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Articles 1981 - 2010 of 4458
Full-Text Articles in Civil and Environmental Engineering
Possible Use For Recycled Disposable Face Masks In Concrete, Lauren Douglas
Possible Use For Recycled Disposable Face Masks In Concrete, Lauren Douglas
Construction Management
Disposable face masks are one of many single use products that are detrimental to the environment. The construction industry has been introducing new ways to incorporate recycled products into their materials. This paper addresses one possible way to use more environmentally friendly materials in the construction industry. 16 concrete cylinders were prepared using 4x8 forms. The mix was manipulated to test the impact of incorporating varying levels of disposable shredded face masks. Compressive strength and workability were measured in these cylinders. Eight cylinders were prepared for the control batch. Four cylinders were prepared using 10 oz. of shredded face masks …
An Empirical Analysis Of Dod Construction Task Order Performance, Adam B. Teston, Tyler S. Stout
An Empirical Analysis Of Dod Construction Task Order Performance, Adam B. Teston, Tyler S. Stout
Theses and Dissertations
Cost and schedule overrun plague over 50 of all construction projects, engendering diminished available funding that leads to deferred maintenance and impaired award ability for needed projects. Though existing research attempts to identify overruns sources, the results are inconclusive and frequently differ. Accordingly, this research reviews DoD construction contract data from the past ten years to identify the contract attributes of 79,894 projects that correlate with superior performance for use in future project execution. This research starts with creating a database that houses the largest single source of construction contract information. The research then evaluates the data to determine if …
How New, Innovative Technology Can Be Implemented To Combat The Construction Industry Labor Shortage, Noah David Jackson
How New, Innovative Technology Can Be Implemented To Combat The Construction Industry Labor Shortage, Noah David Jackson
The Professional Constructor
This essay addresses the construction industry’s need to compensate for the current and projected labor shortage through innovative technologies. In the first portion of this essay, three technologies that are most feasible for implementation – the Internet of Things (IoT), Drones, and Prefabrication – are detailed. The challenges faced are then discussed before the second major portion in which steps for implementation are outlined. These steps include forming partnerships, learning the process, communicating, training, implementing, and adapting and improving. The essay concludes with a discussion of how the AGC organization, and members within, can aid the industry in meeting this …
The Adaptative Construction Industry, Rhett Cox
The Adaptative Construction Industry, Rhett Cox
The Professional Constructor
The construction industry is an industry that always unites to find ways to solve problems. It is very complex and requires considerable organization, hard work, specific skills, and a whole lot of determination. In this paper, I will discuss three ways that the industry is making strides to make construction better and more efficient: (a) increased use of modular construction and prefabrication, (b) use of drones, and (c) Building Information Modeling (BIM) use. With the construction process becoming more and more complex, improving efficiency and safety has gained more attraction, especially when coping with fundamental issues such as labor shortage, …
How New, Innovative Technology And Project Execution Tools And Techniques Can Be Used To Improve The Construction Process (Including Safety And Efficiency), James L. Craig
The Professional Constructor
Humanity has often sought to utilize tools and technology to make working faster, more efficient, more comfortable, and more accurate. While humans may have started with stone tools, we have since developed complex and sophisticated mechanical and digital technologies. The construction industry has been utilizing construction technology and equipment for these same reasons for generations. While other industries have embraced the use of smart, autonomous technology and robotics, the construction industry has steadily fallen behind in this effort. In this paper, I will discuss current work using these tools and possible applications for future development.
The Impact Of Climate Change On Building Energy Demands And Mitigation Measures In Florida, Aiyin (Erin) Jiang
The Impact Of Climate Change On Building Energy Demands And Mitigation Measures In Florida, Aiyin (Erin) Jiang
The Professional Constructor
Tropical and subtropical parts of the world are projected to be the most vulnerable to the impact of climate change on building energy consumption demand. Few studies, however, focus on all four greenhouse emission scenarios defined by International Panel of Climate Change, which would be useful in assessing the energy demand challenges areas such as Florida. This study applies the most recognized climate change model downscaling approach, the morphing method, to investigate the impact of climate change on the commonly used commercial buildings in Florida’s climate zones under all four emission scenarios. It also analyzes the efficacy of various mitigation …
Frequency And Magnitude Of Cost Growth In Public Works Contracts, George Fulton, Panagiotis Mitropoulos
Frequency And Magnitude Of Cost Growth In Public Works Contracts, George Fulton, Panagiotis Mitropoulos
The Professional Constructor
Cost overruns are a persistent issue in the construction industry. This paper investigates factors that may drive cost growth on public works contracts. The study collected data on 1,043 public works projects completed over a three year period. The analysis examined the impact of four factors on cost overruns: (1) Project type, (2) Contract size, (3) Contract duration, and (4) Construction placement (value per day). The data were analyzed using a combination of basic descriptive statistics along with statistical hypothesis testing of means for various factors affecting cost growth. Cost growth was found to vary significantly by project type, contract …
Case Study Of Real-World Emissions Rates Verus Epaemission Standards For Motor Graders, Boshra Karimi, Phil Lewis
Case Study Of Real-World Emissions Rates Verus Epaemission Standards For Motor Graders, Boshra Karimi, Phil Lewis
The Professional Constructor
Using the Volkswagen emissions scandal as motivation, the purpose of this case study was to investigate whether or not heavy-duty diesel construction equipment exceeds EPA emissions standards for nonroad diesel engines. The equipment analyzed included four separate motor graders with EPA emissions standards Tier 0, Tier 1, Tier 2, and Tier 3 engines. The analysis was based on a dataset of real-world emissions rates collected from in-use equipment on actual jobsites. The results showed that mass per time emissions rates for hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter decreased as the EPA emissions standards became more stringent. Furthermore, there …
Understanding Sub-Contractor Selection Factors In Thebuilding Construction Industry For The Southeastern United States, Dhaval Gajjar, Cayla Anderson
Understanding Sub-Contractor Selection Factors In Thebuilding Construction Industry For The Southeastern United States, Dhaval Gajjar, Cayla Anderson
The Professional Constructor
The primary entities within building construction industry consists of the owner, the architect / engineer, and the general contractor, that ensure the success of any construction project. On a traditional project, the owner selects and contracts with the general contractor to construct a building designed by the architect. A considerable amount of research has been conducted to understand the owner’s selection factors to hire a qualified general contractor. However, the general contractor selected for the project seldom self-performs the entire construction of a building. The general contractor might self-perform some aspects of the actual building construction, but they will typically …
Initial Assessment Of Liquefied Scrap Tire Concrete, Abdulkareem Kuaryouti, Christopher D. Eamon
Initial Assessment Of Liquefied Scrap Tire Concrete, Abdulkareem Kuaryouti, Christopher D. Eamon
Civil and Environmental Engineering Faculty Research Publications
A new approach to incorporate scrap tire material into concrete was investigated, where two reclaimed waste tire components, carbon black and fuel oil, were used to replace a portion of water. The effect of “liquid tire” content to water ratios from 5-40% on an otherwise typical concrete mix were assessed, where compressive and flexural strength, flexural toughness, modulus of elasticity, and several fresh concrete properties were determined. Results were compared to typically expected results of traditional shredded tire mixes with equivalent tire content. It was found that the liquid tire mixes experienced significantly less losses of compressive strength and workability …
Quantifying Materials Waste In The Egyptian Construction Industry: A Critical Analysis Of Rates And Factors, Ayman Ahmed Ezzat Othman, Ahmed Osama Daoud Dr., Obas John Ebohon, Ali Bayyati
Quantifying Materials Waste In The Egyptian Construction Industry: A Critical Analysis Of Rates And Factors, Ayman Ahmed Ezzat Othman, Ahmed Osama Daoud Dr., Obas John Ebohon, Ali Bayyati
Architectural Engineering
Construction and demolition waste (CDW) is a critical challenge facing the construction industry. It leads to deterioration of the triple bottom line of sustainability. Unfortunately, the CDW management research in Egypt lacks studies investigating (1) the variations in CDW generation (CDWG) among different types of construction projects, and (2) the factors affecting CDW reduction (CDWR). Based on a benchmarking approach, this research (1) quantifies CDW in terms of generation rates and costs among different construction project types in Egypt, and (2) investigates the relationship between CDWG and different adopted CDWR factors. Using structured interviews, a comparative case study was conducted …
Multi-Skilled Labor Optimization With Partial Allocation Of Resources, Amira Saleh
Multi-Skilled Labor Optimization With Partial Allocation Of Resources, Amira Saleh
Theses and Dissertations
The current practice of labor allocation in construction schedules assumes single-skilled workforce; meaning that each worker is assumed to be skilled in only one trade. In such practice, at any instance in the project lifecycle, some of the workforce become idle waiting for other labor types to complete their work. Traditionally, companies may relocate idle workers to other projects and return them back to their original project when needed again. This complicates the resource management process and is not often performed successfully, leading to schedule and cost overruns. Alternatively, project managers may keep the idle workforce at their projects because …
A Web-Based Change Control Management Toolkit For Lump-Sum Turnkey Contractors: Transformation To Third Generation, Ahmed Omran
A Web-Based Change Control Management Toolkit For Lump-Sum Turnkey Contractors: Transformation To Third Generation, Ahmed Omran
Theses and Dissertations
Project deviations and changes are one of the key common particulars encountered in the Construction industry. Project changes can occur in different forms, may impact different pillars of the project, and can be caused due to the existence of various underlying factors. Mismanaging or lack of controlling these changes is one of the key contributing factors leading to project hardships. Contractors incur profit erosion, scope creep, and time slippages mainly by failing to have an effective project change management system enforced within its project execution philosophy. Such adversity is amplified for contractors engaging in lump-sum turnkey “LSTK” projects. Contractors encounter …
Wearable Sensing Devices: Towards The Development Of A Personalized System For Construction Safety And Health Risk Mitigation, Chukwuma Nnaji, Ibukun Awolusi, Jeewoong Park, Alex Albert
Wearable Sensing Devices: Towards The Development Of A Personalized System For Construction Safety And Health Risk Mitigation, Chukwuma Nnaji, Ibukun Awolusi, Jeewoong Park, Alex Albert
Civil and Environmental Engineering and Construction Faculty Research
Wearable sensing devices (WSDs) are increasingly helping workers stay safe and healthy in several industries. However, workers, especially in the construction industry, have shown some aversion towards the use of WSDs due to their ability to capture specific information that may be considered personal and private. However, this revered information may provide some critical insight needed by management to plan and optimize worksite safety and support technology adoption in decision making. Therefore, there is a need to develop personalized WSD systems that are mutually beneficial to workers and management to ensure successful WSD integration. The present study aims to contribute …
Using System Dynamics To Study The Effect Of Change Orders On Labor Productivity, Shrouk Gharib
Using System Dynamics To Study The Effect Of Change Orders On Labor Productivity, Shrouk Gharib
Theses and Dissertations
Change orders in construction projects lead to numerous negative impacts, including loss of labor productivity, delays, and cost overruns. Owners and contractors are usually in disagreement when it comes to allocating the extent of responsibilities with respect to the resulting overruns. Each party tries to hold the other party fully responsible for such overruns through a series of claims and disputes. Several delay analysis techniques have been developed to aid in settling such disputes, however, they do not fully grasp the rippled impacts of change orders and do not assist parties in reaching consensus when it comes to finding the …
A Critical Analysis Of The Application Of Augmented Reality (Ar) For Monitoring And Documentation Of Construction Site Progress In The Irish Aec Industry., Bim Tudublin, Lukasz Sarnot
A Critical Analysis Of The Application Of Augmented Reality (Ar) For Monitoring And Documentation Of Construction Site Progress In The Irish Aec Industry., Bim Tudublin, Lukasz Sarnot
Capstone Reports
Sarnot, L. (2021) A critical analysis of the application of augmented reality (AR) for monitoring and documentation of construction site progress in the Irish AEC industry, Capstone Project from the MSc in aBIMM
An Examination Of The Use Of Geotechnical Bim To Provide Value Engineering Solutions For Coastal Infrastructure., Bim Tudublin, Eric Brennan
An Examination Of The Use Of Geotechnical Bim To Provide Value Engineering Solutions For Coastal Infrastructure., Bim Tudublin, Eric Brennan
Capstone Reports
The digitisation of construction is taking root as Building Information Modelling is becoming more prevalent across the industry. From an Irish context, the adoption rate of BIM has been slow; nationally its advantages and merits have been welcomed and the appropriate government support is either available, soon to be implemented or in the early conceptual stage. Within the Irish governments Project Ireland 2040 framework there are significant infrastructure developments looming ahead, in particular regarding ports and harbours. The importance of this type of infrastructure is only further compounded due to the UK’s departure from the EU and the need for …
To What Extent Can Innovative International Project Delivery Strategies (Which Leverage Bim) Improve The Cost Certainty Of Large Complex Public Procurement Projects In The Context Of Irish Public Procurement?, Bim Tudublin, Roqaya Abouklaib
To What Extent Can Innovative International Project Delivery Strategies (Which Leverage Bim) Improve The Cost Certainty Of Large Complex Public Procurement Projects In The Context Of Irish Public Procurement?, Bim Tudublin, Roqaya Abouklaib
Capstone Reports
Cost overrun is one of the biggest issues in the construction sector, and cost certainty is one of the main aims of the public construction sector in Ireland. Studies have shown that multi-disciplinary collaboration will benefit a construction project throughout its lifecycle. BIM, Lean, and IPD are independent methodologies that encourage collaborative work, and there are existent effective synergies among these concepts. The synergetic innovative international strategies were utilised for delivering large complex projects successfully globally, and many authors have studied large complex public projects that have adopted innovative international project delivery strategies collaboratively and have shown that the cost …
Opportunities In The Irish Reinforced Concrete Industry For Lean And Bim Adoption, Bim Tudublin, Kieran Mcconnell
Opportunities In The Irish Reinforced Concrete Industry For Lean And Bim Adoption, Bim Tudublin, Kieran Mcconnell
Capstone Reports
The Irish Reinforced Concrete (RC) sector has yet to realise the full potential of Building Information Modelling (BIM) and Lean construction. The positive impacts and benefits of both BIM and Lean in the wider Architecture, Engineering and Construction sector are widely recognised; many of these are transferable to the RC sector, but there is limited research and knowledge on practical transference, uses and advantages. This research aims to fill some of the existing knowledge gaps by examining BIM and Lean adoption and awareness in the Irish RC sector across sub-sectors, professions, and organisational levels, and by exploring opportunities for increasing …
A Critical Examination Of Visual Programming And Generative Design For The Compliance Checking Of Open Plan Office Layouts Against Hse Guidelines Post Covid-19., Bim Tudublin, Ronan Byrne
A Critical Examination Of Visual Programming And Generative Design For The Compliance Checking Of Open Plan Office Layouts Against Hse Guidelines Post Covid-19., Bim Tudublin, Ronan Byrne
Capstone Reports
The purpose of this study is to explore the feasibility of Visual Programming (VP) and Generative Design (GD) in assisting employers review open plan office layouts against Ireland’s HSE guidelines implemented in May 2020 in response to Covid-19. The pandemic has affected all areas of life with workplace standards requiring a complete overhaul. This study will attempt to ascertain compliance with natural ventilation and social distancing requirements through the completion of an experimental research study, utilising Computational Design (CD) tools. A GD study will be undertaken to provide the designer with numerous office layout design solutions to evaluate and evolve. …
To What Extent Can Lean Construction Processes And Principles Be Utilised In The Design Stage Of A Bim Project In The Irish Design And Construction Industry, Bim Tudublin, Barry Sheramn
To What Extent Can Lean Construction Processes And Principles Be Utilised In The Design Stage Of A Bim Project In The Irish Design And Construction Industry, Bim Tudublin, Barry Sheramn
Capstone Reports
Although different in many ways, Building Information Modelling (BIM) and Lean Construction are two processes that are having a significant impact on the Design & Construction Industry. In recent years, the Irish AECO industry has seen a tenfold increase across numerous construction disciplines with the adoption of new workflows and processes centred around both BIM and Lean methodologies. Existing literature identifies a strong synergistic relationship between the two processes and highlights the opportunity for Lean processes and principles to be implemented into the design stage workflow. This paper investigated existing literature relating to several lean processes currently implemented in the …
Should Acoustic Simulation Technology Be Utilised In Architectural Practice? Does It Have The Potential For Bim Integration?, Bim Tudublin, Keith Harvey
Should Acoustic Simulation Technology Be Utilised In Architectural Practice? Does It Have The Potential For Bim Integration?, Bim Tudublin, Keith Harvey
Capstone Reports
The research presented in this paper, firstly, aims to convey the importance of our acoustic environment through focusing on the effects of undesirable acoustic conditions on cognitive abilities in spaces where cognitive performance is of the utmost concern, our learning environments. Secondly, it aims to investigate current state-of-the-art acoustic simulation methods, available platforms, and their levels of interoperability with architectural BIM authoring software. Structured interviews were carried out with 7 Irish architects and architectural technologists to determine if a disconnection between architectural design and acoustic performance exists and to identify the advantages and disadvantages of current workflows for acoustic performance …
Hydraulic Balsa Wood Rising Bridge, Kaitlyn Greenfield
Hydraulic Balsa Wood Rising Bridge, Kaitlyn Greenfield
All Undergraduate Projects
What is the solution to allowing tall vessels to navigate past a vehicle bridge that is less than 10 [ft] above the water? To answer this question, a balsa wood bridge was designed, constructed, and tested. The bridge needed to articulate by mechanical means, allow for travel through the bridge, and be able to withstand ample force while the main structure only being constructed of balsa wood and glue. The project was analyzed in sections. These sections include: the bridge structure and its members, the hydraulic lift, and the pins needed for the bridge and hydraulic lift to operate. The …
Residential Dwelling Design And Construction Planning, Jodi Beery
Residential Dwelling Design And Construction Planning, Jodi Beery
Williams Honors College, Honors Research Projects
This report presents a step-by-step guide in building a hypothetical residential dwelling in Wayne County, Ohio. The project begins with the initial site investigation phase, which gathers general information about the physical site of proposed construction as well as the requirements of the governing body of the area; applications for permits and inspections for example. Next, phase is the site design which includes creating plans for the building footprint, pavement areas, and utility locations. The next phase in the design will be the building plans which will include floor plans and associated material lists for the construction of the home. …
Smart And Emerging Technologies: Shaping The Future Of The Industry And Offsite Construction, Rayan H. Assaad, Islam H. El-Adaway, Makarand Hastak, Kim La Scola Needy
Smart And Emerging Technologies: Shaping The Future Of The Industry And Offsite Construction, Rayan H. Assaad, Islam H. El-Adaway, Makarand Hastak, Kim La Scola Needy
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The interest in smart, emerging technologies and offsite construction methods continues to grow. While previous studies investigated different offsite construction aspects, there is still lack of research work that explored the current and future use of smart and emerging technologies, especially those used in offsite construction. This study addresses this knowledge gap through a multi-step research methodology. First, a list of 24 technologies was identified. Second, a survey was distributed to study the current use and the experts' future perceptions of the identified technologies in offsite construction. Third, descriptive statistics and computational clustering analysis were used to quantify and classify …
A Simulation Model For Optimal Bidding Decisions, Rayan H. Assaad, Muaz O. Ahmed, Islam H. El-Adaway, Amr Elsayegh
A Simulation Model For Optimal Bidding Decisions, Rayan H. Assaad, Muaz O. Ahmed, Islam H. El-Adaway, Amr Elsayegh
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The lowest bid approach is the most used technique in the US construction procurement environment since competitive bidding is a legal requirement in the public sector. Despite that many research studies were directed to help contractors in taking different bidding decisions, there is still insufficient research efforts that equipped contractors with decision-support tools to decide on optimal bid values. Hence, this paper takes previous research works a step further by developing a simulation model that can be adopted to determine the bid decision that would result in winning more projects. To this end, a methodology composed of multiple steps was …
Chaos Game Optimization Method For Weight Minimization Of Steel Truss Structure, Eain Kyi Thar
Chaos Game Optimization Method For Weight Minimization Of Steel Truss Structure, Eain Kyi Thar
Chulalongkorn University Theses and Dissertations (Chula ETD)
The research proposes the so-called chaos game optimization (CGO) method to perform the optimal sizing design of steel truss structures under applied loading regimes. The optimization problem aims at the minimization of the total weight (directly related to the cost function) of the designed structure subjected to the constraints describing the intrinsic structural responses complying with limit-state specifications. The CGO approach is based on the underlying chaos theory that establishes the primary patterns as fractals in responses to the systems representing them as self-organized dynamical systems. The fractal is generated as an initial Sierpinski triangle (i.e., search space of solution …
Dynamic Pricing In Electric Power Markets Affected By Distributed Energy Generation Using Agent-Based Modeling, Gasser G. Ali, Islam H. El-Adaway
Dynamic Pricing In Electric Power Markets Affected By Distributed Energy Generation Using Agent-Based Modeling, Gasser G. Ali, Islam H. El-Adaway
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The power infrastructure in the US is facing many challenges concerning capacity, reliability, and sustainability. Some of those challenges are associated with the integration of distributed energy resources (DER) into the conventional grid system. DER may offer reliable and cost-effective distributed small-scale generation near or at end-consumers. However, it also creates new challenges for utilities and generating companies due to the uncertainties in estimating demands. Accordingly, the goal of this research is to investigate dynamic pricing in electric power markets considering the effect of the increasing penetration of DER. To achieve that goal, a complex system-of-systems model that combines agent-based …
Bim-Ar-Based System For Supporting Decision-Making Process Of Change Orders In Construction Projects, Vi Nguyen Nguyen
Bim-Ar-Based System For Supporting Decision-Making Process Of Change Orders In Construction Projects, Vi Nguyen Nguyen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Recently, the integration of building information modeling (BIM) with augmented reality (AR) has been introduced to support decision-making on change orders in construction sites. However, traditional BIM-AR-based systems have some limitations on the interaction with the changes of construction work and cost information. Therefore, this research aims to develop a BIM-AR-based system to support the decision-making process of change orders during the construction phase. It includes four main functions: (1) visualization of change models and interaction with them in real-world environments, (2) cost assessment for calculating the direct cost of changes automatically and showing the information of cost comparison, (3) …