to the wave energy decrease. In the past mathematical and physical models were used to understand how the submerged breakwater affects incoming wave energy, hydrodynamic processes, and morphological changes. In the present study, the MIKE21 SW software as the numerical model was …
Exemplary Studies On The Torsional Response Of Single Pile In Contaminated Sand,
2024
Faculty of Engineering, Tanta University, Egypt
Exemplary Studies On The Torsional Response Of Single Pile In Contaminated Sand, Ahmed Nasr, Waseim Azzam, Nada Ramadan
Journal of Engineering Research
Deep foundations, including piles, are employed in types of coastal soil because the soil in such regions may be subjected to several variables that alter the engineering features of the soil, like oil contamination. Together with the loads caused by supported superstructures, the pile foundations may also be susceptible to torsional loads from eccentric, horizontal loads brought on by winds, earthquakes, ship accidents, and waves. Tests have been conducted in this laboratory investigation to examine the behavior of piles under torsional load (T) in polluted sandy soil. Also, tests investigated how the Lp/Dp ratio affected the piles' bearing capacity. Details …
The Ecological Responses To Hydroperiod Of Wetland Plant Species Determined By Manipulated Soil Surface Elevation (Marsh Organs),
2024
Louisiana State University
The Ecological Responses To Hydroperiod Of Wetland Plant Species Determined By Manipulated Soil Surface Elevation (Marsh Organs), Brandon Wolff
LSU Master's Theses
As sea level rise, subsidence, and abandonment of natural deltaic processes due to a highly engineered Mississippi River continue to threaten Louisiana’s coastal wetlands, the need for a system-wide understanding of natural wetland land-building and preservation processes has never been greater. A key component of any wetland is the ever-changing water environment that periodically floods and dries the marsh platforms. The flooding depth, duration, and frequency, known as the hydroperiod, along with salinity and soil fertility are key determining factors of vegetation and marsh types at a particular location. Different types of vegetation will have different growth characteristics such as …
Suitability Of The Height Above Nearest Drainage (Hand) Model For Flood Inundation Mapping In Data-Scarce Regions: A Comparative Analysis With Hydrodynamic Models,
2024
School of Engineering
Suitability Of The Height Above Nearest Drainage (Hand) Model For Flood Inundation Mapping In Data-Scarce Regions: A Comparative Analysis With Hydrodynamic Models, Navin Tony Thalakkottukara, Jobin Thomas, Melanie Watkins, Benjamin C. Holland, Thomas Oommen, Himanshu Grover
Michigan Tech Publications, Part 2
Unprecedented floods from extreme rainfall events worldwide emphasize the need for flood inundation mapping for floodplain management and risk reduction. Access to flood inundation maps and risk evaluation tools remains challenging in most parts of the world, particularly in rural regions, leading to decreased flood resilience. The use of hydraulic and hydrodynamic models in rural areas has been hindered by excessive data and computational requirements. In this study, we mapped the flood inundation in Huron Creek watershed, Michigan, USA for an extreme rainfall event (1000-year return period) that occurred in 2018 (Father’s Day Flood) using the Height Above Nearest Drainage …
Mathematical Modeling Of Fruit Drying And System Analysis Of The Process (On The Example Of Persimmon),
2024
Tashkent State Technical University, Tashkent city, Republic of Uzbekistan
Mathematical Modeling Of Fruit Drying And System Analysis Of The Process (On The Example Of Persimmon), Gani Dadayev, Jasur Safarov, Shakhnoza Sultanova, Qobiljon Muxiddinov
Technical science and innovation
Vegetable raw materials, as an object of drying, are characterized by a large amount of water and a low content of dry substances. Vegetable raw materials have a capillary-porous structure. Food products contain both bound and free moisture at the same time. The removal of moisture from the material during drying depends on the total moisture content and the form of connection of moisture with the material. Adsorption and osmotic - bound moisture is retained at the interface of colloidal particles with the environment. Food products contain both bound and free moisture at the same time. The quantitative ratio between …
Improvement Of Convective Drying Equipment,
2024
Belarusian National Technical University, Minsk city, Republic of Belarus;
Improvement Of Convective Drying Equipment, A Ponasenko, Jasur Safarov, Shaxnoza Sultanova
Technical science and innovation
Drying of agricultural raw materials is an energy-consuming but integral process. Therefore, increasing the efficiency of drying and improving the quality indicators of dried material at minimum material and energy costs is relevant for producers of agricultural products. By present time numerous researches on improvement of constructions and processes of work of dryers providing satisfactory parameters of energy saving have been carried out. In some scientific materials it is shown that the use of generative gas and straw as fuel allows to reduce energy costs for the drying process in the fluidised bed dryer by 10-30%, the quality of seeds …
Capacitive Electrode Based Moisture Measurement Converter Errors And How To Eliminate Them,
2024
Tashkent State Technical University, Tashkent city, Republic of Uzbekistan
Capacitive Electrode Based Moisture Measurement Converter Errors And How To Eliminate Them, Hamdam Jabborov, Temurbek Rashidov
Technical science and innovation
The article discusses the errors associated with the moisture measuring transducer that is based on the cylindrical electrode, along with their sources and calculation formulas for error elimination. The initial capacitance of the capacitive electrode humidity converter is dependent on its geometric parameters, such as the radii of the electrodes and their length. Accurate calculation of these geometric parameters enables the reduction of regular measurement errors in the input and switching circuit of the moisture converter to a minimum value, resulting in a significant increase in the informativeness and accuracy of the output signal. Consequently, some sources of measurement errors …
Existing Methods For Monitoring Power Autotransformers,
2024
Tashkent State Technical University, Tashkent city, Republic of Uzbekistan
Existing Methods For Monitoring Power Autotransformers, Nurali Berdiyorovich Pyrmatov, Dilafruz Rustamjon Qizi Abdullabekova
Technical science and innovation
autotransformers, methods, diagnostics, efficiency, monitoring.Particular attention is given to analyzing the gas composition of transformer oil, which is a sensitive indicator of various defects such as thermal breakdown and heating. In addition, methods based on the measurement of external magnetic field strength are discussed. This technique provides a unique opportunity to detect magnetic anomalies associated with possible defects in the structural components of the transformer. The article emphasizes that successful monitoring requires an integrated approach, combining different techniques. The authors analyze the advantages and limitations of each method and offer practical recommendations for integrating these methods into maintenance systems. In …
Influence Of Foil Stamping Parameters On Image Quality,
2024
Professor, Doctor of Technical Sciences,Tashkent Institute of Textile and Light Industry, Tashkent city, Republic of Uzbekistan;
Influence Of Foil Stamping Parameters On Image Quality, Khalima Abishevna Babakhanova, Mukhlisa Ergashevna Khasanova, Aziz Azimjonovich Soadatov, Nigora Junaydullaevna Sadriddinova
Technical science and innovation
The paper evaluates the influence of technological process parameters, namely die temperature and pressure force, on the quality of foil stamping, which is one of the types of finishing having a wide range of applications due to giving unique decorative and protective elements to printed products. When evaluating the influence of process parameters on the linearity and coverability of the image, it was found that the pressure force has less influence on the result than the temperature. According to the data of the study, it can be concluded that the maximum percentage of completeness of covering is achieved at a …
Enhancing Bridge Resilience And Overheight Vehicle Mitigation Through Innovative Sacrificial Cushion Systems, Aly Mousaad Aly, Marc Hoffmann
Faculty Publications
Transportation departments have made significant strides in addressing the challenges posed by the increasing weights of trucks on bridges. While there is a growing awareness of overheight vehicle collisions with bridges, implementing effective countermeasures remains limited. The susceptibility of bridges to damage from such collisions is on the rise, further exacerbated by unpredictable lateral impact forces. This study employs nonlinear impact analysis to assess the response of an unprotected vehicle-girder model, yielding realistic deformation outcomes comparable to observed impacts on the US-61 bridge. Predictions for a truck traveling at 112.65 km/h indicate deformations of 0.229 m, 0.161 m, and 0.271 …
On Quantifying Global Carbon Emission From Oil Contaminated Lands Over Centuries,
2024
Edith Cowan University
On Quantifying Global Carbon Emission From Oil Contaminated Lands Over Centuries, Kaveh Sookhak Lari, Greg B. Davis, Trevor Bastow, John L. Rayner
Research outputs 2022 to 2026
Petroleum releases into the subsurface contribute to global soil carbon emissions. Quantifying releases and changes in releases of carbon from soils over the lifetime of a spill is complex. Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) embodies all key mechanisms for transformation to carbon gases and their release from soils including partitioning, transport and degradation of petroleum components. Quantification of the interconnected behaviours of the soil microbiome, fluid flow, multi-component transport, partitioning, and biodegradation is crucial for understanding NSZD. Volatilization from LNAPL, aerobic biodegradation, methanogenesis, and heat production all lead to release of greenhouse gases to …
