Civil Engineering Commons^™

Investigation Of An Association Between Childhood Leukemia Incidences And Airports In Texas, Sala. Nanyanzi Senkayi, Melanie L. Sattler, Nancy Rowe, Victoria Chen

Civil Engineering Faculty Publications - Archive

As worldwide demand for air travel increases, emissions from airports will likely also increase. Airport emissions pose a concern due to lack of information about their quantity and impacts on human health and the environment. This research aimed to address the question of whether there is an association between childhood leukemia cases and airport emissions in Texas. Rather than looking at the impacts of a single airport on the surrounding community, this study looks at all airports in the state of Texas, and 2 134 incidences of childhood leukemia (children age 9 and under) state–wide over a 10–year period. The …

Effect Of Enhanced Leachate Recirculated (Elr) Landfill Operation And Gas Extraction On Greenhouse Gas Emission, Sonia Samir

Civil Engineering Dissertations - Archive

The bioreactor/ enhanced leachate recirculated (ELR) landfill operation with the addition of moisture/ leachate to the landfill, accelerate the process of landfill waste decomposition; and increase the generation of LFG over a shorter period of time. Since emissions from the landfills are directly related to the gas generation, the increase in gas generation might also increase the emission from the landfill. On the contrary, the presence of gas extraction is suggested to mitigate the fugitive emissions from the landfills. Therefore, the motivation of the current study was to evaluate the effect of ELR operation as well as the gas extraction …

Estimation Of Optimum Compaction Level For Bioreactor Landfill Operation, Dipak Tiwari

Civil Engineering Dissertations - Archive

The effect of compaction on the degradation of MSW is important for the successful operation of bioreactor landfill. It has been a general tendency to compact working face solid waste as much as possible to gain more space. Previous studies has shown moisture content, moisture recirculation and ambient temperature were important components for degradation. There was a limitation on the compaction effect on degradation. Although several studies were conducted in the past to find the hydraulic conductivity of the waste, there was lack of work to find the optimum compaction to achieve sufficient flow inside the landfill and thus to …

Spatial Variability Models And Prediction Analysis Of Soil Properties Using Geostatistics, Tejo Vikash Bheemasetti

Civil Engineering Dissertations - Archive

Soils are composed of solid, water and air phases whose characteristics are highly variable. The interactions of these phases in the soil matrix can lead to different types of topographical formations and characteristics. Due to the uncertainty and complex interactions among these phases, studies on soils have always been a challenging problem for engineers. These variations and uncertainties make it necessary for engineers to adopt new techniques and methods to analyze soil properties in order to determine or interpret their generalized behaviors and patterns. Existing research in variability analysis tends to focus on the distribution of the soil properties, reliability-based …

Evaluation Of Lightweight Geofoam For Mitigating Bridge Approach Slab Settlements, Pinit Ruttanaporamakul

Civil Engineering Dissertations - Archive

The bump at the end of a bridge infrastructure is one of the frequent problems found in Texas and other states. Transportation agencies spend millions of dollars annually to repair the bump problem. The major cause of the problem is the settlement of backfill materials and foundation soils, as well as the erosion of backfill. Research was undertaken at the University of Texas at Arlington to study the embankment located on US 67 over SH 174 in Johnson County, Cleburne, Texas. The embankment was reconstructed, replacing the top of existing fill soil with lightweight EPS 22 geofoam blocks to reduce …

Response Of Unsaturated Silty Sand Over A Wider Range Of Suction States Using A Novel Double-Walled Triaxial Testing System, Ujwalkumar Dashrath Patil

Civil Engineering Dissertations - Archive

In recent decades, the state-of-the-art of our understanding of unsaturated soil performance has been considerably enhanced by incorporating novel and advanced features to the conventional testing devices such as direct shear device, ring shear device, triaxial device and true triaxial device. The novel suction-controlled triaxial system used in this research is fully automated and has enhanced features such as volume change device and double-walled cell to monitor the volume change accurately during all the stages of unsaturated triaxial test. Despite the sophistication, such devices can help in testing mechanical behavior of unsaturated soils only up to matric suction (s) value …

Numerical Modeling Of Ground Movements Associated With Trenchless Box Jacking Technique, Babak Haji Mohammad Hasan Mamaqani

Civil Engineering Dissertations - Archive

The Trenchless Technology (TT) is defined as a family of methods used to install, renew, replace or renovate new pipe/box or existing pipe/box underground with little or no surface disruption. TT is divided into two main categories including Trenchless Construction Methods (TCMs) and Trenchless Renewal Methods (TRMs). TCMs are used to install new utilities and pipes underground while TRMs are used to renew, renovate and replace an existing utility or pipe. Box jacking (BJ) is a TCM used to install rectangular box culverts under existing facilities such as highways and railroads. In this method, box culverts are pushed through the …

Achieving ‘Net Zero Energy’ Performance Through Retrofitting Of Residential Buildings In Ireland., M. Alan Costello

Theses

A Net Zero Energy Building (nZEB) is a residential or commercial building that consumes net zero energy over a set period of time, usually taken as one year. In short, for every unit of energy the building consumes over a year, it must generate a unit of energy to maintain an overall net balance. This is achieved by reducing the operational energy usage to a very low level through energy efficient design, and then providing renewable generation technologies on site to cater for the remaining energy demand.

Energy use in all sectors of society is under scrutiny at present, largely …

A Technical And Economic Appraisal Of Insulation Retrofits, Niamh O'Brien

Theses

The main aim of this literature review is to further develop the project brief and to examine what research has previously been undertaken in the field of thermal conductivity and retrofitting insulation. The basis of this project is to determine the effect of moisture in domestic cavity walls on the effectiveness of retrofitted insulation. The research began by highlighting the reasoning behind the need for insulation within domestic dwellings within Ireland and the guiding legislation in place in relation to this. Carrying on from this, the current methods used to retrofit insulation were examined, along with the types of insulation …

A Technical And Economic Appraisal Of Insulation Retrofits, Niamh O'Brien

Theses

The main aim of this literature review is to further develop the project brief and to examine what research has previously been undertaken in the field of thermal conductivity and retrofitting insulation. The basis of this project is to determine the effect of moisture in domestic cavity walls on the effectiveness of retrofitted insulation. The research began by highlighting the reasoning behind the need for insulation within domestic dwellings within Ireland and the guiding legislation in place in relation to this. Carrying on from this, the current methods used to retrofit insulation were examined, along with the types of insulation …

Evaluation Of Truck Signal Priority At N Columbia Blvd And Martin Luther King Jr. Blvd Intersection: Vissim Micro Simulation Analysis Of Truck Signal Priority, Maisha Mahmud

Civil and Environmental Engineering Master's Project Reports

Given the importance of over growing freight transportation system worldwide, engineers and planners are faced with the challenge of improving freight service in urban area using low cost measure. Truck Signal Priority is one of the strategy that can be used to improve operational efficiency with enhance safety benefits (red light running) of freight service, without major capital investment. In light to this interest this study focus on evaluating the impacts of freight signal priority on a high truck density intersection like N Columbia Blvd and NE Martin Luther King Jr. Blvd. Using a simulation tool, VISSIM, these impacts were …

Numerical Evaluation Of The Extended Endplate Moment Connection Subjected To Cyclic Loading, Mehdi Ghassemieh, Mehdi Jalalpour, Ali Akbar Gholampour

Civil and Environmental Engineering Faculty Publications

In this paper, the seismic behaviour of extended endplate moment connection is analysed using finite element method (FEM). First, an existing test setup is modelled and analysed using ANSYS computer program. The model is validated by comparing the results from the finite element with the experimental ones. Afterwards, by changing the dimensions of members of the connection, their effect on the overall seismic performance of connection is investigated. The results show that by enlarging the column depth and stiffening the connection, the seismic performance is improved and the thickness of endplate should be chosen in a way that its moment …

Acoustic Properties Of Concrete Panels With Crumb Rubber As A Fine Aggregate Replacement, Niall Holmes, Alex Browne, Christopher Montague

Articles

This paper presents the acoustic performance of small scale crumb rubber concrete (CRC) panels in terms of the sound absorbance and insulation at low (63, 125, 250 & 500 Hz) and high (1000, 2000, 4000 and 5000 Hz) frequencies. Acoustic tests were conducted with differing levels of fine aggregate replacement with crumb rubber (7.5 and 15%) with four different grades following freezing and heating. Analysis of the workability, compressive strength and density are also presented. The results found that CRC performed well in terms of sound absorbance particularly with higher proportions (15% here) and grades of crumb rubber. As an …

Civil Engineering Accreditation Document 2013 (Revised 2014), Georgia Southern University Libraries

Program Accreditation Reports (2013-2023)

This is the revised 2013 report for 2014.

Concession Analysis For Highway Infrastructure Projects Financed As Public-Private Partnerships, Tanaphat Jeerangsuwan

Open Access Dissertations

Public funds allocated to the improvement and maintenance of highway infrastructure have reached the limits due to a rapid rate of socioeconomic growth and deterioration in infrastructure system performance. A public-private partnership (PPP) concessions a contractual and project financing mechanism that helps public authorities lessen the impact of their limited financial resources. In this project financing scheme, a public authority enters into a partnership with a private concessionaire for the purpose of developing a specific infrastructure facility. In return, the concessionaire receives the right to operate for a specified period of time. This creates strong potential for the delivery of …

Methods For Estimating Sediment Yield And Dam Capacity In The Great Lakes Watershed, Jennifer Hui

Wayne State University Theses

Sedimentation is the most important factor in the longevity of dams built in the United States. As most dams are reaching their capacity for sediment storage, this study investigated the historical and predicted future rates of sediment accumulation as well as the remaining storage capacity. This study examined the mechanisms influencing sediment production and storage in the watershed to provide future insight regarding potential control of this process. Twelve reservoirs throughout the Great Lakes watershed were selected and analyzed for their greater applicability to the entire watershed. Both historic and new data were collected on these dams to determine how …

Measurements Of Fluvial Sediments Using A Single-Frequency Acoustic Attenuation System, Thomas Alexander Kajdan

Electronic Theses and Dissertations

Suspended sediments are a global-scale pollutant that threaten the integrity of our waterways and pose an environmental threat to many aquatic ecosystems. Innovative techniques are required to continuously monitor this pollutant. Ultrasonic acoustic measurements have the potential to improve the temporal resolution of fluvial sediment data. This work investigates the use of a prototype field grade single-frequency acoustic attenuation system that was developed at the National Center for Physical Acoustics (NCPA), located at the University of Mississippi. This field-deployable unit consists of two 20 MHz immersion transducers that are aligned in a "pitch-catch" configuration at a fixed distance of 18 …

Comparison Of Costs Of Personal Protective Equipment For All Workers To Avoid Costs Of Fall Accidents, Sultan Noori Al-Karawi

Masters Theses

"The construction industry is one of the most important industries in the United States. It is the biggest contributor in the growth of the U.S. economy. Despite the great achievements and prominent role for this sector in the U.S. economy, the construction industry is suffering from neglect and dereliction by related government institutions and private companies. This neglect led to formation of a negative image about the construction industry that has caused a deep impact in productivity and economic growth. One of the reasons is a high percentage of accidents that occur within the construction industry which leads to injuries …

Two Driven Pile Load Tests For Use In Missouri Lrfd Guidelines, Matthew Garry Stuckmeyer

Masters Theses

"A static pile load test program was initiated by the Missouri Department of Transportation (MoDOT) to evaluate the use of pile load tests in Missouri LRFD guidelines. The program's approach involves two phases to achieve the appropriate levels of reliability for driven piles in the state of Missouri. This thesis focuses on the data collection efforts of Phase 1. Two quick static pile load tests were performed to failure on test piles in the Southeast Lowlands geologic region of Missouri. The piles were dynamically monitored during installation and subsequent restrike tests performed. The results of the static and dynamic pile …

Shear Behavior Of High Strength Self-Consolidating Concrete In Nu Bridge Girders, Alexander Michael Griffin

Masters Theses

"As the nation's infrastructure continues to age, advanced concrete technologies have been developed to both reduce a structure's costs and increase its life expectancy. Since the early 1990's, self-consolidating concrete (SCC) has been one of these technologies. Many, however, have been reluctant to implement SCC in highway girders due to the mixture constituents. One of these concerns is the reduced content and size of the coarse aggregate. These differences in the concrete potentially hinder SCC's mechanical properties and shear resistance. Additionally, for high strength concretes (HSC) with weaker aggregates, shear cracks tend to propagate through the coarse aggregate, reducing the …