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Application Of Shuffled Complex Evolution Optimization Approach To Concrete Pavement Backanalysis, Kasthurirangan Gopalakrishnan, Halil Ceylan 2010 Iowa State University

Application Of Shuffled Complex Evolution Optimization Approach To Concrete Pavement Backanalysis, Kasthurirangan Gopalakrishnan, Halil Ceylan

Civil, Construction and Environmental Engineering Conference Presentations and Proceedings

This paper focuses on the development of a new backcalculation method for concrete pavements based on a hybrid evolutionary global optimization algorithm, namely Shuffled Complex Evolution (SCE). Evolutionary optimization algorithms are ideally suited for intrinsically multi-modal, non-convex, and discontinuous real-world problems such as pavement backcalculation because of their ability to explore very large and complex search spaces and locate the globally optimal solution using a parallel search mechanism as opposed to a point-by-point search mechanism employed by traditional optimization algorithms. Shuffled Complex Evolution (SCE), a type of evolutionary optimization algorithms based on the tradeoff of exploration and exploitation, has been ...


Asphalt Modification By Utilizing Bio-Oil Esp And Tall Oil Additive, Sheng Tang 2010 Iowa State University

Asphalt Modification By Utilizing Bio-Oil Esp And Tall Oil Additive, Sheng Tang

Graduate Theses and Dissertations

Bio-oil is a dark-brown, mobile liquid derived from the thermo-chemical processing of biomass. Bio-oils generally contain water and lignin. Lignin is a highly-available, well-studied carbohydrate derivative known for its antioxidant properties. For asphalt pavements, oxidation can cause deterioration via long-term aging and eventually result in cracking. Therefore, bio-oil could potentially serve as an antioxidant additive in asphalt mixtures. The main objective of this research is to evaluate the effects of lignin-containing bio-oil for utilization in asphalt binders, and attempt to optimize the bio-oil modification formula by adding other additives. Using bio-oil as an antioxidant in asphalt production could prove to ...


Natural Selection Of Asphalt Mix Stiffness Predictive Models With Genetic Programming, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Halil Ceylan, Siddhartha K. Khaitan 2010 Iowa State University

Natural Selection Of Asphalt Mix Stiffness Predictive Models With Genetic Programming, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Halil Ceylan, Siddhartha K. Khaitan

Civil, Construction and Environmental Engineering Conference Presentations and Proceedings

Genetic Programming (GP) is a systematic, domain-independent evolutionary computation technique that stochastically evolves populations of computer programs to perform a user-defined task. Similar to Genetic Algorithms (GA) which evolves a population of individuals to better ones, GP iteratively transforms a population of computer programs into a new generation of programs by applying biologically inspired operations such as crossover, mutation, etc. In this paper, a population of Hot-Mix Asphalt (HMA) dynamic modulus stiffness prediction models is genetically evolved to better ones by applying the principles of genetic programming. The HMA dynamic modulus (|E*|), one of the stiffness measures, is the primary ...


Development Of Non-Petroleum Binders Derived From Fast Pyrolysis Bio-Oils For Use In Flexible Pavement, Mohamed Abdel Raouf Mohamed Metwally 2010 Iowa State University

Development Of Non-Petroleum Binders Derived From Fast Pyrolysis Bio-Oils For Use In Flexible Pavement, Mohamed Abdel Raouf Mohamed Metwally

Graduate Theses and Dissertations

Most bituminous adhesives or binders that are used for pavement materials are derived primarily from fossil fuels. Nevertheless, with petroleum oil reserves becoming depleted and the subsequent promotion to establish a bio-based economy, there is a drive to develop and produce binders from alternative sources, particularly from biorenewable resources. Recently, through the application of scientific research and development, a range of different vegetable oils have been investigated to determine their physical and chemical properties to study their applicability to be used as bio-binders in the pavement industry. Bio-binders can be utilized in three different ways to decrease the demand for ...


Effects Of Damping Device Nonlinearity On The Performance Of Semiactive Tuned Mass Dampers, C Lindh, Simon Laflamme, Jerome J. Connor 2010 Massachusetts Institute of Technology

Effects Of Damping Device Nonlinearity On The Performance Of Semiactive Tuned Mass Dampers, C Lindh, Simon Laflamme, Jerome J. Connor

Simon Laflamme

Studies have already demonstrated the successful use of linear semiactive damping devices, such as variable orifice (VO) dampers, for semiactive TMD systems. More recently, nonlinear semiactive damping devices, such as magnetorheological (MR) dampers, have also been shown to be effective for semiactive control of TMDs. Though semiactive dampers differ widely, with responses ranging from linear (VO) to nonlinear (MR), criteria for choosing an optimal semiacive device for a TMD have not been rigorously developed. This paper expands knowledge of semiactive TMD systems by assessing the effect of nonlinearity in the damping device on the effectiveness of a semiactive TMD. This ...


Large-Scale Capacitance Sensor For Health Monitoring Of Civil Structures, Simon Laflamme, Matthias Kollosche, Jerome J. Connor, Guggi Kofod 2010 Massachusetts Institute of Technology

Large-Scale Capacitance Sensor For Health Monitoring Of Civil Structures, Simon Laflamme, Matthias Kollosche, Jerome J. Connor, Guggi Kofod

Simon Laflamme

In this paper, a new type of sensing technique for damage localization on large civil structures is proposed. Specifically, changes in strain are detected using a capacitance sensor built with a soft-stretchable dielectric polymer with attached stretchable metal film electrodes. This sensor is sensitive to a change in strain that causes a change in its capacitance. Fixed to a structure, small changes in the strain can be monitored directly by measuring the change in the capacitance of the unit. This technology allows for simple yet highly accurate measurements of cracks occurring due to deformation, aging, or other structural failures. The ...


Integrated, Multi-Attribute Decision Support System For The Evaluation Of Underground Utility Construction Methods, John C. Matthews 2010 Louisiana Tech University

Integrated, Multi-Attribute Decision Support System For The Evaluation Of Underground Utility Construction Methods, John C. Matthews

Doctoral Dissertations

The dissertation research work described herein is comprised of three primary objectives: (1) the development of a rehabilitation method selection software (TAG-R) for the National Association of Sewer Service Companies (NASSCO) and its subsequent validation and combination with TAG (a sister decision support system (DSS) software developed by the author in an earlier work); (2) the development of a social cost calculator (SCC) and its validation; and (3) the development of a proposed framework for multi-segment optimization for construction methods selection using the tools developed in the first two objectives as well as additional project related data.

The selection of ...


Non-Destructive Evaluation Of In-Place Rehabilitated Concrete Pavements, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Halil Ceylan 2010 Iowa State University

Non-Destructive Evaluation Of In-Place Rehabilitated Concrete Pavements, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Halil Ceylan

Civil, Construction and Environmental Engineering Publications

Several in-place rehabilitation techniques have been used before placing an Asphalt Concrete (AC) overlay on Portland Cement Concrete (PCC) pavements in attempts to minimize reflection cracking. Among these techniques, "rubblization" of PCC has been recognized to be the most utilized procedure for the mitigation of reflection cracking in US. This paper presents the practices on the use of rubblization in US and discusses the performance of this technique based on field evaluation. The specifications for the rubblization procedure used by state Department of Transportation (DOT) in US were reviewed. To evaluate the performance of rubblization technique, the structural and the ...


Cost Effective Prevention Of Reflective Cracking In Composite Pavements, Rakesh Bandaru 2010 Louisiana State University and Agricultural and Mechanical College

Cost Effective Prevention Of Reflective Cracking In Composite Pavements, Rakesh Bandaru

LSU Master's Theses

Louisiana had experimented with various techniques and treatments to control reflection cracking since the 1970s; however, the cost-effectiveness and performance of these methods had not been reliably evaluated. In addition, scientific evaluation and testing of these treatment methods was not performed on many projects. To ensure successful control of this distress and effective allocation of maintenance funds, there is a critical need to assess the performance of pavement sections across the state built with various treatment methods and to determine the most cost-effective techniques to delay or to prevent reflection cracking in composite pavements. The objective of this study is ...


Studies Of Hydrophobic Organic Pollutant Interactions With Cyclodextrin: Implication For Groundwater Remediation, Heng Gao 2010 Louisiana State University and Agricultural and Mechanical College

Studies Of Hydrophobic Organic Pollutant Interactions With Cyclodextrin: Implication For Groundwater Remediation, Heng Gao

LSU Doctoral Dissertations

Henry’s Law constants of several common, subsurface hydrophobic organic pollutants (HOPs) including trichloroethylene (TCE), perchloroethylene (PCE) and benzene, toluene, ethylbenzene and o-xylene (BTEX), were measured over a range of temperatures (35, 45, 55 and 65°C) and cyclodextrin (CD) concentrations (0, 10, 20, 50 and 100 g L-1). In aqueous CD solutions, Henry’s constant values decrease by a power law relationship with increasing CD concentration due to an apparent solubility enhancement caused by HOP partitioning to the hydrophobic cavity of CD molecules. The temperature dependence of air-water partitioning under the influence of CD was well described by the ...


Chemical Compatibility Of Soil-Bentonite Cutoff Wall Backfills Containing Modified Bentonites, Matthew D. McKeehan 2010 Bucknell University

Chemical Compatibility Of Soil-Bentonite Cutoff Wall Backfills Containing Modified Bentonites, Matthew D. Mckeehan

Master’s Theses

This study examined the chemical compatibility of several model soil-bentonite(SB) backfills with an inorganic salt solution (CaCl2). First, bentonite-water slurry was created using a natural sodium-bentonite, as well as two modified bentonites –multiswellable bentonite (MSB) and a “salt-resistant” bentonite (SW101). Once slurries that met typical construction specifications had been created using the various bentonites,the model SB backfills were prepared for each type of bentonite. These backfills werealso designed to meet conventional construction and design requirements. The SB backfills were then subjected to permeation with tap water and/or CaCl2 solutions of various concentrations in order to evaluate the ...


Analysis Of The Florida's Showcase Green Envirohome Water/Wastewater Systems And Development Of A Cost-Benefit Green Roof Optimization Model, Brian Rivera 2010 University of Central Florida

Analysis Of The Florida's Showcase Green Envirohome Water/Wastewater Systems And Development Of A Cost-Benefit Green Roof Optimization Model, Brian Rivera

Electronic Theses and Dissertations

The Florida Showcase Green Envirohome (FSGE) incorporates many green technologies. FSGE is built to meet or exceed 12 green building guidelines and obtain 8 green building certificates. The two-story 3292 ft2 home is a "Near Zero-Loss Home", "Near Zero-Energy Home", "Near Zero-Runoff Home", and "Near Zero-Maintenance Home". It is spawned from the consumer-driven necessity to build a home resistant to hurricanes, tornadoes, floods, fire, mold, termites, impacts, and even earthquakes given up to 500% increase in insurance premiums in natural disaster zones, the dwindling flexibility and coverage of insurance policies, and rising energy, water and maintenance costs (FSGE 2008). The ...


Indiana Pavement Preservation Program, Ghim Ping (Raymond) Ong, Tommy E. Nantung, Kumares C. Sinha 2010 Purdue University

Indiana Pavement Preservation Program, Ghim Ping (Raymond) Ong, Tommy E. Nantung, Kumares C. Sinha

JTRP Technical Reports

State highway agencies are facing immense pressure to maintain roads at acceptable levels amidst the challenging financial and economic situations. In recent years, pavement preservation has been sought as a potential alternative for managing the pavement assets, believing that it would provide a cost-effective solution in maintaining infrastructural conditions and meeting user expectations. This study explores the potential of pavement preservation concepts in managing the agency‘s pavement assets by attempting to integrate pavement preservation considerations within the network-level pavement management system. Several elements are studied in the report: (i) determining triggers for pavement preservation treatments for use in a ...


Project Management For Complex Transportation Projects, John Owens 2010 Iowa State University

Project Management For Complex Transportation Projects, John Owens

Graduate Theses and Dissertations

The management of complex transportation projects requires a fundamental change in how they are approached. The traditional methodology for managing transportation projects is not adequate for complex projects. The project begins by discussing the transition of project management towards a five-dimensional model that incorporates context and financing dimensions that have previously been regarded merely as risks. The five dimensional model and an extensive literature search pertaining to the management of complex transportation projects assist in mapping the complexity of real-world projects. The main purpose of this research is to present results found on real-world projects that illustrate a new type ...


Effects Of Grid Resolution In A Three-Dimensional Hydrostatic Model: Modeling Field Observations, Joshua Scanlon 2010 Iowa State University

Effects Of Grid Resolution In A Three-Dimensional Hydrostatic Model: Modeling Field Observations, Joshua Scanlon

Graduate Theses and Dissertations

Basin-scale internal waves drive the energy flux path in a stratified lake. Therefore, accurate modeling of lake response under environmental forcing is important when considering mixing and the transport of dissolved substances. The Estuary, Lake, and Coastal Ocean Model was used to determine the grid resolution required to model field observations from Ada Hayden Lake and West Okoboji Lake. The use of the hydrostatic assumption in modeling wind-forced motions across a wide frequency spectrum accurately reproduced field observations, supporting the use of the hydrostatic assumption. Model results were compared to field data using dimensionless variables for potential and kinetic energy ...


Evaluation Of Mechanistic-Based Compaction Measurements For Earthwork Qc/Qa, Jiake Zhang 2010 Iowa State University

Evaluation Of Mechanistic-Based Compaction Measurements For Earthwork Qc/Qa, Jiake Zhang

Graduate Theses and Dissertations

Compaction control for subgrade and base materials used in highway construction is typically based on field tests in comparison to laboratory Proctor tests that determine the relationship between dry unit weight and moisture content. The "optimum" moisture content and maximum dry unit weight are established and then a minimum relative compaction value and moisture content range is specified for acceptance during construction. This approach, although widely accepted, does not directly determine the mechanistic properties of the compacted material (i.e., strength or stiffness). The premise for adopting QA/QC tests that determine mechanistic properties is that the QA/QC operations ...


Estimation Of The Water Balance Using Observed Soil Water In The Nebraska Sandhills, Venkataramana Sridhar, K. G. Hubbard 2010 Boise State University

Estimation Of The Water Balance Using Observed Soil Water In The Nebraska Sandhills, Venkataramana Sridhar, K. G. Hubbard

Civil Engineering Faculty Publications and Presentations

Analyzing the dynamic hydrologic conditions of the Sandhills is critical for water and range management, sustainability of the Sandhills ecosystem as well as for dune stability. There are complex models available to quantify both surface and subsurface hydrological processes. However, we present in this study an application of a relatively simple model to arrive at best estimates of the water balance components. Using the Thornthwaite-Mather (TM) model, water balance components were estimated for 4 Automated Weather Data Network (AWDN) weather monitoring stations. Estimated averages of the water balance components suggested that mean annual precipitation of these four sites was only ...


Development Of An Improved Agricultural-Based Deicing Product, Peter Talor, Kasthurirangan Gopalakrishnan, John G. Verkade, Kuldeep Wadhwa, Sunghwan Kim 2010 Iowa State University

Development Of An Improved Agricultural-Based Deicing Product, Peter Talor, Kasthurirangan Gopalakrishnan, John G. Verkade, Kuldeep Wadhwa, Sunghwan Kim

InTrans Project Reports

Snow and ice removal on public streets is a critical part of the work of departments of transportation in northern U.S. states, including Iowa. Iowa is also a state rich in agricultural resources, some of which undergo industrial processes that generate a number of byproducts, e.g., in converting corn to ethanol or soy to biodiesel. It would be desirable to find those that, with a minimum of additional processing, can be used as a deicing compound, either alone or in combination with products currently in use. The focus of this work is therefore to investigate by-products from agricultural ...


Automated Pavement Condition Data Collection Quality Control, Quality Assurance, And Reliability, Ghim Ping (Raymond) Ong, Samy Noureldin, Kumares C. Sinha 2010 Purdue University

Automated Pavement Condition Data Collection Quality Control, Quality Assurance, And Reliability, Ghim Ping (Raymond) Ong, Samy Noureldin, Kumares C. Sinha

JTRP Technical Reports

In recent years, state highway agencies have come to understand the need for high quality pavement condition data at both the project and network levels. At the same time, agencies also realize that they have become too dependent on contractors to ensure the quality of the delivered data without any means to independently assure the quality of these delivered data. This research study therefore aims to investigate the inherent variability of the automated data collection processes and proposes guidelines for an automated data collection quality management program in Indiana. In particular, pavement roughness data (in terms of IRI) and pavement ...


Treatment Guidelines For Pavement Preservation, Jusang Lee, Todd Shields 2010 Indiana Department of Transportation

Treatment Guidelines For Pavement Preservation, Jusang Lee, Todd Shields

JTRP Technical Reports

This project presents pavement treatment practice guidelines and a distress identification manual for the purpose of improving the INDOT pavement preservation practices. The treatment guidelines consist of 10 treatment types for asphalt pavements and composite pavements and 8 treatment types for Portland cement concrete pavement (PCCP). The treatment guidelines include treatment descriptions, benefits, applicable pavement conditions, treatment materials, and treatment procedures. The guidelines are based on information obtained mainly from the INDOT Standard Specification, the INDOT Design Manual, and the INDOT Field Operations Handbook for Crew Leaders. The treatments are covered in the guidelines. The distress identification manual presents the ...


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