A New Saturation-Based Framework For Compaction Quality Control,
2023
Mississippi State University
A New Saturation-Based Framework For Compaction Quality Control, Kevin Clark Miller
Theses and Dissertations
Field compaction control is arguably the most common yet critical quality control procedure in geotechnical engineering. Since the early 1930s, the systematic process for performing quality control of compacted soils has often been performed by measuring the in-place dry unit weight (or density) and as-compacted soil moisture content after placement in a fill. However, the current practice overlooks several facts resulting from comparing soil prepared and compacted in the laboratory to soils placed and compacted in the field. These issues include comparing the compaction energy in the lab versus what is applied in the field, and the behavior of saturated …
Design Of Stormwater Bmps For Surface And Groundwater Protection Based On Site-Scale Soil Properties: Phase I,
2023
University of Central Florida
Design Of Stormwater Bmps For Surface And Groundwater Protection Based On Site-Scale Soil Properties: Phase I, Kelly Kibler, Lisa Chambers, Melanie Beazley
Florida DOT
Much of Earth’s nutrient cycling takes place in soils. Characteristics of soils control physical, chemical, and biological processes that determine rates of nutrient fluxes, storage, or transformation. As remediation of excess nutrients in stormwater runoff is one function of stormwater Best Management Practices (BMPs), the soil profile constitutes one of the most important factors of BMP design. Variation observed in BMP effectiveness (e.g., why one BMP design works effectively in one place and not another) can often be explained by variations in the soil profile, either through direct means or by a soil’s influence on hydraulics of stormwater flow through …
Verification Of Astm Centrifugation Equations For Soil Suction Determination,
2023
University of Arkansas, Fayetteville
Verification Of Astm Centrifugation Equations For Soil Suction Determination, Esteban Maclein Miranda Pinzon
Graduate Theses and Dissertations
The unit correction constant (B) in the ASTM D6836 standard needs to be evaluated. The B-value was proposed to be 0.00548 instead of 0.00553. This apparent discrepancy led to an investigation comparing the predicted and measured suction values for high air entry (HAE) ceramic disks. A Beckman-Coulter Model J6-MI six-bay centrifuge and a WP4C Dewpoint Potentiameter were used in the testing program. HAE ceramic disks rated with bubbling pressures of 3-bar and 5-bar were used as analogue soil specimens. The HAE ceramic disks were spun in the small-scale centrifuge to apply prescribed suction amounts and then placed in the WP4C …
Alkali Silica Reaction Mitigation Using Glycerin,
2023
University of Arkansas, Fayetteville
Alkali Silica Reaction Mitigation Using Glycerin, Ana Laura Errigo Chanis
Graduate Theses and Dissertations
The use of glycerin as a concrete additive to reduce alkali silica reaction (ASR), was evaluated and is presented in this study. Specifically, the United States Army Corps of Engineers (USACE) ultra-accelerated alkali silica reaction testing procedure by means of autoclaving was employed to examine the use of glycerin for ASR mitigation or reduction by analyzing mortar bar expansion data. The fine aggregates used in this investigation consisted of highly reactive Jobe Sand or Los Lunas Sand with an autoclave expansion of 0.5 and 0.4 percent, respectively. The laboratory investigation was performed by recording the amount of expansion of the …
Comparison Of Condition Prediction Models To Prioritize Sewer Pipe Inspections,
2023
University of Texas at Arlington
Comparison Of Condition Prediction Models To Prioritize Sewer Pipe Inspections, Madhuri Arjun
Civil Engineering Dissertations - Archive
Over time, wastewater collection systems deteriorate, necessitating ongoing adjustments and the development of asset management frameworks by utility proprietors to maintain the performance of their assets. Any asset management framework should emphasize the importance of asset inspection and condition assessment for system-efficient operation and maintenance. In the United States, closed-circuit television (CCTV) is the most common method for inspecting the interior of sewer pipelines. This procedure is expensive and time-consuming due to a city's extensive inventory of pipes. Due to the immense quantity of these pipes, every municipality can only inspect some sections of sanitary sewer pipes promptly. Therefore, the …
Artificial Intelligence-Based Evaluation Of Pipeline Structures Using Multi-Sensor Robots,
2023
University of Texas at Arlington
Artificial Intelligence-Based Evaluation Of Pipeline Structures Using Multi-Sensor Robots, Mohammad Shaher Moh'd Rababeh
Civil Engineering Dissertations - Archive
ABSTRACT: ARTIFICIAL INTELLIGENCE-BASED EVALUATION OF PIPELINE STRUCTURES USING MULTI-SENSOR ROBOTS Mohammad Shaher Rababeh, Ph.D. The University of Texas at Arlington, August 2023 Supervising Professor: Ali Abolmaali All around the world, pipeline systems are safe, efficient, and cost-effective for transporting liquids such as stormwater and wastewater. However, different defects develop in pipeline structures with aging and use. Leaks and significant failures might create severe danger for the environment, and for humans in urban areas. This deterioration in pipelines happens under the influence of different factors. In general, observing and evaluating pipelines will allow us to understand its behavior under various conditions …
Breaking The Lignin Barrier With Termite Tav5 Treatment Technology (T4): Biopower And Biofuel From Agricultural Waste,
2023
University of Texas at Arlington
Breaking The Lignin Barrier With Termite Tav5 Treatment Technology (T4): Biopower And Biofuel From Agricultural Waste, Hussain Ali
Civil Engineering Dissertations - Archive
Bioenergy obtained from anaerobic digestion of lignocellulose biomass is one of the promising candidates to help move towards a fossil fuel free future. Agriculture waste has up to 90% lignocellulose content, and the eight leading US crops produce over 500 million tons of residue each year. Unfortunately, lignin is resistant to microbial attack under low oxygen conditions which normally occur in anaerobic digesters, and it often shields lignocellulose components (cellulose and hemicellulose) from decomposition as well. Traditional physical/chemical methods for destroying lignin are typically costly due to energy and chemical requirements and can create toxic intermediates (Rahimi et al., 2020). …
Coastal Home Elevation For Flood Mitigation: Structural Safety And Benefit/Cost Analysis,
2023
University of Texas at Arlington
Coastal Home Elevation For Flood Mitigation: Structural Safety And Benefit/Cost Analysis, Cedric Ling
Civil Engineering Dissertations - Archive
construction practice along the Texas Gulf coast under uniform floor live load. The first specimen had four panels with monolithically poured grade beams around each panel, while the second specimen had two panels with monolithically poured grade beams supported by additional steel beams. The second specimen also included carbon fiber reinforced polymer (CFRP) laminate retrofitting under one of the panels. The slabs were supported by concrete block masonry piers with various contact conditions. It was found that the typical contractor-determined elevation layout can withstand the building code-mandated floor live load. Increased column spacing decreased slab load capacity as expected. The …
Assessing The Treatment Efficiency Of Expanded Shale As A Filter Medium In A Bioswale,
2023
University of Texas at Arlington
Assessing The Treatment Efficiency Of Expanded Shale As A Filter Medium In A Bioswale, Ashish Bhurtyal
Civil Engineering Theses - Archive
This thesis presents a laboratory investigation focusing on the use of expanded shale as a filter media in bioswales. Bioswales are known for their effectiveness in improving water quality by removing pollutants such as total suspended solids (TSS) and turbidity. While conventional filter media with rocks, sand, and mulches have been utilized in bioswales to enhance infiltration capacity, the potential of expanded shale as an engineered media has not been thoroughly assessed and documented. The study conducted a series of thirty experiments involving three different flow conditions to mimic typical Best Management Practices (BMP) applications. The primary focus was on …
Analytical And Experimental Of Electromagnetic Wave Propagation Effect On Moisture And Corrosion In An Inhomogeneous Medium,
2023
University of Texas at Arlington
Analytical And Experimental Of Electromagnetic Wave Propagation Effect On Moisture And Corrosion In An Inhomogeneous Medium, Dafnik Saril Kumar David
Civil Engineering Dissertations - Archive
This dissertation presents electromagnetic wave studies for infrastructure. The research contributes to a comprehensive understanding of electromagnetic wave propagation in moisture and provides insights into corrosion detection and monitoring in reinforced concrete infrastructure. Three major studies are performed to: 1) understand the multiple wave scattering in inhomogeneous moisture medium, 2) validate the experimental reflection through analytical finite difference time domain simulations with experimental measurements, and 3) evaluate the electromagnetic wave responses in the early stage and post stage corrosion experimentally, and 4) develop rapid corrosion monitoring methodology for field applications by employing cutting-edge electromagnetic wave image processing as refer to …
Experimental Investigation Of Water Quality Impact On The Compressive Strength Of Concrete,
2023
University of Texas at Arlington
Experimental Investigation Of Water Quality Impact On The Compressive Strength Of Concrete, Shayan Sharifzad
Civil Engineering Dissertations - Archive
Water is an indispensable component in concrete, as it enables crucial chemical reactions. Therefore, the quality of water used in concrete plays a vital role in its performance. Contaminated water, sewage, or high-salt water can disrupt the cement's setting process and overall performance. As a result, it is crucial to prioritize the use of drinking water or water of equivalent quality in concrete production. While the ideal water-to-cement ratio for concrete is typically around 0.20, practical considerations often require a higher water content ranging from 0.30 to 0.70. This increased water consumption is necessary to ensure workability and achieve optimal …
Disaster Management And Recovery: Estimating The Disaster Impacts On Construction Costs And Evaluating The Policy Effects On Disaster Recovery,
2023
University of Texas at Arlington
Disaster Management And Recovery: Estimating The Disaster Impacts On Construction Costs And Evaluating The Policy Effects On Disaster Recovery, Sooin Kim
Civil Engineering Dissertations - Archive
A rapidly increasing number of natural hazards pose an inevitable threat to communities. More than a hundred natural hazards strike the United States every year, causing numerous fatalities and billions of dollars of property and infrastructure damage. The total cost of U.S. weather and climate disasters since 1980 has already exceeded 2 trillion dollars. As the number of U.S. county-level disasters has approximately tripled in recent decades due to rapid climate change, a greater share of the population is now more likely to expose to natural disasters. Adequate and timely reconstruction and recovery in post-disaster situations are essential for the …
Wide Band-Gap Metamaterials As Seismic Shields,
2023
University of Texas at Arlington
Wide Band-Gap Metamaterials As Seismic Shields, Ashraf Mohammed Daradkeh
Civil Engineering Dissertations - Archive
In the past decade, a new paradigm gained popularity among researchers aiming to protect structures from low-frequency seismic vibrations using metamaterials. However, developing a workable design for metamaterials is still challenging, given the various factors such as material availability, size, and shape of its components. This project proposes a new configuration that can widen the attenuation frequency of metamaterials and evaluates the attenuation ability of double-graded metamaterials. The project investigates unit cell parameters such as but not limited to size, density, and modulus of elasticity to finalize a unit cell with the broadest possible bandgap by using common construction material …
Model Development To Evaluate Consumers’ Intention To Adopt Electric Vehicles,
2023
University of Texas at Arlington
Model Development To Evaluate Consumers’ Intention To Adopt Electric Vehicles, Apurva Pamidimukkala
Civil Engineering Dissertations - Archive
ABSTRACT: The ever-increasing concern over climate change is compelling global economies to employ alternative fuel technology to combat the vehicular emissions of greenhouse gases. Electric vehicles (EVs) offer a viable environmentally friendly alternative that has the potential to facilitate an effective shift towards a sustainable transportation system with low emissions while preserving the environment. However, well-intentioned policies and other incentives have not been able to transcend the factors that prevent their adoption. Therefore, this research aims to develop three models to determine the factors affecting consumers’ willingness to adopt EVs. A questionnaire survey was designed based on an extensive literature …
Estimation Of Suspended Sediment Concentration Along The Lower Brazos River Using Satellite Imagery And Machine Learning,
2023
University of Texas at Arlington
Estimation Of Suspended Sediment Concentration Along The Lower Brazos River Using Satellite Imagery And Machine Learning, Trevor Stull
Civil Engineering Theses - Archive
ABSTRACT: Suspended sediment transport in river basins is important for many water management planning activities to maintain safe drinking water for the community and maintenance of water quality and waterways for the ecosystem. Currently, the traditional way to measure suspended sediment effectively and reliably is by collecting field samples in the river body, which is very time consuming and only provide a point value of suspended sediment within the waterbody at the instant the sample was taken. This thesis focuses on developing models that estimate suspended sediment concentrations for the lower Brazos River using satellite imagery from publicly available data …
Comparative Mechanical Property Evaluation Of Ultra-High-Performance Concrete Reinforced With High-Strength Steel Straight And Hooked Fibers,
2023
University of Texas at Arlington
Comparative Mechanical Property Evaluation Of Ultra-High-Performance Concrete Reinforced With High-Strength Steel Straight And Hooked Fibers, Sujan Kumar Singh
Civil Engineering Theses - Archive
This study investigates the tensile properties and ductility of ultra-high-performance concrete (UHPC) reinforced with high-strength steel hooked fibers with a tensile strength of 445 ksi (3,070 MPa) and compares its tensile performance to that of UHPC reinforced with commonly used high-strength smooth steel microfibers with a tensile strength of 2,160 MPa (313 ksi). The research is based on a proprietary mix developed at the University of Texas at Arlington and investigates the mechanical properties of UHPC with varying fiber volume fractions of 1.5%, 2%, 2.25%, and 2.4%. The experimental results indicate that UHPC reinforced with high strength hooked fibers generally …
Developing An Early Warning System Of Highway Slope Failure Based On In-Situ Hydraulic Conductivity Of Soil,
2023
University of Texas at Arlington
Developing An Early Warning System Of Highway Slope Failure Based On In-Situ Hydraulic Conductivity Of Soil, Alinda Gupta
Civil Engineering Dissertations - Archive
Highway slope failure is globally a momentous issue. Highway slope failure poses a significant issue in transportation infrastructure. Several factors can contribute to slope failures, including geological conditions, weather events, and human activities. Weather events like heavy rainfall, cyclic shrinkage and swelling can trigger slope failures constructed on high plastic clays. It increases pore water pressure, causing soil saturation, and inducing failure. The consequences of highway slope failures are severe, ranging from traffic disruptions, road closures, and damage to vehicles and infrastructure, to potential injuries or loss of lives. Addressing and mitigating slope failure risks is crucial for ensuring the …
Evaluation Of A First Flush System With Multiple In-Line Bypassing Fuel Separator Components In The Industrial Area Of An Airport,
2023
University of Texas at Arlington
Evaluation Of A First Flush System With Multiple In-Line Bypassing Fuel Separator Components In The Industrial Area Of An Airport, Kazi Rashid
Civil Engineering Dissertations - Archive
ABSTRACT: This dissertation explores the effectiveness of a complex system employed to capture the first flush (FF) generated from industrial activities occurring at an airport. The First Flush System (FFS) utilized by the DFW International Airport is comprised of multiple in-line bypassing fuel separators and located in many parts of the Air Operations Area (AoA) of the airport as well as maintenance areas. The system collects and conveys a portion of the rainfall runoff generated from the drainage areas of the industrial land-use portion of the DFW airport to a Stormwater Pre-treatment Plant (SWPTP) and then to Trinity River Authority …
The Impact Of Improper Solid Waste Management On Public Health Of African Cities. The Case Of Addis Ababa City, Ethiopia.,
2023
University of Texas at Arlington
The Impact Of Improper Solid Waste Management On Public Health Of African Cities. The Case Of Addis Ababa City, Ethiopia., Tesfaye Abebe Alemu
Civil Engineering Dissertations - Archive
Many African cities are generating an ever-increasing amount of waste and the effectiveness of their solid waste collection and disposal systems is currently declining. Therefore, research has been striving to develop a sustainable and integrated solid waste management system that fits the current challenges facing the local environment. The objective of this study is to analyze the impact of improper solid waste management that affects the air and water quality of the near Koshe open dump site and around the Addis Ababa City, and their adverse effect on the public health living around them. The rapid increase of population in …
The Road Map For Sustainable Waste Management In The Federal Democratic Republic Of Ethiopia,
2023
University of Texas at Arlington
The Road Map For Sustainable Waste Management In The Federal Democratic Republic Of Ethiopia, Assegid Yimenu
Civil Engineering Dissertations - Archive
Solid Waste Management (SWM) is a global issue from its social, environmental, and economic aspects. Poor SWM is one of the significant causes of resource degradation, environmental pollution, and public health problems. In this study, households’ solid waste generation and characterization were determined for selected cities in Ethiopia. Quantitative and qualitative study methods were applied to collect primary and secondary data to assess the household’s MSW generation rate and characterize the waste type's physical composition. The households’ daily MSW generation rates in Bole and Kirkos sub-cities, Addis Ababa, were found to be 0.54 and 0.26 Kg/capita/day, respectively, and the average …
