Civil Engineering Commons^™

Cracking Potential And Temperature Sensitivity Of Metakaolin Concrete, Andrew Robert Williams

USF Tampa Graduate Theses and Dissertations

Metakaolin is a pozzolanic material with the potential to reduce permeability and chloride ingress; however, quantification of the effects of metakaolin use on the cracking sensitivity of concrete mixtures is needed to ensure that these improvements in performance are not compromised. This study was conducted to investigate the early age cracking potential due to restraint stresses from incorporating metakaolin in concrete. Calorimetry testing showed that metakaolin was more sensitive to temperature than mixtures with only Portland cement. Results showed more shrinkage, less stress relaxation, and higher restraint stress from the inclusion of metakaolin, potentially increasing cracking sensitivity of mixtures.

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Bridge End Settlement Evaluation And Prediction, Jiwen Zhang, Timothy R. Taylor, Roy E. Sturgill

Kentucky Transportation Center Research Report

A bridge approach is usually built to provide a smooth and safe transition for vehicles from the roadway pavement to the bridge structure. However, differential settlement between the roadway pavement that rests on embankment fill and the bridge abutment built on more rigid foundation often creates a bump in the roadway. Previous work examined this issue at a microscopic level and presented new methods for eliminating or minimizing the effects at specific locations.

This research studies the problem at a macroscopic level by determining methods to predict settlement severity; this assists designers in developing remediation plans during project development to …

Assessment Of Shear Prediction Models For Seismic Loss Estimation Of Concrete Buildings, Bashir Mohamed Ayman Al Murad

Civil and Environmental Theses

No abstract provided.

How Acoustics In California High Performance Schools Relate To Student Achievement, Devin K. Wong

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

This research project seeks to determine if students attending K–12 schools meeting a minimum standard of high performance classroom conditions in the state of California do evidence higher scholastic achievement, based on publically available results on state-wide standardized tests. In three phases, a subset of 200+ schools applying for grants dedicated to building high performance schools over the past decade was correlated with an existing database of achievement scores for all public schools in California. The criteria utilized to specify high performance classrooms was provided by the California High Performance Initiative (HPI) Grant program. Academic achievement was evaluated on a …

Modeling Factors Contributing To Injury And Fatality Of Run-Off-Road Crashes In Ohio, Deogratias Eustace, Omar Eid Almutairi, Peter W. Hovey

Civil and Environmental Engineering and Engineering Mechanics Faculty Publications

The main objective of this study was to determine the factors that contribute significantly to the levels of injury severity when run-off-road (ROR) crashes occur. This study used a 5-year crash data for years 2008 - 2012 from the state of Ohio. The decision tree model in conjunction with generalized ordered logit model was used to investigate characteristics of injury and fatality of run-off-road crashes in Ohio.

The decision tree modeling was used for exploratory data analysis identified eight factors that explain a large amount of the variation in the response variable, injury severity. These predictor variables include road condition, …

Altered Antibiotic Tolerance In Anaerobic Digesters Acclimated To Triclosan Or Triclocarban, Daniel Elliott Carey, Patrick J. Mcnamara

Civil and Environmental Engineering Faculty Research and Publications

Bench-scale anaerobic digesters were amended to elevated steady-state concentrations of triclosan (850 mg/kg) and triclocarban (150 mg/kg) using a synthetic feed. After more than 9 solids retention time (SRT) values of acclimatization, biomass from each digester (and a control digester that received no antimicrobials) was used to assess the toxicity of three antibiotics. Methane production rate was measured as a surrogate for activity in microcosms that received doses of antibiotics ranging from no-antibiotic to inhibitory concentrations. Biomass amended with triclocarban was more sensitive to tetracycline compared to the control indicating synergistic inhibitory effects between this antibiotic and triclocarban. In contrast, …

Anaerobic Digester Bioaugmentation Influences Quasi Steady State Performance And Microbial Community, Kaushik Venkiteshwaran, K. Milferstedt, J. Hamelin, Daniel Zitomer

Civil and Environmental Engineering Faculty Research and Publications

Nine anaerobic digesters, each seeded with biomass from a different source, were operated identically and their quasi steady state function was compared. Subsequently, digesters were bioaugmented with a methanogenic culture previously shown to increase specific methanogenic activity. Before bioaugmentation, different seed biomass resulted in different quasi steady state function, with digesters clustering into three groups distinguished by methane (CH₄) production. Digesters with similar functional performance contained similar archaeal communities based on clustering of Illumina sequence data of the V4V5 region of the 16S rRNA gene. High CH₄ production correlated with neutral pH and high Methanosarcina abundance, whereas …

Evaluating Soil Properties And Cyclic Loading Effects Of Florida’S Clayey Silty Fine Sand Soils Associated With High Pile Rebound, Ali Fadil M. Omar

Theses and Dissertations

Throughout the state of Florida, pile rebound has been encountered while driving large displacement piles. During periods of excessive rebound, the piles could not achieve further penetration and could require an excessive number of blows to advance the pile into the ground. This phenomenon affecting pile driving is called high pile rebound producing construction delays, higher costs; and may lead to pile damage. A comprehensive experimental program was performed involving the characterization and identifications of the typical soils properties associated with high pile rebound during pile installation. The research focuses on the determination of the relationships between high and no-rebound …

Time Dependent Effect Of Drilling Slurries On Side Shear Resistance Of Drilled Shafts, Warren Allen

USF Tampa Graduate Theses and Dissertations

Drilled shafts are cylindrical deep foundations constructed by casting fluid concrete into an excavated hole. These elements rely largely on side shear resistance generated by their substantial diameters and lengths to effectively transfer loads. Therefore, an exceptional concrete to soil interface is essential for proper performance of these structures. The FDOT preferred stabilization fluid, bentonite slurry, has been proven to degrade this interface with increased exposure time due to filter cake formation. For this reason, slurry exposure time has been limited to 36 hours by FDOT. Alternately, polymer slurries do not form a filter cake but rather stabilize excavations through …

Investigation Of Future Flow Reducer Sizes In Houses Added To An Existing Gravity Flow Water System To Ensure Its Sustainability, Michelle Roy

USF Tampa Graduate Theses and Dissertations

Goal 6 of the United Nations Development Program’s new Sustainable Development Goals aims to ensure availability of clean water and sustainable management practices to all by the year 2030. Peace Corps Panama partners with communities in order to help provide sustainable water solutions to communities in need. Water, Sanitation, and Hygiene (WASH) Volunteers spend at least two years living in a community to identify and implement solutions to water problems and train local water committees on how to maintain their improved systems. A common solution for unequal distribution of flow in the distribution network of a gravity flow water system …

Beams, Bobby (Fa 955), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 955. Paper titled: “Sawmills Past and Present in Hart, southern LaRue, and western Green County.” Includes description, terms, illustration, and photos of sawmills in the Penny Royal Region of Kentucky.

Powers, Doug (Fa 954), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 954. Paper titled: “Montgomery’s Mill.” Includes description, terms illustration, and photos of Montgomery’s Mill in Green County, Kentucky.

Harbison, Kay (Fa 957), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 957. Paper titled: “Watermills.” Includes survey sheets of descriptions of watermills in Metcalfe County, Kentucky. Sheets include a description, informant’s name, terms, and a photo of a watermill.

Hay, William G. (Fa 951), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 951. Paper titled: “Hardin Springs.” Includes description, terms, beliefs, and photos of Hardin Springs and the watermill in Hardin County, Kentucky.

Polston, Earl (Fa 950), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 950. Project titled: “Watermills.” Project includes survey sheets with brief descriptions of watermills in Clinton County, Kentucky and Pall Mall in Fentress County, Tennessee. Sheets include a brief description, owner’s name, and a photo of the watermill.

Montell, William Lynwood, 1931-2023 (Fa 952), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 952. Paper titled: “[Student Collections: Watermills]," WKU Professor Lynwood Montell’s compilation of survey sheets from various collections by students with brief descriptions of watermills in Kentucky and Connecticut. Sheets may include a brief description, informant’s name, terms, a photo and/or illustration.

Cement Asphalt Mortar Modelling And Its Influence On High-Speed Train–Bridge System In Presence Of Moderate Earthquakes And Service Loading, Lingkun Chen

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.

Research On Aseismic Behavior Of Assemble-Type Composited Wall, Yuanyuan Zhao

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.

Numerical Modeling And Seismic Assessment Of Smart Isolation System For High-Speed Railway Rc Bridge Subjected To Near-Field Ground Motions, Lingkun Chen

The 8th International Conference on Physical and Numerical Simulation of Materials Processing

No abstract provided.

Montell, William Lynwood, 1931-2023 (Fa 949), Manuscripts & Folklife Archives

Folklife Archives Finding Aids

Finding aid only for Folklife Archives Project 949. Paper titled: “[Student Collections: Watermills]," WKU professor Lynwood Montell’s compilation of survey sheets from various collections by students with brief descriptions of watermills, farm implements, steam engines, etc. from the Knobs and Penny Royal Regions in Kentucky and Connecticut. Sheets may include a brief description, informant’s name, terms, a photo and/or illustration.