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Construction Engineering and Management Commons™
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Articles 1 - 23 of 23
Full-Text Articles in Construction Engineering and Management
Effects Of Warm-Mix Asphalt Additives On Asphalt Mixture Characteristics And Pavement Performance, Jun Zhang
Effects Of Warm-Mix Asphalt Additives On Asphalt Mixture Characteristics And Pavement Performance, Jun Zhang
Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research
The primary objective of this research is to evaluate the feasibility of several WMA mixtures as potential asphalt paving mixtures for Nebraska pavements. To that end, three well-known WMA additives (i.e., Sasobit, Evotherm, and Advera synthetic zeolite) were evaluated. For a more realistic evaluation of the WMA approaches, trial pavement sections of the WMA mixtures and their HMA counterparts were implemented in Antelope County, Nebraska. More than one ton of field-mixed loose mixtures were collected at the time of paving and were transported to the NDOR and UNL laboratories to conduct comprehensive laboratory evaluations and pavement performance predictions of the …
Frameworks For Systemic And Structural Analysis Of Financial Innovations In Infrastructure, Ali Mostafavi, Dulcy M. Abraham
Frameworks For Systemic And Structural Analysis Of Financial Innovations In Infrastructure, Ali Mostafavi, Dulcy M. Abraham
Infrastructure System-of-Systems (I-SoS ) Research Group
Financial innovations have emerged globally to close the gap between the rising global demand for infrastructures and the availability of financing sources offered by traditional financing mechanisms such as fuel taxation, tax-exempt bonds, and federal and state funds. The key to sustainable innovative financing mechanisms is effective policymaking. This paper discusses the theoretical framework of a research study whose objective is to structurally and systemically assess financial innovations in global infrastructures. The research aims to create analysis frameworks, taxonomies and constructs, and simulation models pertaining to the dynamics of the innovation process to be used in policy analysis. Structural assessment …
Diseño De Vigas Altas Con Modelos A Escala En Micro Concreto Reforzado, Usando La Metodología Tradicional Frente A La Del Strut And Tie Model, Jhonny Alejandro Valencia Camacho
Diseño De Vigas Altas Con Modelos A Escala En Micro Concreto Reforzado, Usando La Metodología Tradicional Frente A La Del Strut And Tie Model, Jhonny Alejandro Valencia Camacho
Ingeniería Civil
Este trabajo comprende una investigación a nivel experimental sobre elementos estructurales llamados vigas altas, que por medio de modelos a escala en micro concreto reforzado permitirá estudiar su comportamiento bajo 2 cargas puntuales aplicadas a los tercios de la luz, variando el porcentaje de la cuantía al momento de considerar el refuerzo horizontal y vertical del cortante en un Ln/d de 2,0 aproximadamente, con un previo diseño el cual es realizado con la metodología tradicional (ACI, NSR 98), además de una metodología alterna llamada Strut And Tie Model. En los últimos años se ha continuado la investigación en vigas altas, …
Culvert Material Cost Comparison, New England Environmental Finance Center
Culvert Material Cost Comparison, New England Environmental Finance Center
Economics and Finance
The following tables provide a detailed look at the role that culvert material and culvert diameter play in the overall cost of a culvert replacement project. Table 1 displays the cost per foot purchase price arranged by diameter size for the various culvert materials that are currently available. Table 2 displays the average additional culvert pipe material cost (increased cost to upsize minus original in-kind replacement cost) that would be incurred when upsizing a given diameter of culvert with a 50 foot length by factors of: 200%, 250% and 300%.
Self-Organizing Inputs For Adaptive Neurocontrol Of Large-Scale Systems, Simon Laflamme, Jerome J. Connor
Self-Organizing Inputs For Adaptive Neurocontrol Of Large-Scale Systems, Simon Laflamme, Jerome J. Connor
Simon Laflamme
Black-box modeling for system identification and control can be constrained by the geometric scale of a plant. Those constrains arise from a technical or economical issue in obtaining input-output data sets for training purposes. A solution is sequential adaptation, which must be achieved in real time in the case of control systems, because a prescribed level of performance is required while external excitations are occurring. A major challenge is the proper selection of inputs that would lead to a quick and optimal adaptation. This paper proposes a new method for selection of inputs in black-box modeling. The method, termed the …
Sostenibilidad Y Creación De Valor A Través De Un Sistema De Control De Gestión Sigpro En La Empresa Constructora Cesar Briceño Salas Proyecto Cemae, Monica Eneria Olaya Angel
Sostenibilidad Y Creación De Valor A Través De Un Sistema De Control De Gestión Sigpro En La Empresa Constructora Cesar Briceño Salas Proyecto Cemae, Monica Eneria Olaya Angel
Ingeniería Civil
No abstract provided.
Improving Surveying Accuracy And Efficiency In Connecticut: An Accuracy Assessment Of Geoid03 And Geoid09, Thomas H. Meyer, Robert Baron
Improving Surveying Accuracy And Efficiency In Connecticut: An Accuracy Assessment Of Geoid03 And Geoid09, Thomas H. Meyer, Robert Baron
Department of Natural Resources and the Environment Articles
Comparing published NAVD 88 Helmert orthometric heights of First-Order bench marks against GPS-determined orthometric heights showed that GEOID03 and GEOID09 perform at their reported accuracy in Connecticut. GPS-determined orthometric heights were determined by subtracting geoid undulations from ellipsoid heights obtained from a network least-squares adjustment of GPS occupations in 2007 and 2008. A total of 73 markers were occupied in these stability classes: 25 class A, 11 class B, 12 class C, 2 class D bench marks, and 23 temporary marks with transferred elevations. Adjusted ellipsoid heights were compared against OPUS as a check. We found that: the GPS-determined orthometric …
A Life Cycle Cost Analysis Of Large-Scale Thermal Energy Storage Technologies For Buildings Using Combined Heat And Power, Kenneth Gaine, Aidan Duffy
A Life Cycle Cost Analysis Of Large-Scale Thermal Energy Storage Technologies For Buildings Using Combined Heat And Power, Kenneth Gaine, Aidan Duffy
Conference Papers
Buildings account for approximately 40% of energy consumption and greenhouse gas (GHG) emissions in developed economies, of which approximately 55% of building energy is used for heating and cooling. The reduction of building-related GHG emissions is a high international policy priority. For this reason and because there are many technical solutions for this, these polices should involve significant improvements in the uptake of small-scale energy efficient (EE) systems. However the widespread deployment of many technologies, must overcome a number of barriers, one of which is a temporal (diurnal or seasonal) mismatch between supply and demand. Costeffective thermal storage solutions have …
01june2010_Building Collapse_Begunbari, Md. Nurul Alam
01june2010_Building Collapse_Begunbari, Md. Nurul Alam
Md. Nurul Alam
No abstract provided.
Evaluating The Appropriateness Of Project Delivery Systems For Different Trenchless Methods, Ali Mostafavi, Tom Iseley, Dulcy Abraham
Evaluating The Appropriateness Of Project Delivery Systems For Different Trenchless Methods, Ali Mostafavi, Tom Iseley, Dulcy Abraham
Infrastructure System-of-Systems (I-SoS ) Research Group
Trenchless methods have been considered to be a viable solution for pipeline projects in urban areas. Their applicability in pipeline projects is expected to increase with the rapid advancements in technology and emerging concerns regarding social costs related to trenching methods. Selecting appropriate project delivery system (PDS) is a key to the success of trenchless projects. To ensure success of the project, the selected project delivery should be tailored to trenchless project specific characteristics and owner needs, since the effectiveness of project delivery systems differs based on different project characteristics and owners requirements. Since different trenchless methods have specific characteristics …
Performance Of Nevada’S Aggregates In Alkali-Aggregate Reactivity Of Portland Cement Concrete, Mohammad Shahidul Islam
Performance Of Nevada’S Aggregates In Alkali-Aggregate Reactivity Of Portland Cement Concrete, Mohammad Shahidul Islam
UNLV Theses, Dissertations, Professional Papers, and Capstones
Alkali-aggregate reaction (AAR) is a form of distress that occurs in concrete and results in serviceability problems, cracks, spalling, and other deterioration mechanisms. There are two categories of AAR, namely, alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR). Alkali-silica reaction is one of the most recognized deleterious phenomena in concrete, and has been a major concern since its discovery in the 1940s. The reaction which occurs between reactive silica or silicates present in some aggregates and alkalis of Portland cement produces an alkali-silica gel that expands in the presence of moisture resulting in concrete cracks. ACR is also a chemical reaction …
Performance Of A Stormwater Filter And Bacteria Inactivation Using Biocidal Media, Alexander Scott Bowerman
Performance Of A Stormwater Filter And Bacteria Inactivation Using Biocidal Media, Alexander Scott Bowerman
Master's Theses
There are many possible ways to mitigate stormwater pollution, but this study focused on the DrainPacTM catchment basin insert and the feasibility of integrating N-halamine biocidal brominated beads into the filter system. This study was divided into three sections. The first section involved testing a DrainPacTM filter for treatable flow rates, head loss, and removal of solids, oil, and bacteria. The DrainPacTM filter is designed to be installed in a stormwater catch basin. The filter is composed of a 12 x 41 inch metal frame with textile filter media attached to it in a basket shape. The upper portion of …
Effects Of Damping Device Nonlinearity On The Performance Of Semiactive Tuned Mass Dampers, C Lindh, Simon Laflamme, Jerome J. Connor
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
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 …
Fieldmanager® – Construction Management Software, Purdue Ect Team
Fieldmanager® – Construction Management Software, Purdue Ect Team
ECT Fact Sheets
The FieldManager® software is a construction management system jointly owned by the Michigan Department of Transportation (MDOT) and Info Tech, Inc. Designed for any size organization that manages construction projects, FieldManager software wraps up contract documentation and reporting, contract modifications, and pay estimates into one neat package for use on multiple hardware platforms, increasing productivity and accountability by implementing a standard business practice across the organization.
Appia® – Construction Management Web Application, Purdue Ect Team
Appia® – Construction Management Web Application, Purdue Ect Team
ECT Fact Sheets
The Appia® software is a hosted web application for construction program administration. The Appia system can manage the business processes in the major functional areas of the project life-cycle – estimation, bid management and construction – due to its flexible configuration and customizable business rules, providing organizations the opportunity to simplify and standardize their processes.
Automated Tank Surface Finishing System, Purdue Ect Team
Automated Tank Surface Finishing System, Purdue Ect Team
ECT Fact Sheets
The current finishing techniques are costly and laborious, and they expose workers to significant health and safety risks. The automated tank surface finishing system uses a computer-controlled motion module to refinish the vertical exterior walls of a tank. The module is configurable for both blasting and painting and utilizes conventional surface finishing equipment for these processes. An overspray hood is included to reduce contamination of the surrounding environment during painting. The module attaches to a tank’s wind girts with steel cables, and its position and velocity are controlled by servo-driven hoists.