Browsing Department of Civil Engineering by Issue Date
Now showing items 41-60 of 631
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Evaluation Of Resilient Modulus Of Cement And Cement-fiber Treated Reclaimed Asphalt Pavement (RAP) Aggregates
(Civil & Environmental Engineering, 2007-08-23)Natural aggregates derived from a variety of source rocks have been used as a road base material. But the extraction of natural aggregates resources is increasingly being constrained by urbanization, increased costs and ... -
Autotrophic Denitrification Of Groundwater In A Granular Sulfur-packed Up-flow Reactor
(Civil & Environmental Engineering, 2007-09-17)Autotrophic denitrification is an effective treatment technique for nitrate removal from groundwater. Six basic elements are required for the growth of autotrophic denitrifiers: (1) electron donor, (2) electron acceptor, ... -
Capacity Estimation Of Two-sided Type C Weaves On Freeway
(Civil & Environmental Engineering, 2007-09-17)A weaving section is a common design on major highway facilities that has been an interest to researchers for years. Weaving areas are characterized by frequent lane changes, which significantly reduce the capacity of the ... -
Roadway Shallow Water Flow Modeling By Velocity Distribution
(Civil & Environmental Engineering, 2007-09-17)Manning's equation is a widely used method for determining flow discharge in a channel with unconfined gravity flow. The roughness value, n-value, is a critical factor for Manning equation to obtain the accurate amount of ... -
The Travel Behavior Of Minority Cohorts In Texas
(Civil & Environmental Engineering, 2007-09-17)Texas is changing dramatically; the most conservative population forecast indicates that Hispanics will account for 50% of the Texas population before 2035. Not only is the number of Hispanics on the rise in Texas, but ... -
Vehicular Emissions Models Using Mobile6.2 And Field Data
(Civil & Environmental Engineering, 2007-09-17)Regression models to predict vehicular emissions for different categories of vehicles for different pollutants are presented in this thesis. Vehicular emissions are affected by numerous variables which, among others, include ... -
Dynamic Chracteristics And Stability Analysis Of Muncipal Solid Waste In Bioreactor Landfills
(Civil & Environmental Engineering, 2007-09-19)Bioreactor landfills are operated to enhance refuse decomposition, gas production, and waste stabilization. The major aspect of bioreactor landfill operation is the recirculation of generated leachate back through the ... -
Experimental And Finite Element Based Investigations Of Shear Behavior In Reinforced Concrete Box Culverts
(Civil & Environmental Engineering, 2007-10-08)This study evaluates the shear behavior and capacity of the precast concrete box culverts subjected to HS 20 truck wheel load. The most critical culvert behavior was considered by studying culverts subjected to zero depth ... -
Effects Of A Debonding Flaw Size And Location On The Flexural Performance Of CFRP Retrofitted Steel Sections
(Civil & Environmental Engineering, 2007-10-08)In US there are several thousand steel bridges at present. Out of them many bridges are at various level of advance deteriorations due to many years of service life and environmental factors. These bridges cannot be fully ... -
First Findings from the Kansas Perpetual Pavements Experiment
(Transportation Research Board of the National Academies, 2008)To investigate the suitability of the perpetual pavements concept for Kansas highway pavements, the Kansas Department of Transportation (KDOT) constructed four thick, flexible pavement structures on a new alignment on ... -
Investigations of shear behavior in reinforced concrete boxes
(American Concrete Pipe AssociationDepartment of Civil and Environmental Engineeing, University of Texas at Arlington, 2008)Box culverts have been used increasingly since 1965 to meet drainage requirements where the site conditions and loads acting upon them have been appropriate. It is believed that 80% of single barrel culvert installations ... -
Comparison Of Distributed Versus Lumped Hydrologic Simulation Models Using Stationary And Moving Storm Events Applied To Small Synthetic Rectangular Basins And An Actual Watershed Basin
(Civil & Environmental Engineering, 2008-04-22)The purpose of this investigation is to compare simulations using several artificial rectangular basins and a real drainage basin for distributed and lumped hydrologic models via results obtained with the U.S. Geological ... -
Regression Model For Prioritization Of Corridors When Retiming Traffic Signals
(Civil & Environmental Engineering, 2008-04-22)Traffic signals are used by transportation engineers to safely and efficiently manage vehicle, bicycle and pedestrian traffic on roadways. However, to maintain the effectiveness of traffic signals, traffic signals should ... -
Deep Mixing Technology For Mitigation Of Swell-shrink Behavior Of Expansive Soils Of Moderate To Deep Active Depths
(Civil & Environmental Engineering, 2008-04-22)Expansive soils are well known for their cyclic shrink-swell behavior due to seasonal related moisture changes. These cyclic movements of expansive soils are due to physico-chemical changes at particle level that are ... -
Modeling Unsaturated Soil Response Under Suction-controlled Multi-axial Stress States
(Civil & Environmental Engineering, 2008-04-22)In this research work, a novel suction-controlled true triaxial testing apparatus has been developed to test 3-in (7.5-cm) side, cubical specimens of unsaturated soil under controlled-suction states for a wide range of ... -
Trends Of Vehicular Emissions For Clean Air Associates Precombustion Retrofit Device
(Civil & Environmental Engineering, 2008-04-22)The research study objective was to find if there was any reduction in onboard exhaust emissions from a light duty passenger car (2007 Dodge Charger) with a Clean Air Catalytic Converter manufactured by Clean Air Associates, ... -
Experimental And Field Monitoring Studies On Recycled Materials As Pavement Bases
(Civil & Environmental Engineering, 2008-04-22)Natural aggregates derived from a variety of source rocks have been used as a road base material. But the extraction of natural aggregates resources is increasingly being constrained by urbanization, increased costs and ... -
The Effect Of Temperature On Fiber Composite Bridge Decks
(Civil & Environmental Engineering, 2008-08-08)The use of Fiber composite honeycomb structure's as bridge decks gained importance, because of its low light weight and ease of installation. In this study, The Fiber composite bridge decks were subjected to thermal ... -
Ductile Lightweight Concrete For Lightweight Structural Application
(Civil & Environmental Engineering, 2008-08-08)This study developed a ductile concrete for precast wall systems which are capable of resisting high wind in excess of 500 mph. The developed concrete mix design consists of sand, cement, glass fiber, and a foaming agent ... -
Impact Of Lateral Swell Pressure On Retaining Structure Design Using Expansive Cohesive Backfill
(Civil & Environmental Engineering, 2008-08-08)Since cohesive soils are difficult to drain once becoming saturated, in order to reduce lateral earth pressures exerted by saturated cohesive soils on retaining structures, retaining wall designs most always specify use ...