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Now showing items 11-20 of 62
Performance characteristics of selected asphalt mixes : a laboratory and field study
(2006)
A combined laboratory and field study was undertaken to investigate the performance characteristics of some Hot Mix Asphalt (HMA) mixes that are commonly used by Oklahoma Department of Transportation (ODOT). Four different ...
Development of a Verified Non-Linear Winkler Model for the Seismic Analysis of Piles in Improved Ground
(2019-12-13)
Several ground improvement techniques that are proven to be effective and economical solutions to increase the lateral stiffness and strength of weak soils around piles often result in unwarranted conservative volumes of ...
THE EFFECTS OF CASTOR CANADENSIS (NORTH AMERICAN BEAVER) COLONIZATION ON A MINE DRAINAGE IMPACTED STREAM
(2017-12)
This study investigated four aspects of North American Beaver (Castor canadensis) colonization: (1) retention of metals in-stream due to the presence of dams, (2) metals contamination and leachability of sediments (3) ...
Investigation of the Effects of End Region Deterioration in Precast, Prestressed Concrete Bridge Girders
(2016)
An important factor in life expectancy of concrete bridges is the effect of corrosion of reinforcing steel on concrete and appurtenant embedded materials. New bridges, though continuously exposed to the elements, are ...
The Influence of Organic Metabolites Binding with Ferric Iron on Corrosion Mechanisms in Oil and Gas Production Water
(2018-05-11)
Corrosion of carbon steel is a potential hazard to oil and gas production infrastructure. The total annual cost of corrosion in the oil and gas production industry is estimated to be $1.372 billion in the USA (Simons, ...
The Role of Solar-Powered Float-Mix Aerators on Iron Retention in Passive Treatment Oxidation Ponds
(2019-12)
In passive treatment of net-alkaline mine drainage, oxidation ponds are typically the primary process unit designed to promote iron oxidation, hydrolysis, and precipitation. Iron oxidation kinetics can be accelerated by ...
Oklahoma Earthquakes and Their Effects on Highway Bridges
(2017-05-13)
Oklahoma is presently experiencing a higher rate of earthquake activity than historically
observed. Historical data on earthquake-induced damage to Oklahoma bridges is limited,
so the Oklahoma Department of Transportation ...
Laboratory Characterization of Foamed WMA Containing RAP
(2019-08-01)
For more than two decades, the asphalt paving industry has been using Reclaimed Asphalt Pavement (RAP) and various types of Warm Mix Asphalt (WMA) technologies in the production of asphalt mixes to reduce impact on the ...
The Performance of Cement-Limiting and High-Volume Recycled Material Mix Designs for Use in Concrete Pavements Through Laboratory and Field Implementation Testing
(2016-05)
Conventional methods of replacing roadways are beginning to negatively impact the environment. The continued use of high volumes of cement will continue to exacerbate the increasing levels of carbon dioxide. In addition ...