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Full-Text Articles in Engineering

Unconventional Water Resources: Global Opportunities And Challenges, Zahra Karimidastenaei, Tamara Avellán, Mojtaba Sadegh, Bjørn Kløve, Ali Torabi Haghighi Jun 2022

Unconventional Water Resources: Global Opportunities And Challenges, Zahra Karimidastenaei, Tamara Avellán, Mojtaba Sadegh, Bjørn Kløve, Ali Torabi Haghighi

Civil Engineering Faculty Publications and Presentations

Water is of central importance for reaching the Sustainable Development Goals (SDGs) of the United Nations. With predictions of dire global water scarcity, attention is turning to resources that are considered to be unconventional, and hence called Unconventional Water Resources (UWRs). These are considered as supplementary water resources that need specialized processes to be used as water supply. The literature encompasses a vast number of studies on various UWRs and their usefulness in certain environmental and/or socio-economic contexts. However, a recent, all-encompassing article that brings the collective knowledge on UWRs together is missing. Considering the increasing importance of UWRs ...


Utilization Of Steel Slag In Development Of Sustainable And Durable Concrete., Karthik Prabhu T Dr, Gowri Shankar M Mr., Jagadesh P Dr., Nagarajan V Dr. May 2022

Utilization Of Steel Slag In Development Of Sustainable And Durable Concrete., Karthik Prabhu T Dr, Gowri Shankar M Mr., Jagadesh P Dr., Nagarajan V Dr.

International Journal of Advanced Technology in Civil Engineering

This paper reflects the results of an experimental investigation of the strength, permeability, abrasion, carbonation, and shrinkage characteristics of concrete containing various percentages of steel slag as partial replacement of natural fine aggregates. M 30 Grade concrete was designed as per specific national specifications. Steel slag was used to replace natural sand in the range of 0– 50%. It was observed that the steel slag blended concrete with up to 50% substitution exhibited a comparable compressive and flexural strength when compared to the control specimens. From the Dorry’s abrasion test, it was noted that the specimens could be implemented ...


Hydrodynamic Limitations To Mangrove Seedling Retention In Subtropical Estuaries, Kelly M. Kibler, Christian Pilato, Linda Walters, Melinda Donnelly, Jyotismita Taye May 2022

Hydrodynamic Limitations To Mangrove Seedling Retention In Subtropical Estuaries, Kelly M. Kibler, Christian Pilato, Linda Walters, Melinda Donnelly, Jyotismita Taye

Flow-biota Interaction and Natural Infrastructure Design

Mangrove forest sustainability hinges upon propagule recruitment and seedling retention. This study evaluates biophysical limitations to mangrove seedling persistence by measuring anchoring force of two mangrove species (Rhizophora mangle and Avicennia germinans). Anchoring force was measured in 362 seedlings via lateral pull-tests administered in mangrove forests of two subtropical estuaries and in laboratory-based experiments. Removal mechanism varied with seedling age: newly-established seedlings failed due to root pull-out while seedlings older than 3 months failed by root breakage. Anchoring force of R. mangle seedlings was consistently and significantly greater than A. germinans (GLM: p = 0.002), however force to remove A ...


Mechanical Property Relationships Of Cement Or Lime Stabilized Soils Throughout A Pavement's Life, Leigh E.W. Ayers May 2022

Mechanical Property Relationships Of Cement Or Lime Stabilized Soils Throughout A Pavement's Life, Leigh E.W. Ayers

Theses and Dissertations

Soil-cement is an integral part of pavement design, especially in areas that are aggregate deprived, such as Mississippi. Current designs are reliant on the relationship of unconfined compressive strength (UCS) to other mechanical properties. The other properties discussed in this dissertation are Modulus of Elasticity (E), Indirect Tensile Strength (St), and Modulus of Rupture (MOR). This dissertation includes a comprehensive review of past design methods and mechanical property relationships. While some mechanical property relationships were shown to be well understood (i.e. St to UCS), others were not as accurate, especially for the later life mechanical properties (i.e. MOR ...


Comparing The Stiffness Of Cold In-Place Recycled Asphalt Pavement To Hot Mix Asphalt: Determining The Reproducibility Of The Stiffness Rebound Test, Tanner Turben May 2022

Comparing The Stiffness Of Cold In-Place Recycled Asphalt Pavement To Hot Mix Asphalt: Determining The Reproducibility Of The Stiffness Rebound Test, Tanner Turben

Civil Engineering Undergraduate Honors Theses

The Stiffness Raveling Mechanism Test (SRMT) was originally developed as an indirect measure of pavement stiffness to determine a pavement’s tendency to ravel, a type of damage. Regarding rehabilitation of existing roadways by Full Depth Reclamation (FDR) Cold In-Place Recycling (CIR), concern of field repeatability was expressed (Hill & Braham, 2016).

An analysis of lab-compacted samples of CIR and Hot Mix Asphalt (HMA) was performed to determine if the results could be reproduced between CIR and HMA. Additionally, the experiment observed the effects of percent air voids, temperature, and moisture conditioning on CIR and HMA. Three samples were prepared for ...


Development Of A Next-Generation Non-Proprietary Portable Concrete Barrier, Riley Ruskamp May 2022

Development Of A Next-Generation Non-Proprietary Portable Concrete Barrier, Riley Ruskamp

Civil and Environmental Engineering Theses, Dissertations, and Student Research

Portable concrete barriers (PCBs) are segmented barriers made of precast concrete units that are connected by various load-bearing hardware. PCBs are typically used to shield work zones by redirecting errant vehicles upon impact with the barrier system. Most commonly-available PCBs have demonstrated performance issues arising from the sloped face of the barrier, which encourages vehicles to pitch and roll during impact, potentially resulting in vehicle rollover. Concerns also exist regarding the large dynamic deflections exhibited by these systems that can encroach upon the protected work zone or require anchoring to prevent large displacements. In addition to these concerns, the American ...


Risk Assessment Of Hazardous Material Transportation For Small And Tribal Communities, Harrison Redepenning May 2022

Risk Assessment Of Hazardous Material Transportation For Small And Tribal Communities, Harrison Redepenning

Civil and Environmental Engineering Theses, Dissertations, and Student Research

By and large transportation of hazardous materials (HazMat) across the US is increasing, with truck transportation as the most common method of transport. Smaller communities (population <5,000) and Native American communities often lack the economic and political influence to quantify the dangers that HazMat incidents present to the immediate and surrounding areas. Lack of such information is an impediment to adequate preparedness in cases of HazMat incidents. This research focuses on assessing the vulnerability of small and tribal communities in Nebraska to the impacts of highway HazMat incidents. This was done by estimating the expected number and type of HazMat incidents per population in each community. Additionally, statistical analysis was conducted on actual HazMat incidents to determine if small and Native American communities experience a higher rate of incidents per population and per HazMat VMT than large and other small communities respectively. For per population, it was found small versus large is statistically significant while Native American versus other small communities was not significant. For per HazMat VMT, neither comparison was found to be statistically significant. In estimated HazMat incidents, actual HazMat incidents per population, and actual HazMat incidents per HazMat VMT, small communities had higher mean values than their large counterparts. Communities on Native American reservation land experienced a higher estimated and lower actual HazMat incident rate per population than other small communities. For actual HazMat incidents per VMT, Native American communities had a higher rate than other small communities.

Advisor: Aemal Khattak


A Physical Model Of Deadmans Run, Quinn Brandt May 2022

A Physical Model Of Deadmans Run, Quinn Brandt

Civil and Environmental Engineering Theses, Dissertations, and Student Research

A physical model of Deadmans Run and a pair of railroad bridges was constructed to assess the impacts of the bridges on flood flows. Lower Platte South Natural Resources District is planning a series of improvements to Deadmans Run to improve flood conveyance capacity and remove approximately 500 homes and businesses from the floodplain. The rail bridges are located less than a mile from the confluence of Deadmans Run and Salt Creek, meaning the bridges present a significant bottleneck to the planned improvements. The physical model was used to characterize the drag effects caused by the bridges, which was used ...


Lidar Data Analysis Strategies To Determine Features Indicative Of At-Risk Coastal Sites, Ashley Elkins May 2022

Lidar Data Analysis Strategies To Determine Features Indicative Of At-Risk Coastal Sites, Ashley Elkins

Theses and Dissertations

Light detection and ranging (LiDAR) derived volume changes provide both visual and statistical information for how project shorelines change over time. For beach erosion control (BEC) and coastal storm risk management (CSRM) projects, changes across storm events are fundamental to understanding a project’s progress. The Coastal Systems Portfolio Initiative (CSPI) aims to document and track U.S. Army Corps of Engineers (USACE) projects in a holistic systems-based manner. This web based geographic information system currently lacks numerical metrics beyond fill volumes to represent a project’s progress or reliability. This study aims to identify potential reliability metrics using the ...


Wave Interactions And Energy Cascade, Bailey Downing May 2022

Wave Interactions And Energy Cascade, Bailey Downing

Civil Engineering Undergraduate Honors Theses

Structural engineers design buildings and their components to withstand code-specified wind loads. The ASCE 7-16 manual sets the standards for calculating wind loads in the U.S. Depending on the velocity of wind, deflections may occur as wind passes through the building. The pressure reported from ASCE are based on wind tunnel measurements. The peak pressure from ASCE 7 is much less than what is measured from the field for a low-rise building. As an alternative economic tool, Computer modeling has been developed to help with this dilemma. Methods based on computational fluid dynamics (CFD) are used to calculate velocities ...


Determining Earthquake Impacts On Arkansas' Roadway Network: An Application Of Hazus., Simon Rothwell May 2022

Determining Earthquake Impacts On Arkansas' Roadway Network: An Application Of Hazus., Simon Rothwell

Civil Engineering Undergraduate Honors Theses

Natural hazards are a dangerous and unpredictable aspect of life on earth. They can cause devastating damage to our surroundings that makes movement of people, goods, and emergency services difficult. There is a need to plan for these disasters to ensure that damages to our infrastructure and people are minimized. It can be difficult for planners to determine which parts of a roadway network are most vulnerable to a specific disaster and what their impact on the rest of the network may be. This thesis uses a nationally available natural disaster estimation tool developed by FEMA called “Hazus” (FEMA, 2020 ...


Evaluating The Effects Of Curing Methods On Bcsa Cement Concrete, Hannah Allen May 2022

Evaluating The Effects Of Curing Methods On Bcsa Cement Concrete, Hannah Allen

Civil Engineering Undergraduate Honors Theses

BCSA cement is a type of cement that makes concrete set up much quicker than typical portland cement concrete. BCSA cement concrete also has a much higher compressive strength than that of portland cement concrete. This study was conducted to determine the effect of different curing conditions on the compressive strength of BCSA cement concrete.


Community Transportation Needs And Willingness To Use Shared Micromobility: A Case Study Of Fort Smith, Arkansas, Anthony Michael Kammerer May 2022

Community Transportation Needs And Willingness To Use Shared Micromobility: A Case Study Of Fort Smith, Arkansas, Anthony Michael Kammerer

Civil Engineering Undergraduate Honors Theses

Shared micromobility is utilized in “targeted service areas with the usage generally intended for short trips such as "first- and last-mile" connections to complete trips made via other modes, including transit” (Price et al., 2021). In the United States, this practice has especially taken off with the implementation of sharing-based systems. This is evidenced by ridership numbers in the United States growing from 84 million riders nationwide in 2018 to 136 million riders in 2019 (NACTO, 2020). Users often use their smart phone or another similar device to unlock the vehicle after paying a fee on the device through their ...


A Campus Connected: An Analysis Of University Outdoor Spaces, Skylar Wilson May 2022

A Campus Connected: An Analysis Of University Outdoor Spaces, Skylar Wilson

Undergraduate Honors Theses

The purpose of this research is to analyze the evolution of outdoor renovations on East Tennessee State University’s campus by examining the effects these renovations have had on students and faculty, and then using this data to propose possible successful renovations to the remainder of the University Commons project. To complete this project, data was obtained through East Tennessee State University administrative faculty interviews, surveys of students residing in campus resident halls, and observations. By examining the impact on behavior, designers and developers are then able to successfully determine the factors that aid in positively influencing human behaviors. Design ...


Sustainability In Construction Practices As Emphasis On Environmental Investing In Esg Model Grows, Maddie Heal May 2022

Sustainability In Construction Practices As Emphasis On Environmental Investing In Esg Model Grows, Maddie Heal

Management Undergraduate Honors Theses

The purpose of this research is to emphasize the importance of growing investment on environmental initiatives in business ESG models in regard to sustainable practices in construction. The ESG acronym is known as the environmental, social, and governance efforts that businesses strive to incorporate in their models to increase the responsibility of operations.

Investors continue to seek out responsible businesses when choosing which ventures to pursue. The analysis of the current construction crisis, current investments in the right direction of Eco-friendly design regarding construction, and the threats and benefits incentivizing those investments elucidates the need to emphasize socially responsible investment ...


An Extraction Method To Quantify The Fraction Of Extracellular And Intracellular Antibiotic Resistance Genes In Aquatic Environments, Kassidy N. O'Malley, Walter M. Mcdonald, Patrick J. Mcnamara May 2022

An Extraction Method To Quantify The Fraction Of Extracellular And Intracellular Antibiotic Resistance Genes In Aquatic Environments, Kassidy N. O'Malley, Walter M. Mcdonald, Patrick J. Mcnamara

Civil and Environmental Engineering Faculty Research and Publications

As the abundance and diversity of antibiotic resistance genes increases in the environment, there is a concurrent increase in the threat to public and ecosystem health. Extracellular antibiotic resistance genes (eARGs) are cell-free DNA that can promote the development of antibiotic resistance via transformation by competent bacterial cells. Despite this role, eARGs have not been well characterized in different environmental waters. Their small size and low concentrations in some aquatic environments render them difficult to extract. The aim of this research was to modify an eARG extraction method to determine the abundance of both eARGs and intracellular ARGs (iARGs) in ...


Observations On Infragravity Wave Energy During An Extreme Event On Dauphin Island, Alabama, Sean M. Mcquagge May 2022

Observations On Infragravity Wave Energy During An Extreme Event On Dauphin Island, Alabama, Sean M. Mcquagge

Theses and Dissertations

Infragravity (IG) waves are responsible for large volumes of sediment transport in the nearshore environment and therefore have a large influence on morphological changes to barrier islands, especially during extreme event scenarios. While IG waves have been studied at length in the nearshore, less research has been dedicated to their behavior and contributions to morphological change of barrier islands during extreme event overwash and inundation. Continuous measurements of water pressures were collected along two cross-shore transects on Dauphin Island, AL during Hurricane Nate (2017). Using small-amplitude wave theory, instantaneous water elevations were estimated from these pressures. In this study, these ...


Resilience Metrics At Panama City Beach, Florida, Scott L. Spurgeon May 2022

Resilience Metrics At Panama City Beach, Florida, Scott L. Spurgeon

Theses and Dissertations

The term resilience is often used to describe coastal engineering projects, but an increase in resilience has often simply been defined by the ability for a community to recover after an adverse event. This definition is incomplete as there has not been a clear quantitative definition of resilience regarding the coastal environment. Recent research had produced a GIS-based tool that provides a quantitative resilience metric to inform decisions related to engineering in the coastal environment, especially historically. Other research has developed a similar metric that uses Beach-fx results to calculate future resilience based on nourishment alternatives. This study uses the ...


Building Services Engineering May/June 2022 May 2022

Building Services Engineering May/June 2022

Building Services Engineering

No abstract provided.


Performance Of Concrete With Different Cement Finenesses And Nano-Activators, Brandon Faltin Apr 2022

Performance Of Concrete With Different Cement Finenesses And Nano-Activators, Brandon Faltin

Civil and Environmental Engineering Theses, Dissertations, and Student Research

The excessive shrinkage in modern concrete is the result of the construction industry in its quest to complete the job as soon as possible. In order to accomplish this, the fineness of cement was increased significantly in recent decades for a faster rate of strength gain. To combat the cement fineness and reverse the trend of shrinkage, the usage of coarse cements and nanoparticles should be strongly considered. The coarse cement is used to reduce the shrinkage of concrete, while the nanoparticle increases the early strength, alleviating the original concerns of reduced early strength when using coarse cement.

Work in ...


Estimation Of Methane Emissions From Beef Cattle Manure In Nebraska, Noe Hernandez Apr 2022

Estimation Of Methane Emissions From Beef Cattle Manure In Nebraska, Noe Hernandez

Civil and Environmental Engineering Theses, Dissertations, and Student Research

The emission of methane from livestock production contributes to climate change. Cattle manure accounts for one-third of the total methane emission over the lifecycle of beef and dairy production and represents an opportunity to lower the environmental footprint of the beef industry. While models have been developed to estimate methane emissions from manure under certain types of manure storage methods, there is a lack of a user-friendly interface that agricultural or environmental engineers can use to estimate the methane emission from manure for specific regions. Therefore, the goal of this study was to build an interface to estimate methane emissions ...


A Study On The Use Of An Energy-Regenerative Tuned Mass Damper For Vibration Control And Monitoring Of Base-Isolated Buildings, Mohsen Amjadian Apr 2022

A Study On The Use Of An Energy-Regenerative Tuned Mass Damper For Vibration Control And Monitoring Of Base-Isolated Buildings, Mohsen Amjadian

Civil Engineering Faculty Publications and Presentations

This paper studies the use of an energy-regenerative tuned mass damper (ER-TMD) to (a) passively control the displacement of superstructure of a two-degree-of-freedom base-isolated building model equipped with elastomeric rubber bearings and (b) simultaneously generate electric energy that can be used to power conventional sensors installed on the building to monitor its response during an earthquake. The proposed passive ER-TMD is composed of two parts: mechanical and electrical. The mechanical part consists of a moving mass (i.e., TMD mass) attached to the base floor through a linear spring-damper system, and the electrical part consists of two large permanent magnets ...


Hydrodynamic Signatures Of Recreational Boat Wakes And Their Influence To Sediment Entrainment Along The Shoreline Of A Shallow Estuary, Kelly M. Kibler Apr 2022

Hydrodynamic Signatures Of Recreational Boat Wakes And Their Influence To Sediment Entrainment Along The Shoreline Of A Shallow Estuary, Kelly M. Kibler

Predicting Boat Wake Bank Erosion Risk

Wave energy from recreational boat wakes is associated with erosion and degradation of shoreline ecotones. However, wake effects are often assumed to be negligible when boating lanes are located far from shore. In this study, field experiments were conducted to characterize hydrodynamics of recreational boat wakes at the shoreline of a shallow estuary as offshore sailing-line distance varied from 50 to 200m. Results indicate that wake events were considerably more energetic than ambient conditions, with an average 20% increase in wave height, 190% increase in near-bed orbital velocity, and 110% increase in wave-induced shear stress. Wake events generated farther from ...


Analyzing Resource Allocation And Levelling In Construction Projects, Mohamed Eizeldin, Mohamed Hussein Hegazy, Ahmed Alhady, Shahir Ashraf Apr 2022

Analyzing Resource Allocation And Levelling In Construction Projects, Mohamed Eizeldin, Mohamed Hussein Hegazy, Ahmed Alhady, Shahir Ashraf

Civil Engineering

Project scheduling has been crucial in any construction project since applying poor scheduling may lead to cost overruns and delays. The most commonly used technique for scheduling is the critical path method (CPM). As CPM neglects the availability of resources and assumes only time as a constrain; therefore, the resource allocation problem (RAP) technique is introduced. RAP appears when the number of resources required exceeds the number of resources available. Moreover, as a result of solving the RAP, another problem will occur known as the resource leveling problem (RLP). RLP lead to lots of hiring and firing of laborers. Researchers ...


A Smart Illicit Discharge Monitoring System, Alexander Campbell, Henry S. Armstrong, Tien Yee Apr 2022

A Smart Illicit Discharge Monitoring System, Alexander Campbell, Henry S. Armstrong, Tien Yee

Symposium of Student Scholars

In the present study, we attempt to use a variety of sensors to monitor illicit discharges that are present near the Kennesaw State University Marietta Campus. The US Environmental Protection Agency defines an illicit discharge as “any discharge into a storm drain system that is not composed entirely of stormwater”. Each year, approximately 860 billion gallons of sewage spills are reported throughout the country. In Georgia, sewer spills data shows that spills may range from hundreds of gallons to millions of gallons depending on the severity of the leak. The undetected sewer leaks may degrade the water quality in nearby ...


Cost-Efficient Bridge Scour Health Monitoring Using Commercial Sensors, Connor Embleau, Tien Yee, Metin Oguzmert, Mahyar Amirgholy, Alan Akazemi, Dale Goff Apr 2022

Cost-Efficient Bridge Scour Health Monitoring Using Commercial Sensors, Connor Embleau, Tien Yee, Metin Oguzmert, Mahyar Amirgholy, Alan Akazemi, Dale Goff

Symposium of Student Scholars

Bridge scouring has been a major international issue regarding bridge health and the overall longevity of a bridge. A common bridge health concern such as scouring accounts for close to 60% of bridge failures in the United States and is a leading cause to a bridge being in critical condition. Traditional methods to combat this failure is to measure the scour depth to assess a bridge health. Due to safety concerns of the traditional method, this study proposes to monitor a bridge’s health using a vibration-based technique. At present, vibration-based techniques have yet to be utilized reliably in the ...


Assessment Of Walls With Phase Change Materials Through Synergistic And Performance Measures Using Experimental And Simulated Test Houses, Cory Enfield Apr 2022

Assessment Of Walls With Phase Change Materials Through Synergistic And Performance Measures Using Experimental And Simulated Test Houses, Cory Enfield

Scholar Week 2016 - present

Current research on living and working spaces continues to strive to identify the most energy-efficient methods for heating and cooling, and many novel technologies have emerged from the research. One of the most promising, and the topic of this quantitative analysis, is the retrofitting of phase change materials (PCMs) into the walls of structures. Research has shown positive results, such as a reduced transfer of heat through walls when PCMs are retrofitted into wall construction. However, more analysis regarding PCMs’ energy-saving capabilities is needed to convince the general population that despite the initial cost for retrofitting PCMs into walls, they ...


Analysis Of Standing Seam Metal Roofs Subjected To Extreme Wind Loads, Yuchao Xia Apr 2022

Analysis Of Standing Seam Metal Roofs Subjected To Extreme Wind Loads, Yuchao Xia

Electronic Thesis and Dissertation Repository

Standing seam metal roof (SSMR) systems are widely used in low-rise buildings. This study aims to understand the behavior of SSMR systems, especially the failure mechanisms, under severe wind loads. Full-scale experiments conducted at Insurance Research Lab for Better Homes make it possible to examine the performance of SSMR systems with realistic dimensions and boundary conditions. The induced loads on the clips could be measured directly. The results show that there is a linear relationship between the wind pressure and clip reaction under low wind pressure (less than 500 Pa). It is found that load sharing among clips changes at ...


A New Generation Of Open-Graded Friction Course For Enhanced Durability And Functionality, Hossam Abohamer Apr 2022

A New Generation Of Open-Graded Friction Course For Enhanced Durability And Functionality, Hossam Abohamer

LSU Doctoral Dissertations

This study aims at (1) enhancing Open Graded Friction Course (OGFC) mixes durability using additives and other by-products; (2) investigating the impacts of selected factors on OGFC pavements seepage characteristics; (3) developing a quantitative tool to model the deterioration in OGFC pavements functional performance; and (4) developing new guidelines of Air Void (AV) content for OGFC for optimum functionality and durability. For the durability objective, eight mixes were prepared with a PG 76-22 binder and two sources of aggregate (i.e., # 78 limestone and # 67 sandstone). Three Warm Mix Additives (WMA), one by-product (i.e., crumb rubber [CR]), and two ...


Investigation Of Groundwater Depletion And Leveel Underseepage With Unstructured-Grid Modeling Approach, Ye-Hong Chen Apr 2022

Investigation Of Groundwater Depletion And Leveel Underseepage With Unstructured-Grid Modeling Approach, Ye-Hong Chen

LSU Doctoral Dissertations

Unstructured grid is a tessellation of geometric shapes in irregular patterns that provides flexibility in grid design for groundwater modeling. However, groundwater modeling is mostly developed with uniform grid tessellation and layer, which could simplify model structure or cause expensive computational costs in high-resolution simulations. Unstructured grid incorporates non-uniform horizontal and non-uniform vertical discretizations providing the capability to replicate complex hydrostratigraphy, capture geologic features that are crucial for groundwater flow simulation, and reduce computational costs while maintaining a high resolution for areas of interest. This study contains three parts to investigate unstructured-grid approach on constructing high-fidelity groundwater models, comparisons with ...