Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Department of Civil, Environmental, and Geospatial Engineering (3)
- Rutting (2)
- UHPC (2)
- Absorption (1)
- Adsorption; air-entraining admixture; fly ash; foam index; slurry; supplementary cementitious admixture (1)
-
- Air injection (1)
- Annual maximum flood series (1)
- Anthropogenic emissions (1)
- Asphalt (1)
- Bio-oil (1)
- Bio-oil Aging (1)
- Biogenic emissions (1)
- Buildings (1)
- Capture (1)
- Carbon Dioxide (1)
- Cliff Recession (1)
- Concrete (1)
- Correlation (1)
- Department of Geological and Mining Engineering and Sciences (1)
- Dynamic Modulus (1)
- Erosion (1)
- Fatigue (1)
- Fatigue Cracking (1)
- Fire engineering (1)
- Flood risk assessment (1)
- Flood risk forecasting (1)
- Foamed WMA (1)
- Freeze-Thaw (1)
- Geopolymer (1)
- Glass (1)
- Publication
- Publication Type
Articles 1 - 21 of 21
Full-Text Articles in Engineering
Free-Troposphere Ozone And Carbon Monoxide Over The North Atlantic For 2001-2011, Aditya Kumar, S. Wu, M. F. Weise, R. Honrath, R. C. Owen, D. Helmig, L. Kramer, M. Val Martin, Q. Li
Free-Troposphere Ozone And Carbon Monoxide Over The North Atlantic For 2001-2011, Aditya Kumar, S. Wu, M. F. Weise, R. Honrath, R. C. Owen, D. Helmig, L. Kramer, M. Val Martin, Q. Li
Michigan Tech Publications
In situ measurements of carbon monoxide (CO) and ozone (O3) at the Pico Mountain Observatory (PMO) located in the Azores, Portugal, are analyzed together with results from an atmospheric chemical transport model (GEOS-Chem) and satellite remote sensing data (AIRS (Atmospheric Infrared Sounder) for CO, and TES (Tropospheric Emission Spectrometer) for O3) to examine the evolution of free-troposphere CO and O3 over the North Atlantic for 2001-2011. GEOS-Chem captured the seasonal cycles for CO and O3 well but significantly underestimated the mixing ratios of CO, particularly in spring. Statistically significant (using a significance level of 0.05) decreasing trends were found for …
Performances Evaluation Of Cecabase® Rt In Warm Mix Asphalt Technology, Shu Wei Goh, Mohd Rosli Mohd Hasan, Zhanping You
Performances Evaluation Of Cecabase® Rt In Warm Mix Asphalt Technology, Shu Wei Goh, Mohd Rosli Mohd Hasan, Zhanping You
Michigan Tech Publications
The purpose of this study was to evaluate the performance of warm mix asphalt (WMA) mixtures containing different percentages of Cecabase® RT using dynamic modulus (|E*|), tensile strength ratio (TSR), four point beam fatigue, flow number and asphalt pavement analyzer (APA) rutting tests. In this study, 0.2%, 0.35% and 0.5% Cecabase® RT were incorporated in the 5E3 Superpave mixtures prepared at three different temperatures, 100 °C, 115 °C and 130 °C. A Hot Mix Asphalt (HMA) mixture was used as the control mixture. All the mixture samples were prepared using PG 58-34 binder and compacted at 86 gyrations under different …
Rheological Evaluation Of Foamed Wma Modified With Nano Hydrated Lime, Aboelkasim Diab, Zhanping You, Hainian Wang
Rheological Evaluation Of Foamed Wma Modified With Nano Hydrated Lime, Aboelkasim Diab, Zhanping You, Hainian Wang
Michigan Tech Publications
Although the Warm Mix Asphalt (WMA) is gaining popularity very rapidly and becoming a mainstream technique for producing asphalt mixtures, there are many concerns regarding its long-term performance. Over the years, the Regular Hydrated Lime (RHL) has gained considerable recognition as a common additive to bituminous pavements. However, the Nano Hydrated Lime (NHL) (particle sizes 100 nanometer (nm) or less) has not been used as an additive to the asphalt mixtures before. The rheology properties of foamed WMA were studied since the pavement performance is primarily controlled by the rheological properties of asphalt cement. NHL materials with particle sizes of …
2013 Civil And Environmental Engineering Department News, Department Of Civil And Environmental Engineering, Michigan Technological University
2013 Civil And Environmental Engineering Department News, Department Of Civil And Environmental Engineering, Michigan Technological University
Department of Civil, Environmental, and Geospatial Engineering Newsletters
Table of Contents
- New Faculty
- Student Awards
- Research Awards
- Department News
- Academy of Civil and Environmental Engineers
- CEE Donor Recognition
Assessment Of Seismic Damage Of Buildings And Related Environmental Impacts, Carley A. Feese
Assessment Of Seismic Damage Of Buildings And Related Environmental Impacts, Carley A. Feese
Dissertations, Master's Theses and Master's Reports - Open
Sustainable development has only recently started examining the existing infrastructure, and a key aspect of this is hazard mitigation. To examine buildings under a sustainable perspective requires an understanding of a building's life-cycle environmental costs, including the consideration of associated environmental impacts induced by earthquake damage. Damage repair costs lead to additional material and energy consumption, leading to harmful environmental impacts. Merging results obtained from a seismic evaluation and life-cycle analysis for buildings will give a novel outlook on sustainable design decisions. To evaluate the environmental impacts caused by buildings, long-term impacts accrued throughout a building's lifetime and impacts associated …
A Hydro-Climatic Modeling Framework For Adaptive Water Resources Management In The Great Lakes Basin, Rabi Gyawali
A Hydro-Climatic Modeling Framework For Adaptive Water Resources Management In The Great Lakes Basin, Rabi Gyawali
Dissertations, Master's Theses and Master's Reports - Open
This dissertation addresses water resources decision making in the Great Lakes Basin by developing a multi-model framework for climate change impact assessment, including integrated climate and hydrologic modeling. Physically based watershed models, using soil moisture accounting and temperature index (degree-day) snowmelt algorithms, are developed, calibrated and validated to simulate baseflow, snowmelt, and surface runoff under historic conditions. Comparison with an existing model of the Great Lakes basin, the NOAA Large Basin Runoff Model (LBRM), showed improvements resulting from the increased spatial resolution and use of a more process-based snow algorithm in the Hydrologic Engineering Center's Hydrologic Modeling System (HECHMS). As …
A Study Of The Impacts Of Freeze-Thaw On Cliff Recession At The Calvert Cliffs In Calvert County, Maryland, Bonnie Elizabeth Zwissler
A Study Of The Impacts Of Freeze-Thaw On Cliff Recession At The Calvert Cliffs In Calvert County, Maryland, Bonnie Elizabeth Zwissler
Dissertations, Master's Theses and Master's Reports - Open
The Calvert Cliffs, which form much of the western coastline of the Chesapeake Bay in Calvert County, Maryland, are actively eroding and destabilizing, resulting in a critical situation for many homes in close proximity to the slope's crest. Past studies have identified that where waves directly interact with the toe of the slope, wave action controls cliff recession; however, where waves do not regularly interact with the slope toe, the past work identified that freeze-thaw controls recession. This study investigated the validity of this second claim by analyzing the recession rate and freeze-thaw behavior of six study sites along the …
Evaluation Of Non-Stationarity In Annual Maximum Flood Series Of Moderately Impaired Watersheds In The Upper Midwest And Northeastern United States, Neila Salvadori
Evaluation Of Non-Stationarity In Annual Maximum Flood Series Of Moderately Impaired Watersheds In The Upper Midwest And Northeastern United States, Neila Salvadori
Dissertations, Master's Theses and Master's Reports - Open
United States federal agencies assess flood risk using Bulletin 17B procedures which assume annual maximum flood series are stationary. This represents a significant limitation of current flood frequency models as the flood distribution is thereby assumed to be unaffected by trends or periodicity of atmospheric/climatic variables and/or anthropogenic activities. The validity of this assumption is at the core of this thesis, which aims to improve understanding of the forms and potential causes of non-stationarity in flood series for moderately impaired watersheds in the Upper Midwest and Northeastern US. Prior studies investigated non-stationarity in flood series for unimpaired watersheds; however, as …
An Investigation Of Waste Glass-Based Geopolymers Supplemented With Alumina, Mary U. Christiansen
An Investigation Of Waste Glass-Based Geopolymers Supplemented With Alumina, Mary U. Christiansen
Dissertations, Master's Theses and Master's Reports - Open
An increased consideration of sustainability throughout society has resulted in a surge of research investigating sustainable alternatives to existing construction materials. A new binder system, called a geopolymer, is being investigated to supplement ordinary portland cement (OPC) concrete, which has come under scrutiny because of the CO2 emissions inherent in its production.
Geopolymers are produced from the alkali activation of a powdered aluminosilicate source by an alkaline solution, which results in a dense three-dimensional matrix of tetrahedrally linked aluminosilicates. Geopolymers have shown great potential as a building construction material, offering similar mechanical and durability properties to OPC. Additionally, geopolymers have …
A Novel Approach To Carbon Dioxide Capture And Storage, Brett P. Spigarelli
A Novel Approach To Carbon Dioxide Capture And Storage, Brett P. Spigarelli
Dissertations, Master's Theses and Master's Reports - Open
The novel approach to carbon capture and storage (CCS) described in this dissertation is a significant departure from the conventional approach to CCS. The novel approach uses a sodium carbonate solution to first capture CO2 from post combustion flue gas streams. The captured CO2 is then reacted with an alkaline industrial waste material, at ambient conditions, to regenerate the carbonate solution and permanently store the CO2 in the form of an added value carbonate mineral. Conventional CCS makes use of a hazardous amine solution for CO2 capture, a costly thermal regeneration stage, and the underground storage …
Performance-Based Engineering Framework For Earthquake And Fire Following Earthquake, Aerik Carlton
Performance-Based Engineering Framework For Earthquake And Fire Following Earthquake, Aerik Carlton
Dissertations, Master's Theses and Master's Reports - Open
The objective for this thesis is to outline a Performance-Based Engineering (PBE) framework to address the multiple hazards of Earthquake (EQ) and subsequent Fire Following Earthquake (FFE). Currently, fire codes for the United States are largely empirical and prescriptive in nature. The reliance on prescriptive requirements makes quantifying sustained damage due to fire difficult. Additionally, the empirical standards have resulted from individual member or individual assembly furnace testing, which have been shown to differ greatly from full structural system behavior. The very nature of fire behavior (ignition, growth, suppression, and spread) is fundamentally difficult to quantify due to the inherent …
The Laboratory Evaluation Of Bio Oil Derived From Waste Resources As Extender For Asphalt Binder, Xu Yang
The Laboratory Evaluation Of Bio Oil Derived From Waste Resources As Extender For Asphalt Binder, Xu Yang
Dissertations, Master's Theses and Master's Reports - Open
A shortage of petroleum asphalt is creating opportunities for engineers to utilize alternative pavement materials. Three types of bio oils, original bio oil (OB), dewatered bio oil (DWB) and polymer-modified bio oil (PMB) were used to modify and partially replace petroleum asphalt in this research. The research investigated the procedure of producing bio oil, the rheological properties of asphalt binders modified and partially replaced by bio oil, and the mechanical performances of asphalt mixtures modified by bio oil. The analysis of variance (ANOVA) is conducted on the test results for the significance analysis. The main finding of the study includes: …
Stilling Basin Scour Remediation Using Air Injection And Flat Plate Extension, Rachael Barlock
Stilling Basin Scour Remediation Using Air Injection And Flat Plate Extension, Rachael Barlock
Dissertations, Master's Theses and Master's Reports - Open
The South Florida Water Management District (SFWMD) is responsible for managing over 2500 miles of waterways and hundreds of water control structures. Many of these control structures are experiencing erosion, known as scour, of the sediment downstream of the structure. Laboratory experiments were conducted in order to investigate the effectiveness of two-dimensional air diffusers and plate extensions (without air injection) on a 1/30 scale model of one of SFWMD gated spillway structures, the S65E gated spillway. A literature review examining the results of similar studies was conducted. The experimental design for this research was based off of previous work done …
Post-Project Assessment Of Pit Latrines In Rural Panama, Jacob B. Midkiff
Post-Project Assessment Of Pit Latrines In Rural Panama, Jacob B. Midkiff
Dissertations, Master's Theses and Master's Reports - Open
In Panama, one of the Environmental Health (EH) Sector’s primary goals is to improve the health of rural Panamanians by helping them to adopt behaviors and practices that improve access to and use of sanitation systems. In complying with this goal, the EH sector has used participatory development models to improve hygiene and increase access to latrines through volunteer managed latrine construction projects. Unfortunately, there is little understanding of the long term sustainability of these interventions after the volunteers have completed their service. With the Peace Corps adapting their Monitoring, Reporting, and Evaluation procedures, it is appropriate to evaluate the …
Structural Control Of A Small-Scale Test-Bed Shaker Structure Using A Sponge-Type Magneto-Rheological Fluid Damper, Benjamin D. Winter
Structural Control Of A Small-Scale Test-Bed Shaker Structure Using A Sponge-Type Magneto-Rheological Fluid Damper, Benjamin D. Winter
Dissertations, Master's Theses and Master's Reports - Open
Semi-active damping devices have been shown to be effective in mitigating unwanted vibrations in civil structures. These devices impart force indirectly through real-time alterations to structural properties. Simulating the complex behavior of these devices for laboratory-scale experiments is a major challenge. Commercial devices for seismic applications typically operate in the 2-10 kN range; this force is too high for small-scale testing applications where requirements typically range from 0-10 N. Several challenges must be overcome to produce damping forces at this level. In this study, a small-scale magneto-rheological (MR) damper utilizing a fluid absorbent metal foam matrix is developed and tested …
Determing The Effect Of Thermal Treatment Timing On Ultra-High Performance Concrete Beams, Christopher H. Mullen
Determing The Effect Of Thermal Treatment Timing On Ultra-High Performance Concrete Beams, Christopher H. Mullen
Dissertations, Master's Theses and Master's Reports - Open
The loss of prestressing force over time influences the long-term deflection of the prestressed concrete element. Prestress losses are inherently complex due to the interaction of concrete creep, concrete shrinkage, and steel relaxation. Implementing advanced materials such as ultra-high performance concrete (UHPC) further complicates the estimation of prestress losses because of the changes in material models dependent on curing regime.
Past research shows compressive creep is "locked in" when UHPC cylinders are subjected to thermal treatment before being loaded in compression. However, the current precasting manufacturing process would typically load the element (through prestressing strand release from the prestressing bed) …
Evaluation Of Intelligent Compaction Control In The M-189 Reconstruction Project At Iron River, Michigan, Junhong Li
Evaluation Of Intelligent Compaction Control In The M-189 Reconstruction Project At Iron River, Michigan, Junhong Li
Dissertations, Master's Theses and Master's Reports - Open
This research evaluated an Intelligent Compaction (IC) unit on the M-189 highway reconstruction project at Iron River, Michigan. The results from the IC unit were compared to several traditional compaction measurement devices including Nuclear Density Gauge (NDG), Geogauge, Light Weight Deflectometer (LWD), Dynamic Cone Penetrometer (DCP), and Modified Clegg Hammer (MCH). The research collected point measurements data on a test section in which 30 test locations on the final Class II sand base layer and the 22A gravel layer. These point measurements were compared with the IC measurements (ICMVs) on a point-to-point basis through a linear regression analysis. Poor correlations …
Development Of A 2-Dimensional Finite Volume Model To Assess Hydrodynamic And Microbial Controls On Dnapl Dissolution And Detoxification, Eric S. Wesseldyke
Development Of A 2-Dimensional Finite Volume Model To Assess Hydrodynamic And Microbial Controls On Dnapl Dissolution And Detoxification, Eric S. Wesseldyke
Dissertations, Master's Theses and Master's Reports - Open
Tetrachloroethene (PCE) and trichloroethene (TCE) form dense non-aqueous phase liquids (DNAPLs), which are persistent groundwater contaminants. DNAPL dissolution can be "bioenhanced" via dissolved contaminant biodegradation at the DNAPL-water interface. This research hypothesized that: (1) competitive interactions between different dehalorespiring strains can significantly impact the bioenhancement effect, and extent of PCE dechlorination; and (2) hydrodynamics will affect the outcome of competition and the potential for bioenhancement and detoxification. A two-dimensional coupled flowtransport model was developed, with a DNAPL pool source and multiple microbial species. In the scenario presented, Dehalococcoides mccartyi 195 competes with Desulfuromonas michiganensis for the electron acceptors PCE and …
Preliminary Investigation Of Ultra-High Performance Concrete Behavior At High Strain Rates Using The Split-Hopkinson Pressure Bar, Jacob Clark
Dissertations, Master's Theses and Master's Reports - Open
Ultra-high performance concrete (UHPC) displays several enhanced material properties compared to normal strength concrete (NSC). In past research, Split-Hopkinson pressure bar (SHPB) tests have been used for normal strength concrete to determine material behavior at high strain rates. The behavior of advanced concrete materials, such as UHPC, under high strain rates has not been thoroughly investigated. While it is generally accepted that concrete materials experience increases in compressive strength under increasing strain rates, a preliminary investigation was conducted to gain insight into the compressive behavior of UHPC under high strain rate SHPB testing.
In this research, 50 specimens were tested …
Terpene And Terpenoid Emissions And Secondary Organic Aerosol Production, Rosa M. Flores
Terpene And Terpenoid Emissions And Secondary Organic Aerosol Production, Rosa M. Flores
Dissertations, Master's Theses and Master's Reports - Open
Approximately 90% of fine aerosol in the Midwestern United States has a regional component with a sizable fraction attributed to secondary production of organic aerosol (SOA). The Ozark Forest is an important source of biogenic SOA precursors like isoprene (> 150 mg m-2 d-1), monoterpenes (10-40 mg m-2 d-1), and sesquiterpenes (10-40 mg m-2d-1). Anthropogenic sources include secondary sulfate and nitrate and biomass burning (51-60%), vehicle emissions (17-26%), and industrial emissions (16-18%). Vehicle emissions are an important source of volatile and vapor-phase, semivolatile aliphatic and aromatic hydrocarbons that are important …
Characterization Of A Coal Fly Ash-Cement Slurry By The Absolute Foam Index, Melanie Kueber Watkins
Characterization Of A Coal Fly Ash-Cement Slurry By The Absolute Foam Index, Melanie Kueber Watkins
Dissertations, Master's Theses and Master's Reports
This dissertation established a standard foam index: the absolute foam index test. This test characterized a wide range of coal fly ash by the absolute volume of air-entraining admixture (AEA) necessary to produce a 15-second metastable foam in a coal fly ashcement slurry in a specified time. The absolute foam index test was used to characterize fly ash samples having loss on ignition (LOI) values that ranged from 0.17 to 23.3 %wt. The absolute foam index characterized the fly ash samples by absolute volume of AEA, defined as the amount of undiluted AEA solution added to obtain a 15-minute endpoint …