Civil Engineering Commons^™

Mitigating Moisture Susceptibility In Hot-Mix Asphalt Concrete, Tom P. Nguyen

Master's Theses

Moisture damage in asphalt pavement has always been a problem for drivers, bicyclists, and pedestrians. The primary objective of this study is to evaluate moisture susceptibility of Hot-Mix Asphalt (HMA) and to investigate mitigation techniques using different antistripping agents. Three types of antistripping agents were used in this research investigation. Two of which are chemical based and the other is hydrated lime. The two types of liquid antistripping agents used in this study include Arr Maz CC LOF-6500 and Arr Maz CC XL-9000. These two liquid antistripping agents were tested at 0.25%, 0.50%, and 0.75%. Hydrated Lime was tested at …

Optimization Of Point-Of-Use Water Treatment Device For Disaster Relief, Margaret June Herzog

Master's Theses

Point-of-use (POU) drinking water treatment is a common method of providing drinking water in disaster relief situations when critical water infrastructure is damaged. In these cases, POU treatment devices can be used to treat local water until relief organizations set up more permanent water provision methods. One such POU technology is PŪR^® Purifier of Water, a combined coagulation/flocculation and disinfection chemical treatment sachet produced by Procter & Gamble. PŪR^® has been shown to treat contaminated water to meet water quality standards and guidelines set by the U.S. EPA for water purifiers and by the World Health Organization and …

Influence Of Nozzle Pressure, Standoff Distance, And Reinforcing Steel Cage On Water Jetting Of Cidh Pile Anomalies, Matthew Jason Schaffer

Master's Theses

The effectiveness of removing anomalous material from cast-in-drilled-hole (CIDH) piles by water jetting was examined.  The primary objectives of this research were to examine how reinforcing steel influences water jetting and to evaluate how jetting pressures and standoff distance from the material surface affect water jetting of concrete type materials and PVC tubing.  The experimental work consisted of water blasting submerged test specimens using rotary jets, nozzles, pumping equipment, and testing procedures currently used in construction practice.  The concrete test specimens were comprised of ring- and cylinder-shaped samples, containing materials with compressive strengths of approximately 160 and 3,600 psi.  Typical …

Bs News March/April

Building Services Engineering

No abstract provided.

A Petri Net Simulation Model For Virtual Construction Of Earthmoving Operations, F. F. Cheng, Y. W. Wang, Yong Bai

Civil and Environmental Engineering Faculty Research and Publications

A common and extended Petri net simulation framework for virtual construction of earthmoving operations is developed to simulate dynamic changes of workflow and information flow in the earthmoving construction process and illustrate the constraint relationship between various operational equipment and construction restrictions. The proposed framework considers factors that influence earthmoving operations including randomness of construction activities, individual preference of equipment scheduling, and constraint relationship between equipment and construction environment. With the given equipment availability and project indirect cost, the framework can predict construction situation, equipment utilization rate, estimated duration and cost to achieve visualized and intelligent scheduling of virtual construction …

On The Interaction Between Bathymetry And Climate In The System Dynamics And Preferred Levels Of The Great Salt Lake, Ibrahim Nourein Mohammed, David G. Tarboton

Civil and Environmental Engineering Faculty Publications

The Great Salt Lake is a terminal lake whose level is determined by the balance between inflows and outflows. We examine the causes for multimodality in the distributions of lake level and hence volume and area that have previously been examined from a system dynamics perspective. We focus on the role of bathymetry in the dynamics of this system and show that some of the modes that are observed and that represent preferred system states are attributable to features of the bathymetry described using the topographic area‐volume relationship. Being a terminal lake, the only “outflow” is evaporation, which depends directly …

Meeting Engineering Program Objectives Through Service Learning Opportunities In Developing Countries, Jeffrey M. Plumblee, Lansford Bell, Leidy E. Klotz

Publications

The civil engineering profession, in an adaptive reaction to emerging roles for civil engineers, is recognizing the need for new engineers to possess a more robust skill set than just the typical design background. This paper describes the efforts of Clemson Engineers for Developing Countries (CEDC) to fulfill the more nontraditional and often unaddressed “learning outcomes” noted by ASCE’s Civil Engineering Body of Knowledge for the 21st Century as important prerequisites for licensure. The learning outcomes are addressed through ongoing international service learning projects in Cange, Haiti. The paper focuses on the following four outcomes and their fulfillment methods: leadership, …

Health, Transportation, And The Built Environment: Building A Roadmap For Change With Smaller Cities, Cynthia Carlson, Semra Aytur, Kevin Gardner, Shannon Rogers

Civil Engineering Faculty Publications

Presentation at the 2011 Active Living Research Annual Conference.

Development Of An Open Source Bridge Management System, Michael H. Scott

TREC Final Reports

A bridge management system is developed using the Tcl scripting language in conjunction with the OpenSees finite element software framework. Fully programmable and string-based, Tcl is ideal for implementing live load analysis through scripts and experimenting with emergent bridge rating methodologies. Since Tcl is an interpreted language, the application also has the important advantage that new bridge capacity models and rating factor calculations can be implemented on multiple platforms without compiling source code. The network programming features of Tcl give the system access to databases for conducting internet-based bridge rating. The system is demonstrated for rating a conventionally reinforced concrete …

A Microsimulation Of Traffic, Parking, And Emissions At California Polytechnic State University – San Luis Obispo, Steven Michael Kilbert

Master's Theses

Traffic and parking congestion are significant issues at many universities nationwide. The delays experienced result in wasted time, money, and fuel for students, faculty and staff, not to mention the negative contributions to the environment. This paper quantifies the amount of vehicle emissions generated during an average morning peak hour in the university environment. Using VISSIM and CMEM microsimulation packages, a model is created for California Polytechnic State University- San Luis Obispo to aggregate the collective transportation behaviors and practices of the campus and recognize the implications these behaviors pose on the transportation network as a whole. Reasonable estimates are …

Understanding The Impact Of Indot Projects On Automotive Industry Cluster Logistics Costs: A Case Study Of The Honda Plant, Ananth Iyer, Barry K. Partridge, Mary Pilotte, Pete Mast, Gerald Simms

JTRP Technical Reports

No abstract provided.

Risk Based Models For The Optimization Of Oil And Gas Supply Chain Critical Infrastructure, Kingsley Oseloka Achebe

Dissertations

The oil and gas sector faces a broad array of risks and uncertainties, affecting short- and long-term planning, and causing adverse effects in the energy sector. To predict and minimize them, risk based supply chain models were developed for the oil and gas supply chain critical infrastructure.

First, the events and activities were categorized as short term and long term, and their risk ratings derived, by analyzing data from past events and site visits. The result showed that events like the Israel – Arab war, successful hurricane, and production increase or decrease, had a risk rating of approximately 7.

Second, …

Seismic Characterization Of Recycled Aggregate Concrete, Amin Jamali

Dissertations

There are significant environmental benefits of recycling waste concrete and reusing it as aggregate for structural concrete, but the use of Recycled Aggregate Concrete (RAC) is yet limited to non-structural applications such as road sub-base. Widespread application of RAC in areas such as seismic design requires an improved knowledge of RAC behavior under multiaxial state of stresses.

The main objective of this research is the characterization of seismic properties of RAC by developing a stress-strain model which can reasonably describe the behavior under both unconfined and confined conditions. An extensive experimental program, including testing of several plain RAC cylinders as …

Application Of Mass/Stiffness Eccentricity To Control Response Of Structures Subjected To Earthquake Ground Motion, Bakhtiar Feizi

Dissertations

This dissertation is driven by the concept that engaging more modes in the response of structures can be used to mitigate its translational dynamic response. One such an approach is to engage torsional modes through engineered eccentricity (mass/stiffness eccentricity), thus, introducing coupled translation-rotation response. This idea was first introduced in a paper published by MacBain and Spillers in 2004. As a follow up to the same idea this dissertation was an attempt to investigate and develop the theory concerning the application of mass/stiffness eccentricity to control the translational motion of structures subjected to earthquake ground motion.

Different discrete and continuous …

Developing Deterioration Models For Nebraska Bridges, George Morcous Ph.D., Afshin Hatami Ph.D.

Mid-America Transportation Center: Final Reports and Technical Briefs

Nebraska Bridge Management System (NBMS) was developed in 1999 to assist in optimizing budget allocation for the maintenance, rehabilitation and replacement needs of highway bridges. This requires the prediction of bridge deterioration to calculate life-cycle costs. At the meantime, the approach adopted to predict the deterioration of bridge components is based on national average deterioration rates, which are one drop in the deck condition rating every eight years and one drop in the superstructure and substructure condition rating every ten years. This approach does not account for the impact of traffic volume, structure and material type, and environment impacts, in …

Crash Analysis Of I-64 Closure In St. Louis County, Ghulam H. Bham Ph.D., Uday R.R Manepalli

Mid-America Transportation Center: Final Reports and Technical Briefs

On January 2, 2008, the Missouri Department of Transportation (MoDOT) closed significant portions of Missouri Interstate 64 (I-64) in St. Louis County for reconstruction. During the planning stages of this project, the proposal to close all lanes of I-64 was met with public concern regarding the possible safety risks associated with diverting I-64 traffic to adjacent roadways. A specific concern was the possibility of increased crash rates on roads designated to receive I-64 traffic flow. The following research was conducted to assess the actual outcomes related to these concerns. Crash analyses and crash rate analysis of 2008 and 2009 crash …

Performance Measures Of Warm Asphalt Mixtures For Safe And Reliable Freight Transportation Phase Ii: Evaluation Of Friction And Raveling Characteristics Of Warm Mix Asphalt Mixtures With Anti-Stripping Agents, Hosin David Lee Ph.D., P.E., Yongjoo Thomas Kim Ph.D.

Mid-America Transportation Center: Final Reports and Technical Briefs

The viscosity of asphalt decreased significantly when 0.5% of WMA additive was added,but it remained relatively steady as the dosage rate increased up to 3.0%. The reduction pattern in viscosity as the dosage rate increases was similar for both CECABASE RT® and LEADCAP at all test temperatures of 120°C,125°C, 130°C and 135 °C and a similar pattern was observed for both Sasobit® and Rediset. Based on the ABCD test device, the virgin asphalt binder PG 64-34 cracked at -51.0°C and the PG 64-28 cracked at -41.3°C. As the WMA additives were increased from 0.5%to 3.0%, the cracking temperatures increased slightly,but …

Assessing The Damage Potential In Pretensioned Bridges Caused By Increased Truck Loads Due To Freight Moments (Phase Ii), Robert J. Peterman Ph.D., P.E., Steven F. Hammerschmidt M.S.C.E.

Mid-America Transportation Center: Final Reports and Technical Briefs

With aging and deterioration of bridges, evaluation of existing conditions of their structural elements becomes vital to engineers and public officials when deciding how to repair or replace the structures. The ability to obtain necessary information on these conditions is often expensive and time consuming, especially for concrete bridges where the reinforcement is not available for inspection. Employing the surface-strain relief method could allow for accurate evaluation of aged or damaged prestressed members. The surface-strain relief method was developed to measure initial or pre-existing strains in a concrete member. It involves relieving the strain in the member and measuring the …

Effectiveness Study On Temporary Pavement Marking Removals Methods, Dr. Yong Cho, Dr. Jae-Ho Pyeon, Koudous Kabassi

Mid-America Transportation Center: Final Reports and Technical Briefs

This study was conducted to identify effective temporary marking removal methods and procedures on concrete and asphalt pavements. Pavement markings provide guidance to road travelers and can lead to accidents when not properly removed. Current state guidelines on removal do not provide clear and objective methods of measurement. After testing the most common removal methods, this research concluded that removing markings by chemical was not only cost efficient, result-oriented, and effective compared to other methods, but it was also safe to the environment and road users. Finally, a baseline of measurements was developed by the research team for this project, …

A Financial Impact Assessment Of Ld 1725: Stream Crossings Presentation, New England Environmental Finance Center

Economics and Finance

This report looks at the potential financial impact of LD 1725 on the estimated 30,000 stream crossings in the State of Maine that would be affected by the law. Our research for this report included the analysis of nearly 2000 stream crossings and the data collection necessary for the development of extensive stream crossing replacement cost models. We found that the 1.2 bankfull requirements in LD 1725 would result in a 75% ‐ 250% increase in structure widths for stream crossing projects across the state. An upsize of this magnitude would increase the cost of replacing stream crossings statewide by …