Fall 2014 Seminars and Thesis Presentations

The CENE graduate student seminar series is usually held the 2nd and 4th Wednesdays of every month from 4:00-4:50 pm in CB204W. The SDSM&T and engineering community are welcome to attend. Professional development hour (PDH) certificates can be mailed to attendees upon request for the seminars noted below. For more information, contact Dr. Soonkie Nam (Soonkie.Nam@sdsmt.edu).

Fall 2014 Schedule 

Wednesday, September 10, 2014

Offshore Met-mast HeMOSU-2 with Suction Bucket Foundation 
Moosung Ryu, Senior Researcher, Korea Electric Power Corporation Research Institute (KEPRI)
ABSTRACT: This talk will address the design and installation of a meteorological tower, HeMOSU-2, in Korea. HeMOSU-2 is planned for installation in the area of future offshore wind farms in order to get requisite data for offshore wind farm design such as wind profile, wave strength and frequency, current, temperature, atmospheric pressure, marine growth, etc. HeMOSU-2 adopted a suction bucket foundation which uses the differential water pressure between the inside and outside of a caisson as the driving force. Consequently, there is no noise, vibration, or floating particles induced by hammering during the installation. Through this project, KEPRI (Korea Electric Power Corporation Research Institute) has had good achievements in cost savings equivalent to 1 million US dollars and a tremendous reduction on installation time. On the basis of this experience, KEPRI is planning to apply the suction bucket to offshore wind turbine (3MW) foundations. This 20-million dollar project is now at the final approval stage and will begin next year. We hope that this project contributes to the improvement of economic efficiency of offshore wind power in Korea. KEPRI deeply appreciates the technical advice from Dr. Bang for the HeMOSU-2 project and also thanks the Department of Civil & Environmental Engineering at SDSM&T for all their support.
**PDH Credit Available

Tuesday, September 23, 2014 **CM 310 4:00-5:00 p.m.

Environmental Forensics
Larry Schmaltz, PE (CE '79), Florida Operations Manager & National Program Manager at Apex Companies, LLC
BIO:  Larry Schmaltz has over thirty years’ experience in engineering and construction management with the past twenty-four years devoted to the hazardous materials industry. During his career he has been responsible for well over $100 million of assessment and remediation projects for commercial, industrial and governmental clients. In addition to general management duties, he is also responsible for overseeing all technical and project management aspects of projects including Phase I & II Assessments, Contamination Assessments, Remedial Action Plan development and implementation, Underground Tank Removals and Remediation, Closure Assessments, Asbestos Consulting and Abatement, General Environmental and Civil Engineering, Property Physical Condition Assessments, Site Development Permitting, Forensic Studies, and Water Resources Engineering.
ABSTRACT:  Forensics is the use and interpretation of scientific data to determine the cause or source of an outcome. Just as the crime scene investigators use forensics to determine who committed a crime, environmental engineers can likewise use forensics to determine the source of contamination. From the most basic analytical methods to complex chemistry, environmental forensics can be used to find the responsible party for a contaminated site, or to apportion a mixed contaminant plume. This lecture will review some of the more common methods of environmental forensic science and show case studies where forensics have been used to determine a contaminant source.
**PDH Credit Available

Wednesday, October 8, 2014

No Seminar
In lieu of a seminar on Oct. 8th, you are encouraged to register and attend the South Dakota Engineering Society Annual PDH Meeting to be held on October 9th on the SD Mines campus. For more information, contact Gail Boddicker (gail.boddicker@sdsmt.edu) or visit http://www.sdes.org/event-1732144. Students may register for free. 

Wednesday, October 22, 2014

Geotechnical Investigation of the Silver Street interchange in Rapid City, SD including I-190, Silver Street, West Boulevard and multiple on and off ramps.
Christopher W. Leibrock, PE (BSCE‘09, MSCE‘10), South Dakota Department of Transportation Foundation Group
ABSTRACT: This project is currently in the design phase and has not been let. This project includes grading, PCC surfacing, bridge structures, multiple retaining walls, slope stability, soil nail walls, curb & gutter, box culvert, storm sewer, signals, lighting, pavement marking and right of way. A significant undertaking is currently on-going throughout many divisions of the SDDOT to complete work for the Silver Street interchange. HDR Inc. is also under contract to complete many additional portions of the project.

Within the Geotechnical Activity a large number of tasks are currently being undertaken. The majority of work for the geotechnical investigation is being completed by the SDDOT. The scope of work requires investigations of piling depth for the bridge structure, settlement and footings for the retaining walls, subsurface soils for the pavements, lateral bearing for signals and lighting, rebound at excavations for the box culvert and new roadway due to highly expansive shale’s and corrosion investigations for all bare steel placed underground. This project combines many different aspects of Geotechnical investigation, analysis and design and has provided a challenge for the Geotechnical Activity to complete within a short time frame and limited resources.
**PDH Credit Available

Wednesday, November 5, 2014

The SDSMT Student Wellness and Recreation Center – A Student led Project
Robert Morcom
, PE, TSP and Chris Heiser, PE, TSP
BIO: Robert Morcom, P.E. – Managing Principal with TSP, Inc. and Principal in Charge of the SDSMT Wellness and Recreation Center Project.  Bob graduated from SDSMT in 1974 with a BS in Civil Engineering and from the University of Wyoming in 1976 with a BS in Industrial Management.  He has over 38 years of experience in the consulting and construction industry and has been with TSP for 26 years of which he serves as on the Board of Directors and as Head of the Civil Engineering Department.  He is a registered professional engineer in 9 states.

BIO: Chris Heiser, P. E. – Chris is the Project Manager for the SDSMT Wellness and Recreation Center Project. Chris graduated from SDSU in 1996 with a BS in Civil Engineering with and emphasis in Structural Engineering. He graduated from SDSMT in 2006 with an MS in Structural Engineering, is the Structural Engineering Department Head, and an Associate Principal with TSP.  Chris started his engineer career in 1996 in Rapid City and  has been with TSP for 18 years. He is a registered profession engineer in 9 states.

ABSTRACT: The program will highlight the overall history of developing the Student Wellness and Recreation Center at SDSMT and how the students were the leaders in making this a possibility to be programed through SDSMT and  Office of the State Engineer.  The program will be broken into two areas. The first area will highlight the overall development of the design program that was developed through a collaborative effort with SDSMT, the OSE, the Student Association and various representatives, various focus groups including the Student, Foundation, Student Affairs, Athletics, Facility, City, and the Architect/Engineering Team of TSP, Inc. and RGD.   It will summarize the initial Facility Statement and review the process that went into developing the final contract documents that were bid and are currently under construction.  The second area will discuss the progress of the project currently under  construction and highlight the design and construction challenges and solutions. 
**PDH Credit Available 

Thursday, November 13, 2014 **CM 310 12:00 – 1:00 p.m.

MS CENE Thesis Defense: The Impact of Biodegradable Fibers as Reinforcement in Sand Subject to Biocalcification to Reduce Wind Erosion Potential
Emily Martinez (EnvE’13), Graduate Research & Teaching Assistant at SDSM&T

ABSTRACT:  A novel approach to dust suppression optimization in sand was researched through the combination of presoaked biodegradable fiber reinforcement and microbiologically induced calcite precipitation.  To enhance the wind erosion mitigation potential, three biodegradable fibers including Manila hemp, corn husks, and cotton threads were tested under two scenarios, presoaked with water or Urea Nutrient Broth medium with 100 mM CaCO3. Each reinforcement scenario was tested under varying medium concentrations and was subject to wind speeds of 20, 30 and 40 mph.  The effectiveness of the fiber addition and the amount of medium was analyzed based on their respective dry weight mass losses. It was hypothesized that presoaking the fibers in water would allow a microorganism, Sporosarcina pasteurii ATCC 11859, to have medium more readily available, inducing more calcite precipitation, and therefore, a more effective process than what has been previously studied. Furthermore, presoaking the fibers in medium was expected to accelerate the rate and amount of calcite precipitation through increased chemical and microbial precipitation. However, results indicated that unless there was a large concentration of medium and bacteria, presoaking the fibers inhibited calcite precipitation. Therefore, the higher the fiber absorption capacity, the more effective fiber presoaking was. Ethylenediaminetetraacetic acid (EDTA) titration data enhanced this finding with a positive correlation between the fiber absorption capacity and the insoluble calcium ion levels. Lastly, for an environmentally conscious application of fiber reinforcement, the performance of biodegradable polymers was compared to previous research on synthetic fibers. Overall, synthetic fibers offered the best wind erosion mitigation potential when compared to all other methods.

Monday, November 17, 2014 **McKeel Room Surbeck Center 9:00 – 10:00 a.m.

MS CENE Thesis Defense: Climate and Groundwater Data to Support Mechanistic-Empirical Pavement Design in South Dakota
Brian Ruppelt
, EIT (CE ’13), Graduate Research & Teaching Assistant at SDSM&T

ABSTRACT:  Climate can have a significant impact on pavement performance.  Accurate climate data is very important when estimating pavement distresses over time.  Pavements are most sensitive to changes in air temperature.  Accurate climate data can lead to a more reliable pavement design.  A more reliable pavement design lasts longer and can lead to saving money over the life of the pavement.  Climate data for use in the Mechanistic-Empirical Pavement Design Guide (MEPDG) software should be accurate as well as have good spatial coverage, be quality controlled, and span a large time period.  This climate data is used with material, pavement structure, and traffic properties to determine the response and damage accumulation of the pavement.  This results in pavement distresses for the design life of the pavement.
      This study involved a sensitivity analyses to determine which climate input has the most impact on pavement performance.  These climate inputs include:  air temperature, wind speed, percent sunshine, precipitation, and relative humidity.  Three pavements were analyzed for this sensitivity analyses:  rural asphalt concrete, rural jointed plain concrete pavement, and a rehabilitation of asphalt concrete over rubblized concrete.  Air temperature proved to have the largest impact on each of these pavement structures.  A comparison analyses was then completed to determine how the three different weather data sources compared when used in the MEPDG software.

Wednesday, November 19, 2014 **Dorr Room Surbeck Center 9:00 – 10:00 a.m.

MS CENE Thesis Defense:  Remediation of Acid Mine Drainage Using Recycled Concrete Aggregate and Fly Ash
Stephanie Jones
, EIT, Graduate Research Assistant at SDSM&T

ABSTRACT:  Acid mine drainage (AMD) is one of the most environmentally degrading byproducts of modern mining practices.  It is characteristically acidic and often contains toxic concentrations of elements that can devastate aquatic ecosystems by a multitude of pathways.  Current remediation practices can be extremely expensive, requiring continuous chemical treatment and large volumes of virgin material.  The objective of this study was to evaluate the use of low-cost construction waste products, fly ash and recycled concrete aggregate (RCA), in remediating AMD.  Column leach tests (CLTs) and batch water leach tests (WLTs) were conducted to evaluate the impact of the materials on the chemical properties and metal concentrations of AMD.

CLTs showed that dissolution of Ca and other alkali contributing minerals in the RCAs and fly ashes increased alkalinity and pH of AMD generated from mine waste.  X-ray fluorescence spectroscopy (XRF) and inductively coupled plasma-mass spectrometry (ICP-MS) revealed that Cr, Cu, Fe, Mg, Mn, and Zn were precipitated out of AMD as oxides and hydroxides, and adsorbed to RCA and fly ash particles.  Cu, Zn, and Mn concentrations in the treated AMD were below the EPA’s maximum contaminant levels for secondary drinking water quality. WLTs with varied particle size fractions of the RCAs showed that leaching of Cr and Cu increased with decreasing particle size, and increasing element and oxide content.  Leaching of Ca, Mg, Mn, Zn, and Fe appeared dependent on element and oxide content of individual particle size fractions.  WLTs with the fly ashes demonstrated that the chemical composition of fly ashes can be highly variable, resulting in unique leaching patterns from different samples of the same material.

Wednesday, November 19, 2014 **CB204W 4:00 p.m.

MS CENE Thesis Defense: Effects of Adding Agricultural Byproducts on the Shear Strengths of Sand and Fine-grained Soils
Karen Schaefers, EIT (CE ’11), Graduate Research & Teaching Assistant at SDSM&T

ABSTRACT:  Acquiring good quality soil is one of the major factors contributing to higher construction costs.  Improving poor soils with stabilizing agents by either mechanical or chemical means has proven to be more economical and environmentally friendly for many types of construction tasks.  Industry presents a multitude of options for chemical stabilization of soils; however, proper implementation of these stabilizers is not always well understood with varying soil types requiring further testing to determine the most effective application rates.  Polymers have potential as stabilizers because fiber, a byproduct from food milling processes, can be used due to its adsorptive characteristics.  As an agricultural byproduct, integration of this substance into soils could potentially eliminate waste and provide an unlimited supply of material to exploratory research.  The primary goal of this study is to identify the stabilizing effects of the agricultural byproducts, pea bran and lentil bran, on sand and local fine-grained soil.  Material properties of the untreated soils and the mixtures of the soils with agricultural byproducts including compaction characteristics were identified.  The two soils were mixed with three types of bran at dosages of 5, 10, and 15% by dry weight. Direct shear tests were then conducted to determine the shear strength of the soils stabilized with the byproducts at curing periods of 0, 3, 7, 14, 28, and 56 days.  Liquid chemical stabilizers were also incorporated with the initial intent of increasing strength of modified soils and after further deliberation, to reduce the biological activity occurring in the specimens.  The hygroscopic salts, magnesium chloride and calcium chloride, were incorporated at 3% by weight, which did induce a visual reduction in the biological activity and showed positive strength gains of direct shear specimens when compared to the untreated materials.

Tuesday, December 2, 2014 **CB327 11:15 a.m.

MS CENE Thesis Defense:  Applications of Life Cycle Assessment Modeling for Environmental, Water Resources, and Agricultural Processes States
Tyler Hengen, Graduate Research Assistant at SDSM&T

ABSTRACT:  Significant environmental impacts attributable to beef production in a feedlot, such as the environmental burden of producing feeds, transporting feeds, and emission associated with beef cattle themselves, make it necessary to develop a method to quantitatively evaluate and predict the environmental impacts of the various aspects of beef feedlot production.  A predictive eco-efficiency model was developed to dynamically assess the impacts of varying dietary rations in a feedlot setting for beef cattle.  The hybridized model utilized California Net Energy System modeling, life cycle assessment (LCA), principal component analysis (PCA), and economic analysis.  The model approach was based on 38 distinct feedlot rations and 4 different transportation scenarios for each ration to determine the appropriate ‘weight’ of each of the applicable environmental impact categories.  Each ration was first assessed for the predicted time required within the feedlot from 317 kg to 600 kg market weight.  Following ISO 140440 protocol, the LCA model evaluated beef production via a “cradle to grave” approach, including feed production and processing, feed transportation, enteric emissions, and manure emissions and handling, feedlot water usage, and feedlot energy usage. After the LCA was completed, all applicable LCA-environmental impact in addition to cattle emissions were assessed through PCA to determine the relative contributing weight of each impact category to the overall environmental impact of the beef production.  The PCA output was evaluated using a eco-efficiency model, allow feedlot managers to define a specific feedlot ration to be fed, and the model would then deliver the expected beef performance results, as well as the overall environmental and economic implications for the ration as a weighted score.

For all of the impact categories, it was found that air, soil, and human health emissions were the primary drivers for the eco-efficiency scoring, while water emissions and resource depletion played the least significant role in the overall eco-efficiency analysis.  A significant amount of variability from the contributing environmental impacts existed within each of the environmental impact categories, emphasizing the role that active feed selection and management plays in environmental pollutant contributions from these feedlot operations.  It was clear through the analysis that scenarios utilizing high energy feeds tended to have high environmental impacts, deriving from higher cattle emissions and mechanical energy emissions associated with processing.  However, it was found that feeds requiring lower processing energy tended to be low in dietary energy and inefficient with regard to the time on feed.  As a result, cattle were projected to spend an increasing amount of time in the feedlot typically, as higher amounts of low or no-processed foods were included in the rations.

Wednesday, December 3, 2014

Title:  To Be Announced
Mike Hansen, Kiewit Infrastructure, Co. Project Manager