Browsing PhD Dissertations - DO NOT EDIT by Title
Now showing items 241-260 of 273
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SORPTION-MEDIATED CHEMICAL PROCESSES FOR THE VERSATILE TREATMENT OF PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) IN COMPLEX MEDIA
(2020-08-10)In recent years, per- and polyfluoroalkyl substances (PFAS) have gained notoriety due to environmental and health concerns. These molecules are chemically stable which contributes to their persistence in biological systems ... -
Spatial Variability Models And Prediction Analysis Of Soil Properties Using Geostatistics
(Civil & Environmental Engineering, 2014-12)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. ... -
Stabilization Of High Sulfate Soils
(Civil & Environmental Engineering, 2013-10-22)Stabilization of expansive soils using lime and cement has been a favorite technique for practitioners over the years. However, recent heaving and premature pavement failures in lime and cement treated subgrades containing ... -
Staged Construction Modeling Of Large Diameter Steel Pipes Using 3-D Nonlinear Finite Element Analysis
This study investigates the performance of large diameter steel pipes during stage construction. Using this study, metal pipes are designed utilizing existing native soil for embedment around the pipe rather than imported ... -
Statistical Approach To The Development Of A Microscale Model For Estimating Exhaust Emissions Of Light Duty Gasoline Vehicles
(Civil & Environmental Engineering, 2009-09-16)Today, air pollution is taking a growing toll on human health, the environment and the economy, despite decades of efforts to combat it. Although it was once a primary urban phenomenon in industrialized countries, today ... -
STATISTICAL MODELS OF PIPE SERVICE LIFE TOWARDS ARTIFICIAL INTELLIGENCE BASED DECISION SUPPORT
(2020-08-18)In this dissertation, through utilizing various artificial intelligence-based as well as statistical models, an effort has been made to investigate the deterioration of sewer pipes. Once the deterioration rates of sewer ... -
The Strength Of Horizontal Shear Reinforcement With Limited Development
In order for the composite action between the precast beam and the cast-in-place deck to be effective, sufficient horizontal (interface) shear strength needs to be provided at the interface of the two concrete elements to ... -
STRENGTHENING OF LIGHTWEIGHT REINFORCED CONCRETE BEAMS USING CARBON FIBER REINFORCED POLYMERS (CFRP)
(2016-05-20)This research aimed to investigate the effect of utilizing “Fiber Reinforced Polymer” (FRP) on the light weight concrete beams. The main hypothesis is that such utilization of the FRP will lead to strengthened lightweight ... -
STRUCTURAL COMPETENCY AND ENVIRONMENTAL SOUNDNESS OF THE RECYCLED BASE MATERIALS IN NORTH TEXAS
(2017-04-26)Aggregates, which are derived from natural resources, are the most important raw materials used in pavement construction; however, depletion of the natural resources, increasing labor costs, and environmental concerns have ... -
STRUCTURAL PERFORMANCE OF DISTRESSED CAST-IN-PLACE CONCRETE BRIDGE RETAINING WALL
(2021-08-02)Cast-In-Place (CIP) concrete retaining walls have been used in the United States widely in the 20th century. CIP concrete walls have additionally proven to be structurally rigid and cost-effective for low backfill height. ... -
Studies On Field Stabilization Methods To Prevent Surficial Slope Failures Of Earth Fill Dams
(Civil & Environmental Engineering, 2009-09-16)Surficial failures are occurring frequently on the slopes of earthfill dams which are predominantly rainfall induced. Desiccation cracks form on the slope surface during dry environment which accelerates infiltration during ... -
Studies On Volume Change Movements In High PI Clays For Better Design Of Low Volume Pavements
(Civil & Environmental Engineering, 2008-09-17)Numerous low- to medium-volume roads such as Farm Market (FM) roads constructed on expansive clay subgrades, especially in the eastern and central Texas, encounter severe pavement cracking and premature loss of serviceability. ... -
Study of the Impact of Atmospheric Variability on Subsurface Methane Emissions: Application to Leak Detection and Quantification for Underground Natural Gas Pipeline Leaks
(2022-12-09)Natural gas (NG), taken as a bridging fuel for achieving a low-carbon future, has rapidly grown to be a significant component of the global energy system and requires extensive pipeline infrastructures, most of them buried ... -
SUSTAINABILITY ASSESSMENT OF RECYCLED ASPHALT MIXTURES IN TEXAS
(2016-05-13)The pavement practitioners use more recycled materials in asphalt mixtures in order to compensate for the high price of petroleum products and save the limited resources of virgin materials. Reclaimed Asphalt Pavement ... -
Sustainable Ground Improvement Method using Recycled Plastic Pins
(2019-05-14)Failure of civil engineering infrastructures due to insufficient bearing and shearing capacity of the unsuitable foundation soil is a common problem in the area of North Texas which results in significant maintenance issues ... -
Sustainable Slope Stabilization Using Recycled Plastic Pin In Texas
(Civil & Environmental Engineering, 2014-03-12)Shallow slope failures are predominant in the North Texas area and pose significant maintenance problems for the Texas Department of Transportation (TxDOT). As a cost effective alternative, the Recycled Plastic Pin (RPP) ... -
Sustainable Waste Management through Operating Landfill as Biocell
(2018-05-01)Solid waste is being generated at a record pace, and disposal of it requires advanced waste management services at a reasonable cost. Landfilling is the most suitable waste disposal and management technique currently ... -
SWCC And Clay Mineralogy Based Models For Realistic Simulation Of Swell Behavior Of Expansive Soils
(Civil & Environmental Engineering, 2013-07-22)Predicting the volume change behavior of expansive soils has been a major challenge to the engineers in the past few years, due to the intricate couple effects caused by different soil composition parameters toward swelling. ... -
SYNTHESIS OF METAKAOLIN-BASED GEOPOLYMER AND ITS PERFORMANCE AS SOLE STABILIZER OF EXPANSIVE SOILS
(2019-11-26)Expansive soils have been stabilized using conventional soil stabilizers such as lime and cement for many decades. These conventional stabilizers form cementitious productions that enhance the strength properties and reduce ... -
TESTING AND EVALUATION OF POLYMERIC SPRAY APPLIED PIPE LINING IN PRESSURE PIPE APPLICATIONS
(2023-08-30)**Please note that the full text is embargoed until 08/01/2024** Pressure pipes are an important component of pipe infrastructure for water mains, distribution lines, fuel and gas piping, process piping, building services ...