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Now showing items 11-20 of 24
End-Region Evaluation of Hybrid Ultra-High-Performance Concrete/Conventional Concrete Prestressed Girders
(2023-12-15)
In prestressed concrete girders, the end-regions are often susceptible to high internal forces induced by prestressing, resulting in crack propagation. Resisting these forces necessitates a substantial amount of reinforcing ...
Application of Traffic Speed Deflectometer and AI-Based Models for Structural Calibration and Pavement Management Enhancement
(2023)
Currently, different methods are used for the evaluation of pavement conditions including the surface, base, subbase, and subgrade. Among these, Falling Weight Deflectometer (FWD) and/or Fast Falling Weight Deflectometer ...
Performance and environmental impact assessment of agricultural waste-based sorbents for phosphorus recovery and reuse
(2023-05)
Phosphorus is an essential resource, yet global phosphorous reserves are limited, and increasing quantity of high-grade ore is being mined and turned into fertilizers to meet the increasing demand of food. However, since ...
Impact of elevated temperatures on soil tensile strength
(2021-05-14)
Tensile strength of unsaturated soils is a critical factor controlling the initiation and propagation of desiccation cracks, which can threaten the structural integrity of natural and man-made earthen structures and slopes. ...
Interpretation of shear wave velocity in unsaturated soils
(2023-12-15)
Shear wave velocity measurements in soil can provide estimates of small strain stiffness and are used for seismic site classification. In comparison to saturated soils, there has been relatively little research on the ...
Phosphorus, Iron and Trace Metal Interactions at the Sediment Layer-Water Column Interface: The Potential Role of Recovered Mine Drainage Residuals
(2020-05)
Nutrient enrichment, eutrophication and harmful algal blooms are global environmental concerns. The study site, Grand Lake o’ the Cherokees (GLOC) located in northeast Oklahoma, experiences eutrophication due to excess ...
Development and evaluation of a hydrological and hydraulic coupled flood prediction system enabled by remote sensing, numerical weather prediction, and deep learning technologies
(2021-05-14)
Floods triggered by extreme precipitation are the most frequently occurring and disastrous natural hazards in the world. However, it is still challenging to provide accurate and flood mapping, flood damage estimation, and ...
The Impact of a Private Water Enterprise on Household Water Services in Rural Ghana
(2020-05-08)
The goal of this dissertation is to investigate the effectiveness and sustainability of a private water service delivery model in a rural, developing context. Recent studies have found evidence for greatly increased ...
Designing and Characterizing Surfactant Formulations for Detergency of Oily and Solid Non-Particulate Soils
(2020)
Laundry detergency is a complex process at the nexus of soil, surfactant, solid substrate, and wash condition. This dissertation contains the following two major topics. The first topic focused on developing surfactant ...
Development of a novel apparatus to determine the multiaxial tensile failure criteria for ultra-high performance concretes
(2021-12)
The use of ultra-high performance concrete (UHPC), a stronger and more durable class of concrete, has increased in recent years. Large-scale production has been limited due to the cost of proprietary UHPC products, but the ...