Browsing Department of Civil Engineering by Issue Date
Now showing items 21-40 of 631
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Removal Of Carbonyl Sulfide Using Compost Biofilter: Measurement Of Removal Rates And Elimination Capacity In Conjunction With Hydrogen Sulfide
(Civil & Environmental Engineering, 2007-08-23)A lab study using biofiltration was conducted using three PVC columns as biofilters, with hardwood chips and compost as the media. Previous research determined the removal efficiency of carbonyl sulfide alone. (Nawal, 2004) ... -
Permeability Of Municipal Solid Waste In Bioreactor Landfill With Degradation
(Civil & Environmental Engineering, 2007-08-23)Bioreactor landfills are operated and controlled to accelerate refuse decomposition, gas production and biological stabilization of the municipal solid waste (MSW). Leachate recirculation in bioreactor landfill creates a ... -
Stated Preference Modeling And Analysis Of Managed Lanes
(Civil & Environmental Engineering, 2007-08-23)The thesis deals with the Managed Lanes demand estimation problem in the state of Texas. Managed Lanes are a general type of High Occupancy Toll roads, whose lane management and operational features may be dynamically ... -
Regional Prioritization Of Corridors For Traffic Signal Retiming
(Civil & Environmental Engineering, 2007-08-23)Every three to four years, the North Central Texas Council of Governments (NCTCOG) funds signal retiming projects to improve air quality in the Dallas-Fort Worth region. As sufficient funds are not available to retime all ... -
Discharge Headway At Signalized Intersections In Monterrey, Nuevo Leon, Mexico
(Civil & Environmental Engineering, 2007-08-23)Driver behavior has been the subject of study for almost 100 years. As a result, driver characteristics have been determined and used in the design of highway elements, both for interrupted and for free flow facilities. ... -
Characterization Of Cemented And Fiber-reinforced RAP Aggregate Materials For Base/ Sub-base Applications
(Civil & Environmental Engineering, 2007-08-23)The engineering product known as RAP is a bonded base and sub-base material produced by the process of blending crushed recycled construction and demolition waste and debris to specified gradation requirements, and by ... -
Photocatalytic Degradation Of VOCs, Toxics And Odors From Air Emissions Of Wastewater Treatment Plants And Municipal Solid Waste Landfills
(Civil & Environmental Engineering, 2007-08-23)The 1990 Clean Air Act Amendments (CAAA) require more stringent controls of sources of volatile organic compounds (VOCs) and hazardous air pollutants (HAPs). Air quality managers at the state level are responsible for ... -
Comparison Of Clinoptilolite With Gravel In A Recirculating Course Media Biofilter Treating Simulated Septic Tank Effluent
(Civil & Environmental Engineering, 2007-08-23)The main objective of the pilot scale study was to compare the performance of recirulating clinoptilolite biofilter with course gravel biofilter used to treat simulated septic tank effluent by simultaneous nitrification ... -
Assessment Of Soil-water Retention Properties Of Lime And Cement Treated Clays
(Civil & Environmental Engineering, 2007-08-23)The soil-water characteristic curve (SWCC) of unsaturated soils has considerable importance in the analysis of geotechnical engineering problems involving soils that remain under partially saturated conditions throughout ... -
Experimental Investigation Of Shear Capacity Of Precast Reinforced Concrete Box Culverts
(Civil & Environmental Engineering, 2007-08-23)This study presents the experimental investigation of the shear capacity of four precast rinforced concrete box culverts. Each culvert was subjected to a monotomically increasing load through a 20-in x 10-in load plate, ... -
Comparison Of Adsorption Capacities Of Nanoadsorbents With Conventional Activated Carbon For Volatile Organic Compounds
(Civil & Environmental Engineering, 2007-08-23)This research explores the potential for using single wall carbon nanohorns (SWNHs) for adsorption of volatile organic compounds (VOCs) categorized as hazardous air pollutants and which contribute to ground level ozone ... -
Effectiveness Of Signal Coordination As An Emission Reduction Measure For Vehicles
(Civil & Environmental Engineering, 2007-08-23)Air Pollution is a significant health and environmental concern. Vehicular emissions are major contributors to many air pollution problems. There is growing interest in reducing carbon dioxide emission because of the ... -
Effects Of Water-cement Ratio On Deep Mixing Treated Expansive Clay Characteristics
(Civil & Environmental Engineering, 2007-08-23)The structures built on the unstabilized expansive soils are subjected to distress due to swell shrink behavior due to seasonal fluctuations. Medium stiff expansive clays with moderate and high PI were collected from two ... -
Performance Studies On Rigid Pavement Sections Built On Stabilized Sulfate Soils
(Civil & Environmental Engineering, 2007-08-23)Soils of Southeast Arlington are highly expansive and rich in sulfates. They undergo sulfate induced heaving when traditional calcium based stabilizers are used for soil stabilization (Puppala et al. 1998). Traditional ... -
Water Damage Evaluation Of Concrete Infrastructure
(Civil & Environmental Engineering, 2007-08-23)This study presents an experimental program to evaluate the effect of a special waterproofing material, International Chem-Crete Pavix (CCP), on the durability of concrete. The experimental program identified the concrete ... -
Impact Of A Pre-combustion Retrofit Device On Vehicular Emissions: A Case Study
(Civil & Environmental Engineering, 2007-08-23)Vehicular emissions are a major cause of air pollution in the cities worldwide. Increased numbers of vehicles and the vehicle miles traveled by them every year means that the emissions are going to have a detrimental effect ... -
General Response Of Kneading-compacted Unsaturated Silty Sand Under Drained And Undrained True Triaxial Testing
(Civil & Environmental Engineering, 2007-08-23)A comprehensive series of 36 drained and 36 undrained true triaxial tests was accomplished to investigate the stress-strain-strength behaviour of kneading-compacted unsaturated silty sand (SP-SM) under multi-axial stress ... -
Trends Of Vehicular Emissions Due To The Effect Of Ethos® FR As Fuel Additive
(Civil & Environmental Engineering, 2007-08-23)The main objective of this research was to observe if the addition of the fuel additive Ethos Fuel Reformulator significantly reduced the emissions of CO, CO2, HC and NOX from a light duty vehicle. Data collection was ... -
Numerical Modeling And Analysis Of Pile Supported Embankments
(Civil & Environmental Engineering, 2007-08-23)Very soft clays are often avoided in construction due to their low shear strength and high compressibility. Special construction methods are adopted when embankments are constructed on very soft clay or peat. Design of ... -
Statistical Analysis Of Compressive Strength Of Clay Brick Masonry Prisms
(Civil & Environmental Engineering, 2007-08-23)The Specification for Masonry Structures section of the current governing masonry design document in the U.S., reported by the Masonry Standards Joint Committee (MSJC), contains tables that can be used to determine the ...