Browsing by Department "Civil Engineering"
Now showing items 261-280 of 394
Microbial Growth Kinetics of a Defined Mixed Culture: Genomic Assay Application
(2012-03-29)
Microbial growth kinetics is often used to optimize environmental processes owing to its linkage to the breakdown of substrate (contaminants). However the quantification of bacterial populations in the environment is ...
A Microsimulation Analysis on the Impact of Different Bridge Deck Replacement Methods on Travel Times and Road User Costs
(2012-01-09)
The objective of this research was to evaluate different bridge deck replacement methods using microsimulation software. Previously collected data from the test site, located on I-59 at State Route 68 near Collinsville, ...
Mitigation of Alkali-Silica Reaction in the Bibb Graves Bridge
(2012-07-23)
The Bibb Graves Bridge in Wetumpka, AL has severe damage due to
alkali-silica reaction (ASR) in two of its reinforced concrete arches. A mitigation
procedure developed in the summer of 2010 by the FHWA, ALDOT, and ...
Mitigation of Cracking in Cast-In-Place Reinforced Concrete Box Culverts in Alabama
(2012-08-14)
Significant cracking was observed in Alabama Department of Transportation (ALDOT) cast-in-place (CIP) reinforced concrete box culverts in the Anniston East Bypass (AEB) project in Anniston, AL. Numerous wide, transverse ...
Model for Permit Loads for Barnes Slough Bridge
(2016-12-09)
ALDOT has an eleven-span flat slab concrete bridge over Barnes Slough and Jenkins Creek on the northbound side of US Highway 82/231 that was built in 1915 for which there are no construction drawings or other available ...
A Model for the Regional Variability of Riprap Prices in Alabama
(2020-05-05)
Riprap is widely used by departments of transportation (DOTs) for erosion control and slope stabilization activities. Even though DOTs seem to be satisfied with the ability of riprap to fulfill its intended purpose, its ...
Modeling Factors Influencing Commuter Cycling Routes: A Study of GPS Cycling Records in Auburn, Alabama
(2015-08-19)
As the emphasis placed on cycling as a means of transportation is increasing in the United States, so is the need for adequate facilities that provide cyclists with a comfortable and connected facility. In order for these ...
Modeling of the Wolf Bay and Perdido Bay Watersheds using HSPF
(2017-07-27)
This study is the first stage of the larger project for determining the transport mechanism of endocrine disruptors that flow through the Perdido Bay Basin. Given within are the methods and processes used to perform watershed ...
Modeling the Risk of Wrong-Way Driving at Freeway Exit Ramp Terminals
(2019-07-23)
Wrong-way driving (WWD) crashes are a critical safety issue on freeways. Although these crashes are rare in nature, they often result in severe injuries and/or fatalities. Typically, exit ramp terminals are the initial ...
Modeling Water Quality Impacts of Off-Road Vehicles in Forested Watersheds
(2005-08-15)
Erosion from off-road vehicles can cause negative effects on water quality by impairing fish habitat and shortening reservoir life. Due to an increasing level of off-road vehicle use throughout the country, this impact ...
Moisture Content Monitoring using a Nuclear Moisture Gauge and Preliminary Findings at Alabama Highway 5
(2017-04-20)
Expansive soils cause damage to lightly loaded foundations and structures across the
world. Alabama Highway 5 was built directly on an expansive clay soil. In past years it has
experienced tremendous amounts of damage ...
Monitoring and Evaluation of Alabama’s First Geosynthetic Reinforced Soil-Integrated Bridge System
(2018-10-31)
Geosynthetic reinforced soil-integrated bridge systems (GRS-IBS) use closely spaced layers of geosynthetic reinforcement and compacted granular backfill to directly support the bridge deck and blend the abutment and roadway ...
Moving Forecasting Error: A Risk-Based Cost Forecasting Approach
(2020-05-04)
The large amounts of historical pricing data the state transportation agencies (STAs) have collected during the last couple of decades, combined with the information technologies available today, have facilitated greater ...
Near-Surface Mounted, Fiber-Reinforced Polymer Strips for Negative-Moment Strengthening of Concrete Bridges—Design Methodology
(2009-05-12)
A bridge near Letohatchee, Alabama, was found to be deficient for certain types of truck loadings. Fiber-reinforced polymer (FRP) strips were selected to use in the strengthening scheme. Various models and code recommendations ...
Near-Surface-Mounted Fiber-Reinforced Polymer Strips for Strengthening of Reinforced Concrete Girders
(2012-01-09)
The AL 97 bridge over I-65 near Letohatchee, Alabama, has been found to have deficient negative-moment capacity under current loading standards. A near-surface-mounted fiber-reinforced polymer (NSM FRP) strengthening system ...
A New Class of Adsorptive Photocatalysts for Enhanced Adsorption and Destruction of 4-chlorophenol and perfluorooctanoic acid
(2019-12-05)
Four novel Ti-based adsorptive photocatalysts, namely titanate nanosheets (TNS), graphene grafted titania/titanate nanosheets (G/TNS), activated carbon modified titanate nanotubes (TNTs@AC), and iron doped, activated carbon ...
A New Concept Design of Directional Rumble Strips for Deterring Wrong-way Freeway Entries
(2016-05-03)
Wrong-way driving (WWD) on freeways has been identified as a serious traffic safety problem. Drivers who make wrong-way entries onto freeways pose a serious risk to the safety of other motorists and themselves. This study ...
New Methods for Predicting Critical Tensile Strains in an M-E Framework
(2012-12-06)
As mechanistic-empirical pavement design comes to the forefront of design, the accurate prediction of critical tensile strains at the bottom of the asphalt concrete (AC) becomes increasingly more important to predict fatigue ...
Nondestructive Evaluation of Prestressed Concrete Structures by Means of Acoustic Emissions Monitoring
(2008-12-15)
The acoustic emission (AE) technique has been found to be an informative nondestructive testing (NDT) method for evaluation of structures constructed with certain materials. While AE evaluation procedures and evaluation ...
Numerical assement and evaluation of a stream monidification strategy to address sediment aggradation issues at Dean Road bridge in Dale County, Alabama
(2019-01-07)
Severe aggradation in bridge structures is a serious issue since it may lead to overtopping episodes during peak flows or increased risk of serious structural damage. Aggradation processes may be caused by changes in ...