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Now showing items 61-70 of 70
Characterization of Activities of Crumb Rubber in Interaction with Asphalt and its Effect on Final Properties
(North Dakota State University, 2015)
Recycling of millions of scrap tires produced everyday is crucial challenge encountered by waste management systems. Recycling tire rubbers in form of ground tire rubber, known as crumb rubber modifier (CRM), in asphalt ...
A Comparative Study of Nitrification in Fargo and Moorhead Distribution Networks
(North Dakota State University, 2012)
Nitrification in water distribution networks has become a growing concern for water supplies in the United States. The use of chloramines as a disinfectant in distribution pipe networks has become increasingly popular to ...
Seismic Performance of Yielding Columns Supported by Rocking Foundations: A Computational Study
(North Dakota State University, 2016)
The effectiveness of foundation rocking as a seismic energy dissipation mechanism to reduce shake demands is studied by the use of a finite element numerical model consisting of a realistic structure and a soil-foundation ...
Pore Structure and Pore Solution in Alkali Activated Fly Ash Geopolymer Concrete and Its Effect on ASR of Aggregates with Wide Silicate Contents
(North Dakota State University, 2019)
Alkali silica reaction (ASR) is detrimental to concrete. It is a time-dependent phenomenon, which can lead to strength loss, cracking, volume expansion, and premature failure of concrete structures. In essence, it is a ...
Hydrologic Experiments and Analysis: The Effect of Microtopography on Runoff Generation
(North Dakota State University, 2014)
Microtopography is an important factor in hydrologic processes. The purpose of this research was to study the effects of microtopography on runoff generation. Specifically, this was performed through an array of physical ...
Land Use and Climate Impact on Sediment and Nutrient Loads Into Lake Ashtabula, North Dakota, USA
(North Dakota State University, 2016)
Lake Ashtabula continues to be listed as impaired water body by the USEPA due to excessive nutrients. A Soil and Water Assessment Tool (SWAT) model was developed for the Lake Ashtabula watershed to estimate the sediment ...
Infiltration and Unsaturated Flow under the Influence of Surface Microtopography: Model Simulations and Experimental Observations
(North Dakota State University, 2014)
Surface microtopography affects fundamental hydrologic processes including infiltration and soil-water percolation at different scales. By means of studying the unsaturated flow, this thesis research is aimed to evaluate ...
Evaluating the Effects of Rail Preemption Strategies on Highway Safety and Operations
(North Dakota State University, 2011)
Previous research related to signal preemption near highway-rail grade crossings
has emphasized safety considerations, which are paramount due to the severity of potential
train-vehicle collisions. The purpose of this ...
Quantification of the Influences of Subsurface Uncertainties on Seismic Behavior of Shallow Foundations
(North Dakota State University, 2011)
The properties of geomaterials are uncertain. These uncertainties not only affect the
dynamic behavior of the geomaterials, but also significantly influence the complex
nonlinear dynamics between the soil, foundation, ...
Time-dependent Behavior of Various FRP Composites for Structural Applications
(North Dakota State University, 2011)
This thesis represents the long-term behavior of fiber reinforced polymer (FRP)
materials for structural applications. FRP composites consist of high-strength fibers
embedded in an epoxy resin. The long-term investigations ...