Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Transportation Engineering (5)
- Construction Engineering and Management (4)
- Environmental Engineering (3)
- Hydraulic Engineering (2)
- Other Civil and Environmental Engineering (2)
-
- Structural Engineering (2)
- Communication (1)
- Communication Technology and New Media (1)
- Computational Engineering (1)
- Computational Linguistics (1)
- Computer Engineering (1)
- Computer and Systems Architecture (1)
- Digital Communications and Networking (1)
- Linguistics (1)
- Social Justice (1)
- Social and Behavioral Sciences (1)
- Urban Studies and Planning (1)
- Keyword
-
- Machine learning (7)
- Rutting (6)
- Sustainability (6)
- Condition assessment (5)
- Finite element analysis (5)
-
- Life cycle assessment (5)
- Recycled plastic pins (5)
- ABAQUS (4)
- Liquefaction (4)
- Pavement (4)
- Shear strength (4)
- Asset management (3)
- Bearing capacity (3)
- Concrete pipes (3)
- Corrosion (3)
- Cracking (3)
- Environmental impact (3)
- FEM (3)
- FRP strengthening (3)
- Infrastructure (3)
- Landfill (3)
- Load testing (3)
- Modified moisture barrier (3)
- Pavements (3)
- Plastic road (3)
- Prediction (3)
- Prediction model (3)
- Prediction models (3)
- Regression analysis (3)
- SimaPro (3)
- Publication Year
- File Type
Articles 91 - 120 of 302
Full-Text Articles in Civil Engineering
Utilizing Load Tests And Site Investigation Data To Predict Design Load Capacities For Drilled Shafts In Different Geologic Formations, Hosam Salman
Civil Engineering Dissertations - Archive
Precise predictions of the design capacities of drilled shafts on weak rock formations is vital for a better design of foundations. Irregularities in rock formations due to weathering cause discrepancies in actual bearing capacities and evaluating the bearing capacity typically requires frequent in-situ testing, using load test shafts at smaller intervals, which is time consuming and expensive. The typical design in Texas currently utilizes in-situ design charts that are developed based on Texas Cone Penetrometer (TCP) blow counts. This approach is found to have limitations related to maximum number of blows, rock characterization, and difficulty in incorporating influential parameters. Problematic …
A New Geothermal Bridge De-Icing System With Attached Hydronic Heating Loops: Field Tests, Numerical Modeling, And Economic Assessment, Omid Habibzadeh Bigdarvish
A New Geothermal Bridge De-Icing System With Attached Hydronic Heating Loops: Field Tests, Numerical Modeling, And Economic Assessment, Omid Habibzadeh Bigdarvish
Civil Engineering Dissertations - Archive
Each year, ice and snow adversely impact U.S. transportation infrastructure during the cold season, causing an extensive impact on the U.S. economy. Bridges are key elements in the transportation network and the most vulnerable sections of the road to ice and snow. Conventional snow and ice removal system (CSRS) is proven not to be a satisfactory solution as it causes induced damages and issues, such as accelerating bridge deck corrosion, safety issues, travel delays, and environmental damages. Thus, the geothermal heat pump de-icing system (GHDS) is introduced as a sustainable solution for bridge deck de-icing, which utilizes renewable geothermal energy …
Reusing Of Recycled Plastic As Pavement Base And Sub-Base Materials, Tanvir Imtiaz
Reusing Of Recycled Plastic As Pavement Base And Sub-Base Materials, Tanvir Imtiaz
Civil Engineering Dissertations - Archive
A large percentage of waste materials is recycled back into the same product from which they originated. In spite of considerable progress in recycling waste materials generated in urban environments, the materials are sometimes not able to be recycled into the same product due to their quality or technical requirements and are as a result dumped or incinerated. Recycling concrete aggregate (RCCA) and recycled waste plastics are examples of recycled materials that can be used as an alternative to natural aggregates during the construction of newer structures as well as demolition of existing structures like buildings, bridges, and pavements. Materials …
Causes Of Driver Distraction And Incidents At Signalized Intersections, Zannatulferdous Labony
Causes Of Driver Distraction And Incidents At Signalized Intersections, Zannatulferdous Labony
Civil Engineering Dissertations - Archive
Driver distraction causes a major portion of motor vehicle crashes because distractions turn the driver’s attention away from driving the driving task, Intersections represent high risk environments because many conflict points within the intersection exist. At intersections with signalized traffic control, drivers may be more likely to become distracted than at other intersections. While distraction during the red indication may not seem to be a significant concern, this study investigates the role distraction plays in crashes at signalized intersections. Using the SHRP2 naturalistic driving study data, this study focuses on investigating the frequency and types of driver distraction, the causes …
Development Of Non-Prestressed Uhp-Frc Girders For Long-Span Bridges With Dcsr Design Concept And Collapse Assessment Of Smfs With Calibrated Rc And Uhp-Frc Columns Based On Full-Scale Experiments, Seyed Missagh Shamshiri Guilvayi
Development Of Non-Prestressed Uhp-Frc Girders For Long-Span Bridges With Dcsr Design Concept And Collapse Assessment Of Smfs With Calibrated Rc And Uhp-Frc Columns Based On Full-Scale Experiments, Seyed Missagh Shamshiri Guilvayi
Civil Engineering Dissertations - Archive
The work presented here is divided in two parts. This summary includes two paragraphs, each summarizing the topics presented in this dissertation. Ultra-high-performance fiber-reinforced concrete (UHP-FRC) is an emerging material and revolutionarily utilize its mechanical properties can offer a new way to design conventional precast prestressed concrete girders. Its ultra-high compressive strength (> 20 ksi) accompanying by exceptional compressive ductility with a maximum useable compressive strain of 0.015–0.03 allow designers to use higher amount of reinforcement. Current design codes (ACI 318 Building Code and AASHTO LRFD Bridge Design Specifications), limits the maximum useable compressive strain, εcu, to 0.003 for conventional …
Development Of A Model To Prioritize Inspection And Condition Assessment Of Gravity Sanitary Sewer Systems, Karthikeyan Loganathan
Development Of A Model To Prioritize Inspection And Condition Assessment Of Gravity Sanitary Sewer Systems, Karthikeyan Loganathan
Civil Engineering Dissertations - Archive
Underground utilities and wastewater collection systems deteriorate over time demanding utility owners to involve in continuous revisions and development of their asset management frameworks to maintain the functionality of their assets. In any asset management framework, inspection of an asset and respective condition assessment plays a vital role in successful operation and maintenance of systems. In the United States, closed-circuit television (CCTV) is the commonly used device for inspecting the inner environment of sewer pipes, which considering the large length of pipe inventory in a city, is a relatively expensive and time-consuming process. Therefore, inspection of every individual sanitary sewer …
Structural Performance Of Distressed Cast-In-Place Concrete Bridge Retaining Wall, Karzan Ms Habeeb
Structural Performance Of Distressed Cast-In-Place Concrete Bridge Retaining Wall, Karzan Ms Habeeb
Civil Engineering Dissertations - Archive
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. This type of wall is also sustainable with design service life of 75 years (TxDOT 2014). However, during service, the wall undergoes distressed movements, structural deficiency, and stability related problems. CIP cantilever concrete retaining walls often do not perform as expected, and the walls are affected by construction and/or structural deficiency, which sometimes leads to failure. The current study was inspired by distressed CIP walls located on …
Modeling Of Hydrogen Sulfide Generation And Rates Of Microbial Induced Concrete Corrosion In Manhole Shafts, Sunakshi Hada
Modeling Of Hydrogen Sulfide Generation And Rates Of Microbial Induced Concrete Corrosion In Manhole Shafts, Sunakshi Hada
Civil Engineering Dissertations - Archive
Manhole shafts can undergo infrastructure failure due to microbially induced concrete corrosion (MICC). Deterioration of the sewer systems by MICC process occurs due to the volatilization of hydrogen sulfide into the gas phase. The volatized hydrogen sulfide gas reacts with oxygen to form sulfuric acid, resulting in concrete corrosion. If optimum conditions are present, 24 mm of concrete loss can occur in 31 months, and the cost of fixing can range from $10-$30 per square foot. Also, if the manholes are not properly maintained, they can cause serious safety hazards, such as manhole lids falling through the structure, streets giving …
Effectiveness Of Recycled Plastic Pin For Improving Bearing Capacity Of Embankment Over Soft Soil, Md Azijul Islam
Effectiveness Of Recycled Plastic Pin For Improving Bearing Capacity Of Embankment Over Soft Soil, Md Azijul Islam
Civil Engineering Dissertations - Archive
Construction of embankment over soft foundation soils is incredibly a challenging task due to the risk of bearing failure and excessive settlement of foundation soil. Most of the available conventional methods for addressing these problems are either expensive or time-consuming or both. Therefore, research has been striving to develop a sustainable alternative to the current conventional methods. A noble approach to improve the soft foundation soil could be the use of Recycled Plastic Pins (RPP) in combination with geosynthetics. The load transfer efficiency of a geosynthetic-reinforced and RPP supported embankment is influenced by interactions among embankment fill, geosynthetics, and foundation …
Development And Comparison Of Prediction Models For Sanitary Sewer Pipes Condition Assessment Using Multinomial Logistic Regression And Artificial Neural Network., Daniel Ogaro Atambo
Development And Comparison Of Prediction Models For Sanitary Sewer Pipes Condition Assessment Using Multinomial Logistic Regression And Artificial Neural Network., Daniel Ogaro Atambo
Civil Engineering Dissertations - Archive
Sanitary sewer pipes infrastructure system in good condition is essential in providing safe conveyance of the wastewater from homes, businesses, and industries to the wastewater treatment plants. For sanitary sewer pipes to deliver the wastewater to the treatment plants, they must be in good condition. Most of the water utilities have aged sanitary sewer pipes. Water utilities inspect sewer pipes to decide which segments of the sanitary sewer pipes need rehabilitation or replacement. The process of inspecting the sewer pipes is described as condition assessment. This condition assessment process is costly and necessitates developing a model that predicts the condition …
Performance Of Recycled Plastic Pins For Increasing Bearing Capacity Of Foundation Soil, Faria Fahim Badhon
Performance Of Recycled Plastic Pins For Increasing Bearing Capacity Of Foundation Soil, Faria Fahim Badhon
Civil Engineering Dissertations - Archive
Mechanically Stabilized Earth (MSE) walls constructed on unsuitable foundation soil are prone to large deformation and bearing capacity failure. A variety of techniques can be applied to address this issue, such as removal and replacement of existing soil with competent soil, staged construction, dynamic compaction, stone columns, geosynthetic reinforcement. One common traditional approach followed by Texas Department of Transportation (TxDOT) for the improvement of unsuitable foundation soil is removal of the in-situ soil and replacement with suitable fill material. However, this method can be time-consuming and expensive. A pile-supported system in combination with geosynthetic reinforcement can provide a sustainable solution …
Photocatalytic And Photochemical Decomposition Of Various Per- And Polyfluoroalkyl Substances (Pfas) In Water, Nusrat Chowdhury
Photocatalytic And Photochemical Decomposition Of Various Per- And Polyfluoroalkyl Substances (Pfas) In Water, Nusrat Chowdhury
Civil Engineering Dissertations - Archive
Per- and polyfluoroalkyl substances (PFAS) are anthropogenic compounds comprised of a perfluoroalkyl backbone and a terminal functional group. Their detrimental health effects of in humans, like other halogenated chemicals, have been well documented and thus the frequent occurrence of PFAS in the water environment is a recent global concern. After US Environmental Protection Agency (EPA) released a drinking water health advisory for the two most detected long chain PFAS (such as perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS)), industrial production and application of short chain PFAS continues to rise. Feasible and sensible treatment strategies are in dire need for environmental …
Modeling Capacity: Multiple Weaving Areas, Sheida Khademi
Modeling Capacity: Multiple Weaving Areas, Sheida Khademi
Civil Engineering Dissertations - Archive
Systematic, well-designed research provides the most effective approach to the solution of many problems facing highway administrators and engineers. Traffic congestion on freeway systems is one significant concern in urban areas throughout the U.S.A. In this era, building new freeways to reduce congestion is less feasible due to the high capital and social costs. Thus, the effective management and operation of existing freeway facilities has become a preferred approach to reduce traffic congestion. A weaving section is a common design on major highway facilities that always has been an interest to researchers. Weaving areas are characterized by frequent lane changes, …
Mechanical Response Of Chemically Treated Sulfate-Rich Clay Under Multiple Triaxial Stress Path, Azadeh Asghariastaneh
Mechanical Response Of Chemically Treated Sulfate-Rich Clay Under Multiple Triaxial Stress Path, Azadeh Asghariastaneh
Civil Engineering Dissertations - Archive
Expansive clayey soils, which are abundant in arid and semi-arid areas, including the state of Texas, can lead to excessive distress in pavements, foundations, embankments, earth retaining systems and other civil infrastructure that is either made of or supported by this type of soils. Calcium-based stabilizers, such as lime, cement and fly ash, have become popular soil stabilizers due to their ready availability and relatively low cost; however, myriad cases of failures of pavements and foundation built over sulfate-rich treated clay have led researchers to search for more efficient substitutes for calcium-based stabilizers. A very limited number of studies, however, …
Effect Of Modified Moisture Barrier In Mitigating Pavement Distresses Due To Expansive Subgrade, Pratibha Pandey
Effect Of Modified Moisture Barrier In Mitigating Pavement Distresses Due To Expansive Subgrade, Pratibha Pandey
Civil Engineering Dissertations - Archive
Surficial distresses in roadways of Texas are very common due to presence of high plastic clayey soil in the subgrade. Increased sensitivity of high plastic clay towards seasonal moisture change results in repeated swelling and shrinkage, and ultimately the development of pavement cracks. Annual expenses of such distresses impose huge financial liability to maintenance authorities. Studies have indicated rainwater intrusion into underlying expansive subgrade soil coupled with inadequate drainage as the main cause of pavement damage in semi-arid regions. The inability of drainage layer to laterally drain the excess moisture may lead to moisture accumulation within the base layer which …
Evaluation And Retrofitting Of Prestressed Concrete Girder Bridge With Excessive Vibration, Ikram Hasan Efaz
Evaluation And Retrofitting Of Prestressed Concrete Girder Bridge With Excessive Vibration, Ikram Hasan Efaz
Civil Engineering Dissertations - Archive
Vibration of a highway bridges is a serviceability issue according to American Association of State Highway and Transportation Officials (AASHTO). Though vibration is one of the primary reasons of bridge deck cracking, AASHTO only has a deflection limit to counterpart vibration which is not adequate according to many researchers. For instance, SH-75 SB Bridge over Wilson Creek in McKinney, Texas was observed to have excessive vibration and cracking on the concrete deck. To evaluate the condition of the bridge, Ground Penetrating Radar (GPR) and Impact Echo (IE) were used on the deck as Non-Destructive Evaluation (NDE) methods. A diagnostic load …
An Analytical, Numerical, And Experimental Study Of Automated Damage Assessment For Concrete Structures, Sanggoo Kang
An Analytical, Numerical, And Experimental Study Of Automated Damage Assessment For Concrete Structures, Sanggoo Kang
Civil Engineering Dissertations - Archive
This dissertation presents the automated damage assessment studies for concrete structure. Three major studies are performed to: 1) understand the theoretical wave scattering model to evaluate the internal vertical crack, 2) to validate the theoretical wave scattering model through FE simulations with experimental measurements, and 3) to advance practical automated crack evaluation (ACE) system for vertical crack and delamination detection. Firstly, singular integral solutions are studied to investigate scattering of Rayleigh waves by subsurface cracks. Defining a wave scattering model by objects, such as cracks, still can be quite a challenge. The model’s analytical solution uses five different numerical integration …
A Comprehensive Framework To Mitigate Surficial Slope Failures, Burak Boluk
A Comprehensive Framework To Mitigate Surficial Slope Failures, Burak Boluk
Civil Engineering Dissertations - Archive
Each year, numerous highway and dam slopes that are built with high plasticity clays experience shallow slope failures. Besides the high maintenance and repair costs, these failures negatively impact the public life by interrupting the traffic flow and causing serious safety hazards. The development of desiccation cracks due to weathering cycles deteriorates hydro-mechanical properties of soil, increases water infiltration, and ultimately results in surficial slope failure. Several slope rehabilitation methods have been developed to stabilize clayey soil slope sections affected by surficial failures. Lime stabilization is an effective treatment method that generally reduces the swell-shrink potential of expansive soil and …
Evaluation Of Recycled Plastic Pins As Shear Keys In Mse Wall Base, Prabesh Bhandari
Evaluation Of Recycled Plastic Pins As Shear Keys In Mse Wall Base, Prabesh Bhandari
Civil Engineering Dissertations - Archive
Mechanically Stabilized Earth (MSE) walls have been widely used as retaining structures due to their flexible nature, a better tolerance against differential settlement, and many other factors. However, external stability problems of MSE walls have been an issue in North Texas over decades. Lateral displacement of the wall occurs, giving rise to sliding failure, when there is insufficient shear strength at the wall base to produce adequate frictional resistance. Such failures can cause significant maintenance, repair, and cost implications for the state department of transportation. Furthermore, MSE walls also undergo global failure due to weak soil conditions along with high …
Improving Operational Hydrologic Forecasting Via Conditional Bias-Penalized Multi-Sensor Precipitation Estimation And Multi-Model Streamflow Prediction, Ali Jozaghi
Civil Engineering Dissertations - Archive
Many multivariate analysis techniques involve minimizing mean square error (MSE) or error variance under unbiasedness. In the presence of observation error, variance minimization tends to introduce negative and positive biases, or conditional bias (CB), over the upper and lower tails of the predictands, respectively. This work describes and evaluates three multivariate merging techniques, 1) adaptive conditional bias-penalized cokriging (CBPCK), 2) conditional bias-penalized Multiple Linear Regression (CBP-MLR), and 3) conditional bias-penalized Bayesian Model Averaging (CBP-BMA) which implements CBP-MLR in place of MLR. CBPCK and CBP-MLR minimize a linearly weighted sum of errors squared and the sum of the Type-II error squared, …
Laboratory Tests And Numerical Model Of Geothermally Heated Bridge Deck With Attached Hydronic Loop, Teng Li
Laboratory Tests And Numerical Model Of Geothermally Heated Bridge Deck With Attached Hydronic Loop, Teng Li
Civil Engineering Dissertations - Archive
An accumulation of ice and snow on pavement slabs and bridge decks always adversely impacts driving conditions and results in motorist accidents. The use of the more popular deicing methods, including plowing, salting, and sanding, is limited by their relatively high cost for materials, fuel, maintenance, and labor. Geothermal energy, which is considered a renewable, sustainable, clean (i.e., zero carbon emission), and directly used energy source, has been successfully applied to bridges and pavements for deicing. However, existing geothermal bridge and pavement deicing designs are primarily employed for new bridges where hydronic loops, which are considered internal heating, are embedded …
Development Of Deterioration Models For Street Pavement In Dallas-Fort Worth Metroplex, Mladjan John Grujicic
Development Of Deterioration Models For Street Pavement In Dallas-Fort Worth Metroplex, Mladjan John Grujicic
Civil Engineering Dissertations - Archive
Accurate prediction of pavement deterioration is vital for an efficient and cost-effective allocation of available budgets for keeping an agency’s road networks operating at a desirable level. Currently, most cities in the Dallas-Fort Worth Metroplex area are using the software PAVERTM and the associated performance models to predict future conditions as they do not have available reliable prediction models. However, the problem with this type of modeling is that the models are not calibrated to local conditions. The Pavement Deterioration Prediction models that have been developed in this research will help any pavement management agencies within DFW Metroplex area to …
Use Of Time-Domain Reflectometry To Characterize Thermal And Hydraulic Properties Of Unsaturated Sands, Xuelin Wang
Use Of Time-Domain Reflectometry To Characterize Thermal And Hydraulic Properties Of Unsaturated Sands, Xuelin Wang
Civil Engineering Dissertations - Archive
Unsaturated soil is an essential consideration for many geotechnical engineering fields, for example, soil bearing capacity, soil lateral earth pressure, slope stability analysis, and seepage-related problems. Thermal-hydro-mechanical (THM) processes govern the behavior of unsaturated soils. Therefore, it is critical to simultaneously measure soil moisture, density, and thermal properties to better study THM processes. A thermo-time-domain reflectometry (thermo-TDR) sensor, a dual-probe for both soil moisture and thermal properties, is improved (based on its previous design) and fully calibrated through various soils at different soil moisture circumstances. Nine different chemical reagents with known dielectric constant were utilized to perform calibration of the …
Evaluation Of The Use Of Anchorage Systems For Strengthening Concrete Members Reinforced By Fiber-Reinforced-Polymer (Frp) Laminate, Mai Abd Alrhman Alrhman Aljaberi
Evaluation Of The Use Of Anchorage Systems For Strengthening Concrete Members Reinforced By Fiber-Reinforced-Polymer (Frp) Laminate, Mai Abd Alrhman Alrhman Aljaberi
Civil Engineering Dissertations - Archive
An anchorage system is the most effective method for preventing or delaying the debonding of fiber-reinforced polymer laminates; however, despite extensive studies, the related design information is still unclear and limits its use. The goal of this research, therefore, is to investigate the parameters that affect the debonding strain of CFRP beams secured with different types of anchors. For this purpose, 34 small-scale beams were tested under four-point loading. Two (2) of them were control beams (no FRP, no anchors), 8 were strengthened with FRP at their tension sides, and the remaining 24 were secured with different types of anchor …
Improving Flood Forecasting Using Conditional Bias-Aware Assimilation Of Streamflow Observations And Dynamic Assessment Of Flow-Dependent Information Content, Haojing Shen
Civil Engineering Dissertations - Archive
Accurate forecasting of floods is a long-standing challenge in hydrology and water management. Data assimilation (DA) is a popular technique used to improve forecast accuracy by updating the model states in real time using the uncertainty-quantified actual and model-simulated observations. A particular challenge in DA concerns the ability to improve the prediction of hydrologic extremes, such as floods, which have particularly large impacts on society. Almost all DA methods used today are based on least squares minimization. As such, they are subject to conditional bias (CB) in the presence of observational uncertainties which often leads to under- and over-prediction of …
Durability And Prediction Of Long-Term Performance Of Carbon Fiber Reinforced Polymer (Cfrp) Laminates Under Environmental Conditions, Eyad Alsuhaibani
Durability And Prediction Of Long-Term Performance Of Carbon Fiber Reinforced Polymer (Cfrp) Laminates Under Environmental Conditions, Eyad Alsuhaibani
Civil Engineering Dissertations - Archive
Strengthening deteriorated concrete structures with carbon fiber reinforced polymer (CFRP) has been widely validated through laboratory experiments and field tests. Questions and concerns persist related to the CFRP’s long-term performance and service life, however, thus the main objective of this research was to evaluate its durability under various environmental conditions. This research is divided into four distinct phases. In the first phase, the deterioration trends of CFRP laminate under environmental regimes were evaluated after immersion in water at 23, 45, and 60 °C for periods up to 32 weeks. In the second phase, four prediction models of the long-term performance …
Sorption-Mediated Chemical Processes For The Versatile Treatment Of Per- And Polyfluoroalkyl Substances (Pfas) In Complex Media, Naomi Gevaerd De Souza
Sorption-Mediated Chemical Processes For The Versatile Treatment Of Per- And Polyfluoroalkyl Substances (Pfas) In Complex Media, Naomi Gevaerd De Souza
Civil Engineering Dissertations - Archive
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 and their increased detections in surface waters. Treatment of highly persistent PFAS has been a challenging but significant task. The most practical technique for removal of PFAS is through adsorption onto granular activated carbon (GAC) or other novel materials. Meanwhile, PFAS are resistant to simple oxidation, and although decomposition of specific PFAS has been reported through advanced oxidation technologies, often energy-intense technologies capable of generating electrons such as ultraviolet radiation, …
Transient Seepage And Slope Stability Analysis In Partially Saturated Earthen Dam, Puneet Bhaskar
Transient Seepage And Slope Stability Analysis In Partially Saturated Earthen Dam, Puneet Bhaskar
Civil Engineering Dissertations - Archive
The problem of slope stability in earthen dams is a major concern to geotechnical engineers. Traditionally, the seepage through embankments and other geotechnical structures is estimated using hydraulic properties of saturated soil. In most of the cases, the soil is not fully saturated and use of saturated soil properties can lead to erroneous results. The reliable assessment of slope stability needs comprehensive characterization of both unsaturated and saturated hydraulic properties of soil. The coefficient of permeability is a key hydraulic property in solving any flow related problem in geotechnical engineering. The permeability coefficient of unsaturated soil is usually estimated using …
Development Of A Structural Design Methodology For Polymeric Spray Applied Pipe Linings, Zahra Kohankar Kouchesfehani
Development Of A Structural Design Methodology For Polymeric Spray Applied Pipe Linings, Zahra Kohankar Kouchesfehani
Civil Engineering Dissertations - Archive
Buried culverts are important components of the highway infrastructure. Most large culverts are built decades ago from corrugated metal or reinforced concrete materials and now have reached their design lives. Trenchless renewal techniques can be utilized to enhance load carrying capacity of the existing deteriorated culverts and provide them a new design life. Spray applied pipe lining (SAPL) is a trenchless renewal methodology to renew damaged pipes and culverts by applying layers of liner on the interior surface of the deteriorated host culvert. The development of practical spray applied pipe linings could be of enormous benefit to the Departments of …
Development Of Reductive/Oxidative Treatment Strategy For The Removal Of Per- And Polyfluoroalkyl Substances (Pfas) In Water, Akshay Parenky
Development Of Reductive/Oxidative Treatment Strategy For The Removal Of Per- And Polyfluoroalkyl Substances (Pfas) In Water, Akshay Parenky
Civil Engineering Dissertations - Archive
The detrimental health effects of halogenated compounds in humans has been well documented, and the frequent occurrence of per- and polyfluoroalkyl substances (PFAS) in the water environment is a recent global concern. Feasible and sensible treatment strategies are in dire need for environmental remediation and water treatment. Currently, efficient treatment is only obtained at a small scale and at a high energy cost. This research is presented in three subsections, where decomposition of selected PFAS was evaluated under advanced oxidation techniques. The first study involved decomposition of a polyfluoroalkyl substance, 6:2 fluorotelomer sulfonate (6:2 FTS), in which 2 carbons of …