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Articles 1 - 30 of 38
Full-Text Articles in Construction Engineering and Management
Cost Of Quality In The Construction Industry, Philip L. Barlow
Cost Of Quality In The Construction Industry, Philip L. Barlow
Construction Management
The construction industry needs to decrease its costs due to nonconformance by implementing an objective model for analyzing the excessive cost of poor quality and the overall savings realized from good quality. Direct cost estimates from rework in commercial building construction average about 5%. A simple calculation based on U.S. construction industry expenditures of $1.246 trillion in 2007 reveals that $62 billion is wasted just on the direct cost construction rework alone! The term quality can be applied in many different ways to various aspects of the construction process. This paper proposes a model which helps illustrate how the various …
A Study Of Electricians' Preferences Of Pvc And Alternative Conduit Materials In The State Of Utah, Robert Andrus
A Study Of Electricians' Preferences Of Pvc And Alternative Conduit Materials In The State Of Utah, Robert Andrus
Theses and Dissertations
Polyvinyl Chloride, commonly known as PVC is a common and effective construction material. PVC is also one of the most common types of plastic. In 2008, global production and consumption of PVC was approximately 34.5 million tons. The construction industry is responsible for about 70% of the world's consumption of PVC. The largest construction use of PVC is for pipe and conduit. Modern construction, especially structures built for data services depend heavily upon PVC conduit for underground pathways to distribute electricity and data. PVC is also at the center of a fierce effort by environmental groups who would like to …
An Improved Cube Cell Assembly For The Use With High Pressure/High Temperature Cubic Apparatus In Manufacturing Polycrystalline Diamond Compact Inserts, Kevin Christian Bach
An Improved Cube Cell Assembly For The Use With High Pressure/High Temperature Cubic Apparatus In Manufacturing Polycrystalline Diamond Compact Inserts, Kevin Christian Bach
Theses and Dissertations
The goal for this research was to reduce the current manufacturing cost of the polycrystalline diamond compact (PDC) inserts utilized in the natural gas and oil drilling industry while not reducing their current performance. Polycrystalline Diamond is added to the tungsten-carbide (WC) substrates commonly utilized in these applications because of its greater wear and thermal resistance. With the current cube cell design for the high-pressure/high-temperature apparatus, it is necessary to bond an extra WC substrate to the polycrystalline diamond insert to achieve the sizes generally ordered by the customers. The problem of bonding the extra WC substrate was solved by …
Variability In Construction Of Cement-Treated Base Layers: Probabilistic Analysis Of Pavement Life Using Mechanistic-Empirical Approach, Tyler J. Rogers
Variability In Construction Of Cement-Treated Base Layers: Probabilistic Analysis Of Pavement Life Using Mechanistic-Empirical Approach, Tyler J. Rogers
Theses and Dissertations
The primary objective of this research was to quantify the improvement in service life of a flexible pavement constructed using full-depth reclamation (FDR) in conjunction with cement stabilization when specified reductions in the spatial variability of specific construction-related parameters are achieved. This study analyzed pavement data obtained through field and laboratory testing of a reconstruction project in northern Utah. Data analyses included multivariate regression, Monte Carlo simulation, and mechanistic-empirical analyses of a model pavement structure. The results of the research show a steadily increasing trend in 28-day unconfined compressive strength of the cement-treated base (CTB) layer with increasing reductions in …
Optimization Of Two-Way Post-Tensioned Concrete Floor Systems, Gaelyn B. Krauser
Optimization Of Two-Way Post-Tensioned Concrete Floor Systems, Gaelyn B. Krauser
Master's Theses
This thesis investigates a parametric study of a flat plate floor system designed using post-tensioning. The load balanced by the post-tensioning, the slab depth, and the strength of concrete were varied to create the parametric study of a hotel/condominium grid layout. In order to perform the parametric study, research was conducted on the development of post-tensioning, methods of analysis for two-way slab design, and post-tensioning methods of analysis. Design was conducted by hand through a series of Excel spreadsheets and compared to results found using the computer analysis program, ADAPT-PT. The designs found in the parametric study were then used …
Thermal Testing Of Innovative Building Insulations, Eoghan Frawley
Thermal Testing Of Innovative Building Insulations, Eoghan Frawley
Masters
The main objective of this research was to design and develop a Hot Box to test the thermal properties of Eco-quilt multi-foil insulation. This work began by gaining an understanding into how multi-foil works, how it is installed and examining different variations of this insulation. It was clear at an early stage that there were two conflicting opinions on the thermal performance of multi-foils. One set of tests claimed that the insulation had a thermal resistance of approximately 5 m2oC/W. These tests were carried out in real weather conditions, where temperatures were fluctuating, although one laboratory test achieved similar results. …
Beyond Sustainability: The Contractor’S Role In Regenerative System Design, Rebecca Mirsky, Anthony Songer
Beyond Sustainability: The Contractor’S Role In Regenerative System Design, Rebecca Mirsky, Anthony Songer
Construction Management Faculty Publications and Presentations
Current business models employ the concept of the triple bottom line to integrate three aspects of sustainability into the organizational process: economic growth, environmental protection and social equity. This concept is evolving toward a regenerative design approach that promotes a triple "top" line, moving accountability to the beginning of the design process by assigning value to a variety of economic, environmental and social factors. There is an increasingly important need for proactive participation from the construction community in this new generation of sustainability efforts. Otherwise, there will be a widening gap between design and construction, in which the contractor role …
Assessment Of The Embodied Co2eq In Buildings Towards A Sustainable Building Design And Construction, Adolf Acquaye, Aidan Duffy, Biswajit Basu
Assessment Of The Embodied Co2eq In Buildings Towards A Sustainable Building Design And Construction, Adolf Acquaye, Aidan Duffy, Biswajit Basu
Conference Papers
Research studies have shown that the initial energy embodied in a building can be as much as 67% of the operational energy over a 25 year period. With growing global concerns over material and resource consumption and the emissions of CO2 into the atmosphere, the energy embodied in buildings constructed in town and cities becomes important and one of the key issues that needs to be tackled in the design stages in order to strive towards sustainable buildings design. In this paper, a hybrid embodied carbon dioxide equivalent (CO2eq) methodology used to assess the CO2eq embodied in buildings is presented. …
Hot Mix Asphalt Longitudinal Joint Evaluation, Annette Porter
Hot Mix Asphalt Longitudinal Joint Evaluation, Annette Porter
Civil Engineering Undergraduate Honors Theses
Longitudinal joints are the portion of the road where two lanes meet and are formed because the lanes are paved at different times. Longitudinal joints tend to be the weakest portion of the roadway, and yet few regulations exist to control their quality. Currently, Arkansas specifications for asphalt pavement do not include any requirements for the measurement of joint quality. The purpose of this research project is to determine the most effective method for evaluating longitudinal joints in hot-mix asphalt (HMA) pavements. Most of the literature concerning longitudinal joints focuses on density as the determining factor of quality because density …
Housing Market Outlook: San Luis Obispo, Ca And Surrounding Area, Gabe Randall, Scott D. Kelting
Housing Market Outlook: San Luis Obispo, Ca And Surrounding Area, Gabe Randall, Scott D. Kelting
Construction Management
Starting between 1999 and 2000, national home prices began a period of unprecedented growth, increasing at a pace more than 8 times their annual average until peaking in early 2006. National home prices appreciated over 100% on average during the 6 year period before declining 27% from 2006 through Q4 2008. Markets across the sunbelt, namely Florida, Southern California, and Arizona saw prices appreciate as much as 180 % from 2000 to their peak in 2006; these areas have also declined the fastest and hardest, falling as much as 50% and boasting the highest foreclosure rates in the country.
Case Study In Implementing A Service-Learning Class In A Construction Management Curriculum, Philip L. Barlow
Case Study In Implementing A Service-Learning Class In A Construction Management Curriculum, Philip L. Barlow
Construction Management
Service-learning is a pedagogical approach which gives the students an opportunity to develop professional and social skills in concert with learning and reflecting on curricular material. This is achieved through a student’s active participation in a meaningful community service project, open and interactive reflection, formal class lectures, and discussions. This case study discusses the results of implementing a pilot service-learning undergraduate class in a state university construction management program. The course was offered as a two-credit hour voluntary technical elective in the Spring quarter of 2008. The organization of this study first puts service-learning into context by giving a brief …
An Economic Analysis Of Military Family Housing: Should The Government Continue To Privatize?, Chad A. Woods
An Economic Analysis Of Military Family Housing: Should The Government Continue To Privatize?, Chad A. Woods
Theses and Dissertations
Providing military family housing has always been a difficult task for the United States government. To solve the latest housing short fall, the government signed the Military Housing Privatization Initiative (MHPI) into law in 1996. Under this program the government contracts private developers to build, own, and operate housing units. The developer then collects rent through housing allowance payments. At the time MHPI was signed into law, military members were expected to pay 15 percent of their housing costs out of pocket. Subsequent legislation has increased housing allowance to provide 100 percent of all housing costs eliminating out of pocket …
The Utilization Of Light Gauge Steel In Residential Construction On The State Of Utah, Matthew Zaugg Perkins
The Utilization Of Light Gauge Steel In Residential Construction On The State Of Utah, Matthew Zaugg Perkins
Theses and Dissertations
This thesis researched why light gauge steel framing members are not used more in single-family residential construction. A survey was designed to extract information from licensed contractors in Utah on uses of light gauge steel framing members in residential homes. The purpose of the research was to discover what Utah builder's perception was concerning light gauge steel framing. Also, the researcher tried to learn a little about the contractors to see if there was a correlation between contractors that used light gauge steel and those that did not. Names of licensed general building contractors and residential contractors and their contact …
An Analysis Of Construction Contractor Performance Evaluation System, Rebecca S. Brown
An Analysis Of Construction Contractor Performance Evaluation System, Rebecca S. Brown
Theses and Dissertations
A rigorous system for rating construction contractor performance does not exist for the USAF as identified by the Air Force Civil Engineer (USAF CE), Major General Del Eulberg (Eulberg, 2007). The United States Army Corp of Engineers (USACE) uses DD Form 2626 for contractor performance evaluation and contractor selection. The objective of this research is to strengthen the USAF contractor rating system by exploring USACE‘s use of DD Form 2626. Using data from DD Form 2626, statistical analysis was conducted to determine if the measured performance sub-items reflect their respective performance elements, whether the resulting performance elements relate to the …
A Condition Assessment Approach For Buildings, Sally Maher Naguib El-Gizawy
A Condition Assessment Approach For Buildings, Sally Maher Naguib El-Gizawy
Archived Theses and Dissertations
No abstract provided.
The Future Scenario Of Creating A Digital Sme Community In The Irish Construction Industry, Alan V. Hore, Roger West, Alan Redmond
The Future Scenario Of Creating A Digital Sme Community In The Irish Construction Industry, Alan V. Hore, Roger West, Alan Redmond
Conference papers
The problems associated with the Construction Industry not being able to manage and com-municate electronically product and project data between collaborating firms and within individual companies is compounded by the large number of small companies that have not adopted advanced Information Com-munication Technology (ICT). The typical nature of the service provided in construction, being an on-site and often highly customised service are generally identified as the reason for the low ICT uptake. The majority of Irish companies in the construction sector are Small to Medium sized Enterprises (SMEs). As eBusiness opens up the Irish economy to international competition Irish SMEs …
A Flexible Web Based Learning Tool For Construction And Surveying Students Using Building Information Modelling And Laser Scanning, Maurice Murphy, Garrett Keenaghan, Eugene Mcgovern, Sara Pavia
A Flexible Web Based Learning Tool For Construction And Surveying Students Using Building Information Modelling And Laser Scanning, Maurice Murphy, Garrett Keenaghan, Eugene Mcgovern, Sara Pavia
Conference papers
Teaching and training construction and surveying students using computer simulations of buildings although recently developed is not new. In the case of this project a novel aspect is introduced through applying advanced recording and building modelling techniques developed in the Faculty of the Built Environment in the Technological University of Dublin. In summary this learning software uses parametric objects representing intelligent building components which are brought together virtually by the student to create or form an entire building. The library of parametric objects contain the real world geometry, texture and specification of building parts allowing the student to virtually analyse …
Effects Of Physical And Mental Tasks On Heart Rate Variability, Satya Anasuya Paritala
Effects Of Physical And Mental Tasks On Heart Rate Variability, Satya Anasuya Paritala
LSU Master's Theses
Demands at work are associated with an increased risk of cardio vascular diseases, but little is known about its underlying connection. The purpose of this study was to evaluate the effects of physical and mental tasks that induced stress, on Heart Rate Variability (HRV). Another aim was to observe the trends in subjective workload ratings in conjunction with the physiological response of the heart and also to assess the comfort level of the participants while wearing the heart rate monitor and performing tasks. Heart rate was recorded while at rest and while performing the tasks. Subjective workload ratings were obtained …
Assessing The Accuracy Of Task Time Prediction Of An Emerging Human Performance Modeling Software - Cogtool, Oluwakemi Damilola Adio
Assessing The Accuracy Of Task Time Prediction Of An Emerging Human Performance Modeling Software - Cogtool, Oluwakemi Damilola Adio
LSU Master's Theses
There is a need for a human performance modeling tool which not only has the ability to accurately estimate skilled user task time for any interface design, but can be used by modelers with little or no programming knowledge and at a minimal cost. To fulfill this need, this research investigated the accuracy of task time prediction of a modeling tool – CogTool - on two versions of an interface design used extensively in the petrochemical industry – DeltaV. CogTool uses the KeyStroke Level Model (KLM) to calculate and generate time predictions based on specified operators. The data collected from …
Hearing Assessment Of Forest Loggers, Antonio A. Fonseca
Hearing Assessment Of Forest Loggers, Antonio A. Fonseca
LSU Master's Theses
Forest logging is the process in which trees are cut down for forest management and/or timber harvest. According to OSHA, logging is the most dangerous occupation in the United States. It consistently represents one of the most hazardous industries, with a fatality rate more than 21 times higher than the rate for all workers in the United States. Yet, little research has been performed to determine the long term effect of noise on forest loggers. OSHA regulations state that the maximum permissible hearing in an 8 hour shift should not exceed 90 dB. Occupational noise exposure is recognized as a …
Laser Assisted Friction Stir Welding: Finite Volume Method And Metaheuristic Optimization, Shivani Daftardar
Laser Assisted Friction Stir Welding: Finite Volume Method And Metaheuristic Optimization, Shivani Daftardar
LSU Master's Theses
Friction Stir Welding (FSW) is a solid state joining process that uses a non-consumable rotating welding tool to generate frictional heat at the welding location. Large forces are required to produce friction between the welding tool and the work piece which increases the wear rate of the welding tool in welding materials with high melting temperature. Several different approaches have been developed to address this problem. This thesis focuses on a new modification of friction stir welding, called Laser Assisted Friction Stir Welding, a process developed in the last decade. This process uses laser energy to preheat the work piece …
Neck Muscles Activity And Upper Body Extremity Angles In Dynamic Overhead Lifting, Mohamed Wassim Mokrani
Neck Muscles Activity And Upper Body Extremity Angles In Dynamic Overhead Lifting, Mohamed Wassim Mokrani
LSU Master's Theses
Injuries of the neck and shoulders are common among workers who perform overhead tasks. In order to develop an injury-free working environment with regards to occupational musculoskeletal stress, it is pivotal to understand the pathophysiology of mechanical stress on the musculoskeletal system. The objective of this research was to study the effect of overhead lifting on the sternocleidomastoid and upper Trapezius muscles. Upper body joint angles were also analyzed using APAS during the overhead lifting. This study was conducted using two devices. The set of equipment incorporates an electromyography device, and the APAS. Two electrodes were placed at the muscle …
Thermomechanical Modeling And Optimization Of Friction Stir Welding, Manthan Malde
Thermomechanical Modeling And Optimization Of Friction Stir Welding, Manthan Malde
LSU Master's Theses
This thesis research implemented an existing thermomechanical model of friction stir welding process, and studied the surrogate model-based optimization approach to obtain optimal process parameters for the modeled friction stir welding process. As an initial step, the thermomechanical model developed by Zhu and Chao for friction stir welding of 304L stainless steel was replicated using ANSYS. The developed model was then used to conduct parametric studies to understand the effect of various input parameters like total rate of heat input, welding speed and clamping location on temperature distribution and residual stress in the workpiece. With the data from the simulated …