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Articles 7561 - 7590 of 39794

Full-Text Articles in Civil and Environmental Engineering

Identification Of Resilience Dimensions And Development Of A Decision-Making System To Measure The Resilience Level Of Highway Networks, Thahomina Jahan Nipa Dec 2021

Identification Of Resilience Dimensions And Development Of A Decision-Making System To Measure The Resilience Level Of Highway Networks, Thahomina Jahan Nipa

Civil Engineering Dissertations - Archive

Local as well as national economy and safety depend on the network characteristics of the transportation infrastructures. Destruction of transportation infrastructures causes the direct cost of the reconstruction as well as indirect cost due to loss of mobility. In addition, emergency response and recovery cannot be rendered if access to the affected community is hampered due to a damaged transportation network. Hence, researchers as well national and international organizations are focusing more on a resilience-based approach instead of a traditional recovery-based approach for the transportation infrastructures recently. As a result, there exist a high number of research articles that developed …

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Optimization Of Concrete Pavement Design To Truck Platoon Loading, Mohsen Talebsafa Dec 2021

Optimization Of Concrete Pavement Design To Truck Platoon Loading, Mohsen Talebsafa

Civil Engineering Dissertations - Archive

Transportation is the major contributor toward economic growth and development. In the United States, more than 90% of commodities are transported through the roadway system. Due to the high demand for transportation of goods, there is a high demand in the road freight industry for innovative solutions, and new technologies to improve the sustainability and efficiency of transportation. Truck platooning is one of the most recent technologies with great potential to make road freight safer, cleaner, and more efficient. This technology uses connectivity technologies and automated driving systems to interconnect two or more trucks in a convoy. These automation technologies …

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Evaluation Of Surface Asphalt Mixes Containing Recycled Asphalt Materials In North-East Texas Using Accelerated Pavement Testing, Ana Maria Coca Dec 2021

Evaluation Of Surface Asphalt Mixes Containing Recycled Asphalt Materials In North-East Texas Using Accelerated Pavement Testing, Ana Maria Coca

Civil Engineering Dissertations - Archive

Reclaimed asphalt pavement (RAP) and Reclaimed Asphalt Shingles (RAS) has proved to be an effective alternative to virgin materials in HMA production. Despite that recycling asphalt creates a cycle that optimizes the use of natural resources and sustains the pavement industry, State transportation departments have limited the maximum amount of RAP used in surface layers because of the variability concerns and lack of guidance provided. Even though at the moment, the United Stated recycles more RAP than Europe does in terms of percentage of the total RAP extracted from old pavements, it still lags Japan and other countries. A special …

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Reuse Of Recycled Plastic For Plastic Road Design, Tahsina Islam Dec 2021

Reuse Of Recycled Plastic For Plastic Road Design, Tahsina Islam

Civil Engineering Dissertations - Archive

The ever-increasing volume of traffic and the volatility of daily and seasonal temperatures that are being experienced globally make it essential that the quality and durability of roads are improved. Modifiers can improve the engineering properties of the asphalt mix in these situations. Perhaps plastics are the most promising of all types of modifiers. Since the disposal of plastic waste is a major concern for the environment, recycling of these waste materials is highly desired. The recycling and reuse of plastic waste is a prime example of sustainable waste management. It reduces the buildup of waste in landfills, thereby reducing …

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Measuring Foundation Course Modulus Using Falling Weight Deflectometer, Light Weight Deflectometer, And Dynamic Cone Penetration, Bruce Barrett, Kellie Troxel, Brady Dresselhaus, David Hansen Dec 2021

Measuring Foundation Course Modulus Using Falling Weight Deflectometer, Light Weight Deflectometer, And Dynamic Cone Penetration, Bruce Barrett, Kellie Troxel, Brady Dresselhaus, David Hansen

Nebraska Department of Transportation: Research Reports

The purpose of this investigation was to determine the feasibility of measuring bituminous foundation course modulus under concrete roadways by comparing testing results derived before and after paving using FWD, Light Weight Deflectometer (LWD), and Dynamic Cone Penetrometer (DCP). The foundation course modulus was determined using FWD data and Darwin design software (‘93 AASHTO). Results from Phase I data collection, which occurred prior to pavement placement, provided a baseline for comparison. The maximum modulus was 398,000 PSI and the minimum was 85,000 PSI, yielding a range of 315,000 PSI and an average modulus of 123,000 PSI over the length of …

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The Preconstruction Of Foundation For A Greenhouse, Alla I. Hashim Dec 2021

The Preconstruction Of Foundation For A Greenhouse, Alla I. Hashim

Construction Management

This project outlines the preconstruction process for building a concrete base for a prefabricated greenhouse unit. This project was initiated by the Cal Poly Garden Club so they could plan for the installation of a greenhouse at the Student Experimental Farm on Cal Poly’s campus. The members of the club currently share a greenhouse with another Cal Poly Club which restricts their ability to use the greenhouse freely. The initial goal of the project was to request a permit, however, that will be postponed until the specific location is determined. This project still provides the necessary elements for requesting a …

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A Linear Dynamical Perspective On Epidemiology: Interplay Between Early Covid-19 Outbreak And Human Mobility, Shakib Mustavee Dec 2021

A Linear Dynamical Perspective On Epidemiology: Interplay Between Early Covid-19 Outbreak And Human Mobility, Shakib Mustavee

Electronic Theses and Dissertations, 2020-2023

This research investigates the impact of human activity and mobility (HAM) in the spreading dynamics of an epidemic. Specifically, it explores the interconnections between HAM and its effect on the early spread of the COVID-19 virus. During the early stages of the pandemic, effective reproduction numbers exhibited a high correlation with human mobility patterns, leading to a hypothesis that the HAM system can be studied as a coupled system with disease spread dynamics. This study applies the generalized Koopman framework with control inputs to determine the nonlinear disease spread dynamics and the input-output characteristics as a locally linear controlled dynamical …

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Evapotranspiration In Mid-South Rice Production, Colby Wade Reavis Dec 2021

Evapotranspiration In Mid-South Rice Production, Colby Wade Reavis

Graduate Theses and Dissertations

Rice provides much needed sustenance to a large portion of the global population, particularly in the developing world. With stress placed on food production systems under the reality of climate change and an increasing global population, rice production systems require solutions to a number of issues, including a limited water supply. As producers explore new strategies for conserving local water resources to continue to maintain yields, new irrigation strategies and technologies are being developed and validated for use at commercial production scales. Alternate wetting and drying (AWD) is an irrigation practice that provides water savings through the capture of rainfall …

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Hydrogen Underground Storage Efficiency In A Heterogeneous Sandstone Reservoir, Doaa Saleh Mahdi, Emad A. Al-Khdheeawi, Yujie Yuan, Yihuai Zhang, Stefan Iglauer Dec 2021

Hydrogen Underground Storage Efficiency In A Heterogeneous Sandstone Reservoir, Doaa Saleh Mahdi, Emad A. Al-Khdheeawi, Yujie Yuan, Yihuai Zhang, Stefan Iglauer

Research outputs 2014 to 2021

Underground hydrogen storage has been recognized as a key technology for storing enormous amounts of hydrogen, thus aiding in the industrial-scale application of a hydrogen economy. However, underground hydrogen storage is only poorly understood, which leads to high project risk. This research thus examined the effect of caprock availability and hydrogen injection rate on hydrogen recovery factor and hydrogen leakage rate to address some fundamental questions related to underground hydrogen storage. A three dimensional heterogeneous reservoir model was developed, and the impact of caprock and hydrogen injected rate on hydrogen underground storage efficiency were analysed with the model. The results …

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Α-Fe2o3/Graphene Oxide Powder And Thin Film Nanocomposites As Peculiar Photocatalysts For Dye Removal From Wastewater, Mahsa Khoshnam, Javad Farahbakhsh, Masoumeh Zargar, Abdul Wahab Mohammad, Abdelbaki Benamor, Wei Lun Ang, Ebrahim Mahmoudi Dec 2021

Α-Fe2o3/Graphene Oxide Powder And Thin Film Nanocomposites As Peculiar Photocatalysts For Dye Removal From Wastewater, Mahsa Khoshnam, Javad Farahbakhsh, Masoumeh Zargar, Abdul Wahab Mohammad, Abdelbaki Benamor, Wei Lun Ang, Ebrahim Mahmoudi

Research outputs 2014 to 2021

In this study, hematite graphene oxide (αFe2O3-GO) powder nanocomposites and thin-film hematite graphene oxide (αFe2O3-GO) were synthesized for application in the removal of Rhodamine B (RhB) from textile wastewater. αFe2O3-GO nanomaterials were placed onto the FTO substrate to form a thin layer of nanocomposites. Different analysis including XRD, FTIR, Raman spectra, XPS, and FESEM were done to analyze the morphology, structure, and properties of the synthesized composites as well as the chemical interactions of αFe2O3 with GO. The photocatalytic performance of two synthesized composites was compared with different concentrations of αFe2O3-GO. The results showed that powder nanocomposites are more effective …

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Modeling Driver Distraction Mechanism And Its Safety Impact In Automated Vehicle Environment., Song Wang Dec 2021

Modeling Driver Distraction Mechanism And Its Safety Impact In Automated Vehicle Environment., Song Wang

Electronic Theses and Dissertations

Automated Vehicle (AV) technology expects to enhance driving safety by eliminating human errors. However, driver distraction still exists under automated driving. The Society of Automotive Engineers (SAE) has defined six levels of driving automation from Level 0~5. Until achieving Level 5, human drivers are still needed. Therefore, the Human-Vehicle Interaction (HVI) necessarily diverts a driver’s attention away from driving. Existing research mainly focused on quantifying distraction in human-operated vehicles rather than in the AV environment. It causes a lack of knowledge on how AV distraction can be detected, quantified, and understood. Moreover, existing research in exploring AV distraction has mainly …

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Analyzing The Non-Isothermal Multiphasic Flow In Porous Media Through Strongly Coupled Thermo-Hydro-Mechanical Modeling., Mohammadreza Mir Tamizdoust Dec 2021

Analyzing The Non-Isothermal Multiphasic Flow In Porous Media Through Strongly Coupled Thermo-Hydro-Mechanical Modeling., Mohammadreza Mir Tamizdoust

Electronic Theses and Dissertations

Underground geo-structures and climate change can trigger coupled heat, moisture, and vapor flow in shallow and deep subsurface which is frequently referred to as non-isothermal multiphase flow. The coupled multiphasic flow in soil may induce volumetric shrinkage or expansion deformation depending on the thermo-hydraulic loading condition. In saturated porous media, temperature gradient and heat transfer may affect pore fluid pressure and/or pore fluid flow depending on thermal, mechanical, and hydraulic properties of the media and the saturating fluid. In vadose zones, the prediction of coupled nonisothermal multiphase flow in porous media has been the subject of many theoretical and experimental …

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Building And Infrastructure Defect Detection And Visualization Using Drone And Deep Learning Technologies, Yuhan Jiang, Sisi Han, Yong Bai Dec 2021

Building And Infrastructure Defect Detection And Visualization Using Drone And Deep Learning Technologies, Yuhan Jiang, Sisi Han, Yong Bai

Civil and Environmental Engineering Faculty Research and Publications

This paper presents an accurate and stable method for object and defect detection and visualization on building and infrastructural facilities. This method uses drones and cameras to collect three- dimensional (3D) point clouds via photogrammetry, and uses orthographic or arbitrary views of the target objects to generate the feature images of points’ spectral, elevation, and normal features. U-Net is implemented in the pixelwise segmentation for object and defect detection using multiple feature images. This method was validated on four applications, including on-site path detection, pavement cracking detection, highway slope detection, and building facade window detection. The comparative experimental results confirmed …

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Slicing-Based Artificial Intelligence Service Provisioning On The Network Edge: Balancing Ai Service Performance And Resource Consumption Of Data Management, Mushu Li, Jie Gao, Conghao Zhou, Xuemin Shen, Weihua Zhuang Dec 2021

Slicing-Based Artificial Intelligence Service Provisioning On The Network Edge: Balancing Ai Service Performance And Resource Consumption Of Data Management, Mushu Li, Jie Gao, Conghao Zhou, Xuemin Shen, Weihua Zhuang

Civil and Environmental Engineering Faculty Research and Publications

Edge intelligence leverages computing resources on the network edge to provide artificial intelligence (AI) services close to network users. As it enables fast inference and distributed learning, edge intelligence is envisioned to be an important component of 6G networks. In this article, we investigate AI service provisioning for supporting edge intelligence. First, we present the features and requirements of AI services. Then we introduce AI service data management and customize network slicing for AI services. Specifically, we propose a novel resource-pooling method to regularize service data exchange within the network edge while allocating network resources for AI services. Using this …

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Progress And Prospect Of Anodic Oxidation For The Remediation Of Perfluoroalkyl And Polyfluoroalkyl Substances In Water And Wastewater Using Diamond Electrodes, Sean T. Mcbeath, Adrián Serrano Mora, Fatemeh Asadi Zeidabadi, Brooke K. Mayer, Patrick J. Mcnamara, Madjid Mohseni, Michael R. Hoffman, Nigel J. D. Graham Dec 2021

Progress And Prospect Of Anodic Oxidation For The Remediation Of Perfluoroalkyl And Polyfluoroalkyl Substances In Water And Wastewater Using Diamond Electrodes, Sean T. Mcbeath, Adrián Serrano Mora, Fatemeh Asadi Zeidabadi, Brooke K. Mayer, Patrick J. Mcnamara, Madjid Mohseni, Michael R. Hoffman, Nigel J. D. Graham

Civil and Environmental Engineering Faculty Research and Publications

Although diamond electrodes are widely used in the field of electroanalysis and sensing, their application in the field of environmental engineering has yet to be fully realized. Many research studies have considered their potential application in water and wastewater treatment, where the in-situ electrochemical process can avoid the need for chemical additives by facilitating the oxidation of pollutants on the electrode surface or mediated by electrochemically synthesized oxidants in solution. Diamond-based electro-oxidation can effectively treat a number of organic micropollutants and is now being evaluated for the abatement of perfluoroalkyl and polyfluoroalkyl substances, which pose health concerns and are ubiquitous …

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The Bridge Newsletter Winter 2021, Missouri University Of Science And Technology Dec 2021

The Bridge Newsletter Winter 2021, Missouri University Of Science And Technology

The Bridge Newsletter

-S&T contributes to infrastructure through national center
-Brinkmann leads Missouri Highways and Transportation Commission
-Wu wins NSF CAREER Award for 2D metals work
-Academy of Civil Engineers induction and 150th celebration

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An Investigation Of Phosphorus Removal By Purple Bacteria In Dairy Wastewater Lagoons, Lauren M. Gomez, Andrew J. Schuler, Jose M. Cerrto, David T. Hanson Dec 2021

An Investigation Of Phosphorus Removal By Purple Bacteria In Dairy Wastewater Lagoons, Lauren M. Gomez, Andrew J. Schuler, Jose M. Cerrto, David T. Hanson

Civil Engineering ETDs

The objective of this study was to determine whether the polyphosphate metabolism in purple photosynthetic bacteria (PPB) is similar to that of wastewater polyphosphate-accumulating organisms (PAOs) such as Accumulibacter. Dairy lagoon samples were studied in continuous and batch laboratory tests to evaluate whether cyclic light and dark conditions for PPB are similar to aerobic and anaerobic conditions for PAOs in domestic wastewater treatment systems. 16s rRNA gene amplicon sequencing indicated the presence of the purple sulfur bacterium Thiolamprovum (53.92%) in one lagoon source, and Thiodictyon (3.50%) in a second lagoon. Phosphorus contents were at least 0.7% higher than the …

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Hybrid Structural Health Monitoring Using Data-Driven Modal Analysis And Model-Based Bayesian Inference., Jice Zeng Dec 2021

Hybrid Structural Health Monitoring Using Data-Driven Modal Analysis And Model-Based Bayesian Inference., Jice Zeng

Electronic Theses and Dissertations

Civil infrastructures that are valuable assets for the public and owners must be adequately and periodically maintained to guarantee safety, continuous service, and avoid economic losses. Vibration-based structural health monitoring (VBSHM) has been a significant tool to assess the structural performance of civil infrastructures over the last decades. Challenges in VBSHM exist in two aspects: operational modal analysis (OMA) and Finite element model updating (FEMU). The former aims to extract natural frequency, damping ratio, and mode shapes using vibrational data under normal operation; the latter focuses on minimizing the discrepancies between measurements and model prediction. The main impediments to real-world …

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Building Energy Model Simulation Of A Single Building In Comparison To A Broader Building Stock, Paola Michelle Santillano Dec 2021

Building Energy Model Simulation Of A Single Building In Comparison To A Broader Building Stock, Paola Michelle Santillano

Open Access Theses & Dissertations

Residential facilities and buildings are the largest consumers of energy in the United States. More than 76% of electricity and more than 40% of all energy consumption comes from providing a comfortable and healthy environment in buildings. Prioritizing building energy technology goals for performance and cost can significantly reduce energy use within the next ten years despite a substantial forecasted population increase. Retrofitting existing buildings and improving future construction has the potential to realize cost savings and environmental benefits over time. A key component to realizing these benefits is regional building energy modeling. One of the challenges to widespread building …

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Identification And Evaluation Of Critical Transportation Infrastructure Resilience After Hydro-Meteorological Event, Herman Serrato Dec 2021

Identification And Evaluation Of Critical Transportation Infrastructure Resilience After Hydro-Meteorological Event, Herman Serrato

Open Access Theses & Dissertations

Modern civilization is dependent on essential infrastructure assets that allow society to function in today’s standards. Critical interdependent infrastructure such as transportation, communication, security, and public health are marvels of human innovation and an important aspect of civilization's evolution. Recent world events such as climate change have underlined the necessity to develop strategic plans to enhance the resilience of infrastructure. This study aimed to identify and evaluate the flooding potential of critical transportation infrastructure that will influence traffic flow and impact the economy. The technical workflow is based on observations, predictions, experiments, testing, and analysis to derive a resilience score …

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Drying Of Digested Biosolids For Weight Reduction Prior To Disposal, Juan Manuel Canales Dec 2021

Drying Of Digested Biosolids For Weight Reduction Prior To Disposal, Juan Manuel Canales

Open Access Theses & Dissertations

Disposal of belt filter pressed digested sludge (known as biosolids) to landfills cost El Paso Water about $1.1 million in the past year. With an increasing population, the amount of influent wastewater to El Paso treatment plants will also increase, resulting in increased biosolids generation and biosolids disposal costs. A method for reducing biosolids transportation cost is biosolids drying.The cost that El Paso Water pays for transporting biosolids to a dedicated landfill facility is based on the weight of the biosolids that are carried. Biosolids collected from the belt filter presses is about fifteen percent solids by weight, with water …

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Bathroom Remodel For Son Care Foundation, Inc., Tae Hun Kwak Dec 2021

Bathroom Remodel For Son Care Foundation, Inc., Tae Hun Kwak

Construction Management

The purpose of this paper is to provide insight into the process of remodeling a 42 SF bathroom for Son Care Foundation, Inc. The initial scope included the removal of an existing fiberglass bathtub, plumbing work, drywall installation, mudding, drywall texturing, new flooring, a new toilet, and a new sink. During construction, the owner requested that I add paint, an ADA-compliant sink, a new lighting fixture, a new vinyl baseboard, a new mirror, a new cabinet, new door trim, and new door hardware as part of my scope. I used what I learned in class to solve problems during the …

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Paso Robles Police Department Shooting Range Electrical Installation, Shelby I. Prosch Dec 2021

Paso Robles Police Department Shooting Range Electrical Installation, Shelby I. Prosch

Construction Management

The Paso Police Department has a shooting range for police officers to practice and master using firearms. A shooting range is a crucial part of police officer training to ensure public safety and correct and accurate usage of safety weapons. The construction for the shooting range began in the spring of 2021 by Cal Poly students where they laid the foundation. I became involved to further the progress of the shooting range by installing an electrical system. For that phase to begin, I completed a pre-construction package that details the materials and steps for installation. The package includes a scope …

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Granulated Blast Furnace Slag And Its Effects On Concrete Mixes, Adam Jacobson Dec 2021

Granulated Blast Furnace Slag And Its Effects On Concrete Mixes, Adam Jacobson

Construction Management

This paper explores what place slag, or granulated blast furnace slag has in our changing environment and evaluates how it compares to Portland cement. The purpose of this research is to discern how slag will be applicable in the future of construction and find what place it will have in concrete mixes. Slag is a Supplementary Cementitious Material (SCM) that is being utilized in more and more concrete applications due to its desirable properties and low environmental impact. Slag also reduces the amount of CO2 released that is produced in manufacturing and placing concrete. In this research, compressive strength of …

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Sustainability In Commercial Office Buildings, Jack Cullen Dec 2021

Sustainability In Commercial Office Buildings, Jack Cullen

Construction Management

Sustainability in the construction of commercial structures has been expanding through the recent years, largely in part due to the increasing ambitions to maintain a green and healthy planet. Regulations for including sustainable features in new or renovated commercial buildings have been growing throughout the country. In fact, many prospective buyers and lessees are even adding sustainable features to the list of what they look for in a potential place to buy or rent. This report will explore whether or not a building’s sustainable aspects appeal to buyers and lessees of commercial buildings, and if these sustainable aspects contribute to …

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Development Of A Topics Course For Construction Law, Julia C. Hoever Dec 2021

Development Of A Topics Course For Construction Law, Julia C. Hoever

Construction Management

The Cal Poly Construction Management program is designed to prepare students heading into the construction industry for daily management tasks. With construction comes many legal aspects integrated into a project’s operations. Though the curriculum includes a contract law course, a gap exists with a minimal number of classes that address the array of legal matters the construction industry must be versed in. Working with faculty member, Thomas Kommer, J.D., there is a need for a course that expands on these varying legal topics. In order to determine the specific topics that would impactfully benefit and educate Cal Poly Construction Management …

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Summer Construction Bootcamp Building Activities, Ashley Leeann Isla Dec 2021

Summer Construction Bootcamp Building Activities, Ashley Leeann Isla

Construction Management

This paper outlines the trade-specific building activities that will take place at Cal Poly’s Summer Construction Bootcamp in Summer, 2022. The four construction trades that will be highlighted at the camp are concrete, carpentry, sheet metal, and plumbing. During each day, campers will build a small project that aligns with each highlighted construction trade. During the concrete day, campers will create stepping stones and perform a cylinder break test; during carpentry, campers will compete in a wall framing exercise; for sheet metal, campers will construct sheet metal roses; and for plumbing, they will make copper pipe “CPs.” This paper describes …

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Analysis Of Self-Consolidating Concrete In Architectural Shear Wall Applications: Case Study, Peter Finocchio Dec 2021

Analysis Of Self-Consolidating Concrete In Architectural Shear Wall Applications: Case Study, Peter Finocchio

Construction Management

Architectural concrete surfaces have always been a point of focus for concrete contractors, architects, and owners, especially when consolidation poses risks due to a high density of reinforcement. Contractors have begun using self-consolidating concrete (SCC) in exposed vertical applications to combat the risk of poor consolidation. This paper investigates the characteristics of SCC and evaluates a case study of a recent project that was completed on the Central Coast of California. The study examines the cost variance between using SCC mix and a standard mix in architectural shear walls. The analysis is done by evaluating a multi-story Type 1A structure …

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Reimagining The Construction Vest Through The Facilitation Of A Hackathon, Cole Bernabei Dec 2021

Reimagining The Construction Vest Through The Facilitation Of A Hackathon, Cole Bernabei

Construction Management

This paper outlines the organizational process prior to hosting a Hackathon event in the upcoming year. When the event happens, it will be held in the Simpson Strong-Tie Building on California Polytechnic State University’s Campus. Data from a previous study shows that many individuals feel the current construction vest is flawed; the fit as currently designed is unfit for women. To resolve this, this paper will identify how a Hackathon can help produce a new prototype for the standard construction vest, while also highlighting the steps taken to develop a sound logistics plan and a financial breakdown for the event. …

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Son Care Handicap Ramp And Fence, Brendan T. Mulholland Dec 2021

Son Care Handicap Ramp And Fence, Brendan T. Mulholland

Construction Management

The purpose of this project was to build a fence on one side of the parking lot and a handicap entrance ramp for the front entrance of the Son Care Foundation in San Luis Obispo, California. This project aims to help limit the edge of the parking lot so that cars are not parked to far into the neighboring field and to make the front office more accessible to customers. The parking lot for The Son Care Foundation is located next to a field that is used for a multitude of tasks. With nothing to separate the two areas from …

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