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Articles 421 - 450 of 7868

Full-Text Articles in Civil and Environmental Engineering

In Situ Monitoring Of The Hydration Of Calcium Silicate Minerals In Cement With A Remote Fiber-Optic Raman Probe, Bohong Zhang, Wenyu Liao, Hongyan Ma, Jie Huang Sep 2023

In Situ Monitoring Of The Hydration Of Calcium Silicate Minerals In Cement With A Remote Fiber-Optic Raman Probe, Bohong Zhang, Wenyu Liao, Hongyan Ma, Jie Huang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study utilized a novel in situ fiber-optic Raman probe to continuously monitor the hydration progress of tricalcium silicate (C3S) and dicalcium silicate (C2S) without the need for sampling, from early hydration stage to later stages, and from fresh to hardened states of paste samples. By virtue of the remarkable ability of this technique in characterizing either dry or wet and crystalline or amorphous samples, the hydration processes of C3S and C2S pastes with different water-to-solid (w/s) ratios could be monitored from the start of the hydration reaction. The main hydration products, …

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Data-Driven Analysis Of Construction Bidding Stage-Related Causes Of Disputes, Muaz O. Ahmed, Islam H. El-Adaway Sep 2023

Data-Driven Analysis Of Construction Bidding Stage-Related Causes Of Disputes, Muaz O. Ahmed, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Construction bidding is a complex process that involves several potential risks and uncertainties for all the stakeholders involved. Such complexities, risks, and uncertainties, if uncontrolled, can lead to the rise of claims, conflicts, and disputes during the course of a project. Even though a substantial amount of knowledge has been acquired about construction disputes and their causation, there is a lack of research that examines the causes of disputes associated with the bidding phase of projects. This study addresses this knowledge gap within the context of infrastructure projects. In investigating and analyzing the causation of disputes related to the bidding …

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In Situ Monitoring Of The Hydration Of Calcium Silicate Minerals In Cement With A Remote Fiber-Optic Raman Probe, Bohong Zhang, Wenyu Liao, Hongyan Ma, Jie Huang Sep 2023

In Situ Monitoring Of The Hydration Of Calcium Silicate Minerals In Cement With A Remote Fiber-Optic Raman Probe, Bohong Zhang, Wenyu Liao, Hongyan Ma, Jie Huang

Electrical and Computer Engineering Faculty Research & Creative Works

This study utilized a novel in situ fiber-optic Raman probe to continuously monitor the hydration progress of tricalcium silicate (C3S) and dicalcium silicate (C2S) without the need for sampling, from early hydration stage to later stages, and from fresh to hardened states of paste samples. by virtue of the remarkable ability of this technique in characterizing either dry or wet and crystalline or amorphous samples, the hydration processes of C3S and C2S pastes with different water-to-solid (w/s) ratios could be monitored from the start of the hydration reaction. the main hydration products, calcium silicate hydrate (C–S–H) and portlandite/calcium hydroxide (CH), …

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Final Report - Augmenting Bridge Inspection With Augmented Reality And Haptics Based Aerial Manipulation, Paul Oh, Blake Hament, Dongbin Kim Aug 2023

Final Report - Augmenting Bridge Inspection With Augmented Reality And Haptics Based Aerial Manipulation, Paul Oh, Blake Hament, Dongbin Kim

Project AS-7

Insight and leverage from prior project identified the need for haptics; the inspector’s sense of touch is often used in bridge assessment. Envisioned is the augmentation of bridge personnel by providing a haptics-based aerial manipulator. Such a manipulator would reduce needs to ascend elevated structures like under bridge decks and cabling. There is recent work that uses haptics in aerial manipulation. But these center on autonomous multi-drone flight formation for aerial shows or cooperative object delivery and are relatively straight-forward. The sense of touch is used to provide spatial distance between drones. By contrast, this proposal’s novelty and merit are …

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Utilizing Waste Latex Paint Toward Improving The Performance Of Concrete, Mohamed Leithy, Eslam Gomaa, Ahmed A. Gheni, Mohamed Elgawady Aug 2023

Utilizing Waste Latex Paint Toward Improving The Performance Of Concrete, Mohamed Leithy, Eslam Gomaa, Ahmed A. Gheni, Mohamed Elgawady

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In this paper, incorporating the waste latex paint (WLP) into the conventional concrete as a partial replacement of sand to improve its durability was investigated. The fresh and hardened characterizations, in addition to the durability of concrete, were examined. The slump test was used to evaluate the fresh properties, while the hardened properties were evaluated through the volume of voids and absorption rate, in addition to the compressive, splitting tensile, and flexural strengths tests. The durability performance was evaluated by the surface resistivity, bulk electrical resistivity, as well as freeze and thaw resistance tests. The results showed a reduction in …

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Behavior Of Ultrahigh-Performance Concrete Plates Encasing Steel H-Piles, Mohamed Elgawady, Binod Shrestha Aug 2023

Behavior Of Ultrahigh-Performance Concrete Plates Encasing Steel H-Piles, Mohamed Elgawady, Binod Shrestha

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Steel H-piles are exposed during their service life to wet-dry cycles in combination with salts, such as deicing, that may result in corrosion, leading to cross-sectional loss and reduction in axial load-carrying capacity. This paper proposes an innovative repair method for corroded steel H-piles using ultrahigh-performance concrete (UHPC) plates. The UHPC plates are reinforced with carbon fiber-reinforced polymer (CFRP) grids. The UHPC plates bridge the corroded segment so that the axial force bypasses the corroded segment. The UHPC are bolted to the steel H-pile using high-strength bolt connectors (HSBCs). Eleven steel H-piles bolted with UHPC plates were investigated experimentally under …

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Effect Of Competitive Adsorption Between Specialty Admixtures And Superplasticizer On Structural Build-Up And Hardened Property Of Mortar Phase Of Ultra-High-Performance Concrete, Le Teng, Jingjie Wei, Kamal Khayat, Joseph J. Assaad Aug 2023

Effect Of Competitive Adsorption Between Specialty Admixtures And Superplasticizer On Structural Build-Up And Hardened Property Of Mortar Phase Of Ultra-High-Performance Concrete, Le Teng, Jingjie Wei, Kamal Khayat, Joseph J. Assaad

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study aims to enhance structural build-up of ultra-high-performance concrete (UHPC) without influencing the initial flowability, which is critical in repair applications (e.g., use of UHPC in thin bonded overlays for bridge deck rehabilitation). Specialty admixtures, such as a viscosity-modifying admixture (VMA), have been used to enhance the structural build-up at rest. However, the use of specialty admixtures can increase superplasticizer (SP) demand to maintain proper flowability; the synergistic effect of these admixtures on structural build-up is not well understood as the coupled admixture content can reverse the net effect on yield stress, viscosity, and thixotropy. In this study, VMAs …

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Development And Characterization Of Coal-Based Thermoplastic Composite Material For Sustainable Construction, Haibin Zhang, Wenyu Liao, Genda Chen, Hongyan Ma Aug 2023

Development And Characterization Of Coal-Based Thermoplastic Composite Material For Sustainable Construction, Haibin Zhang, Wenyu Liao, Genda Chen, Hongyan Ma

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The exploitation of coal and the disposal of waste plastic present significant environmental and economic challenges that require sustainable and profitable solutions. In response, we propose a renewable construction composite material of coal-based thermoplastic composite (CTC) that can be made from low-grade coal and plastic waste. We developed and tested the hot-press fabrication method for this CTC, using coal with a maximum particle size of 4.75 mm and recycled high-density polyethylene (HDPE). The effects of the coal fraction (50–80 wt.%) on compressive properties, thermal properties, microstructure, and ecological and economic efficiencies of the CTC were investigated. Test results revealed that …

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Machine Learning-Based Seismic Damage Assessment Of Residential Buildings Considering Multiple Earthquake And Structure Uncertainties, Xinzhe Yuan, Liujun Li, Haibin Zhang, Yanping Zhu, Genda Chen, Cihan H. Dagli Aug 2023

Machine Learning-Based Seismic Damage Assessment Of Residential Buildings Considering Multiple Earthquake And Structure Uncertainties, Xinzhe Yuan, Liujun Li, Haibin Zhang, Yanping Zhu, Genda Chen, Cihan H. Dagli

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Wood-frame structures are used in almost 90% of residential buildings in the United States. It is thus imperative to rapidly and accurately assess the damage of wood-frame structures in the wake of an earthquake event. This study aims to develop a machine-learning-based seismic classifier for a portfolio of 6,113 wood-frame structures near the New Madrid Seismic Zone (NMSZ) in which synthesized ground motions are adopted to characterize potential earthquakes. This seismic classifier, based on a multilayer perceptron (MLP), is compared with existing fragility curves developed for the same wood-frame buildings near the NMSZ. This comparative study indicates that the MLP …

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A Spike-Shaped Anchorage For Steel Reinforced Polymer (Srp)-Strengthened Concrete Structures, Xingxing Zou, Keenan L. Mcburney, Lesley H. Sneed Jul 2023

A Spike-Shaped Anchorage For Steel Reinforced Polymer (Srp)-Strengthened Concrete Structures, Xingxing Zou, Keenan L. Mcburney, Lesley H. Sneed

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Steel reinforced polymer (SRP) composite has recently emerged as an effective and economical solution for strengthening of reinforced concrete (RC) structures. Premature debonding failure of unanchored SRP at low load levels generally governs the performance of RC structures strengthened with externally bonded SRP. Therefore, a novel yet simple spike-shaped anchorage system was proposed in this study to prevent the debonding failure of SRP and to improve the interfacial shear capacity. Experimental investigation through single-lap shear tests of SRP-concrete joints showed that the anchorage system changed the failure mode from composite debonding to fiber rupture. In addition, the anchorage system substantially …

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Experiential Learning And Exposure To Professional Experience In Civil Engineering Education, Sanjay Tewari Jul 2023

Experiential Learning And Exposure To Professional Experience In Civil Engineering Education, Sanjay Tewari

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Experiential learning is increasingly recognized as a crucial component of modern education, especially in fields like civil engineering, where practical skills and real-world exposure are paramount. This paper explores the various avenues through which civil engineering education can offer professional exposure and experiential learning opportunities. By analyzing the impact of senior seminars, internships, co-ops, undergraduate research, study abroad programs, service learning, student design teams, leadership positions, and involvement in technical and professional student organizations, this paper aims to underscore the importance of these approaches in shaping well-rounded and industry-ready civil engineers.

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Effect Of Internal Curing And Shrinkage-Mitigating Materials On Microstructural Characteristics Of Fiber-Reinforced Mortar, Kamran Aghaee, Kamal Khayat Jul 2023

Effect Of Internal Curing And Shrinkage-Mitigating Materials On Microstructural Characteristics Of Fiber-Reinforced Mortar, Kamran Aghaee, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Internal curing (IC) and other shrinkage mitigating materials are employed to reduce shrinkage and risk of cracking. This study investigates the efficiency of individual versus combined use of IC and shrinkage mitigating materials on key characteristics of fiber-reinforced mortar (FRM). The investigated mixtures include a 25% pre-saturated lightweight sand (LWS) that is added individually and combined with 10% CaO-based expansive agent (EA) and 2% shrinkage reducing admixture (SRA). This elucidates the synergistic effect of high content IC and EA/SRA on macro- and micro-mechanical characteristics of FRM, especially at the interface of the matrix with fibers. Mechanical properties, microstructural characteristics, and …

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A Strong And Ductile Cobalt-Free Solid-Solution Fe30ni30mn30cr10 Multi-Principal Element Alloy From Hot Rolling, Hans Pommerenke, Jiaqi Duan, Nathan Curtis, Victor Delibera, Adam Bratten, Andrew Hoffman, Mario Buchely, Ronald O'Malley, Haiming Wen Jul 2023

A Strong And Ductile Cobalt-Free Solid-Solution Fe30ni30mn30cr10 Multi-Principal Element Alloy From Hot Rolling, Hans Pommerenke, Jiaqi Duan, Nathan Curtis, Victor Delibera, Adam Bratten, Andrew Hoffman, Mario Buchely, Ronald O'Malley, Haiming Wen

Materials Science and Engineering Faculty Research & Creative Works

Most of the face-centered cubic (FCC) multi-principal element alloys (MPEAs) developed thus far contain cobalt. for many applications, it is either required or beneficial to avoid cobalt, since cobalt has long-term activation issue (for nuclear applications), is expensive, and is considered a critical material. in addition, FCC structured solid-solution MPEAs tend to have relatively low strength. an FCC solid-solution Fe30Ni30Mn30Cr10 (at %) MPEA was fabricated via arc melting, followed by homogenization at 1100 °C for 12 h. the alloy was hot rolled at 1100 °C with a total reduction of up to 97 %. the microstructure was characterized, and mechanical …

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Viscoelastic Properties Of Fresh Cement Paste: Measuring Procedures And Influencing Parameters, Ammar Yahia, Arnaud Perrot, Dimitri Feys, Kamal Khayat, Mohammed Sonebi, Shiho Kawashima, Wolfram Schmidt Jul 2023

Viscoelastic Properties Of Fresh Cement Paste: Measuring Procedures And Influencing Parameters, Ammar Yahia, Arnaud Perrot, Dimitri Feys, Kamal Khayat, Mohammed Sonebi, Shiho Kawashima, Wolfram Schmidt

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Fresh cement pastes behave as viscoelastic materials below the flow onset. The measurements of viscoelastic properties of fresh cement paste provide valuable insight into the dispersion of solid particles as well as the hydration kinetics at early age and its influence on the structural evolution and solidification behavior at quasi-static conditions. Monitoring the development of viscoelastic properties of fresh cement paste using dynamic oscillatory shear measurements can also elucidate the working mechanisms of chemical admixtures. These properties are efficient indicators to guide mixture proportion design and are necessary to understand the rheology and stability of concrete. In this paper, the …

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Prediction Of Compressive Strength And Evaluation Of Different Theoretical Standards And Proposed Models Of Brick Columns Confined With Frp, Frcm, Or Srg System, Zuhair Al-Jaberi, John J. Myers Jul 2023

Prediction Of Compressive Strength And Evaluation Of Different Theoretical Standards And Proposed Models Of Brick Columns Confined With Frp, Frcm, Or Srg System, Zuhair Al-Jaberi, John J. Myers

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Strength Capacity of Confined Masonry Column is One of the Topics that Need to Be Studied. in This Study, the Efficiency of using Different Types of Advanced Composite (Non-Corrosive Materials) Such as Fiber Reinforced Polymer (FRP), Fiber Reinforced Cementitious Matrix (FRCM), or Steel Reinforced Grout (SRG) in Confining Masonry Columns is Investigated. a Wide Range of Experimental Database of Masonry Column Specimens Has Been Collected from the Results that Available in Scientific Literatures. Different Theoretical Standards and Proposed Models that Used to Predict the Capacity of Masonry Columns Confined with FRP and FRCM Are Evaluated based on Collected Experimental …

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On The Development Of Part-Scale Fem Modeling For Laser Powder Bed Fusion Of Aisi 316l Stainless Steel With Experimental Verification, Muhammad Arif Mahmood, Asif Ur Rehman, M. Mustafa Azeem, Abedalkader Alkhouzaam, Marwan Khraisheh Jul 2023

On The Development Of Part-Scale Fem Modeling For Laser Powder Bed Fusion Of Aisi 316l Stainless Steel With Experimental Verification, Muhammad Arif Mahmood, Asif Ur Rehman, M. Mustafa Azeem, Abedalkader Alkhouzaam, Marwan Khraisheh

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In laser powder bed fusion (LPBF), the effects of operating conditions on thermal gradients and residual stresses are the utmost challenges that require significant attention. The magnitudes of residual stress in the printed layers, as well as the distribution along the printed components, have not been well explained for LPBF parts. In this study, a 3D finite element thermo-mechanical model has been established to investigate the effect of operating conditions on thermal distribution, melt pool evolution, residual stress distribution, and part distortion. The printed AISI 316L stainless steel cubes have been characterized experimentally. The results showed a proportional correlation among …

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Final Report - Hyperspectral Imaging Analysis For Mechanical And Chemical Properties Of Concrete And Steel Surfaces, Genda Chen, Hongyan Ma, Pengfei Ma, Liang Fan, Abdullah Alhaj Jun 2023

Final Report - Hyperspectral Imaging Analysis For Mechanical And Chemical Properties Of Concrete And Steel Surfaces, Genda Chen, Hongyan Ma, Pengfei Ma, Liang Fan, Abdullah Alhaj

Project SN-5

This project aims to develop a hyperspectral imaging approach for characterizing the mechanical and chemical properties of concrete and steel surfaces. A dual-sensor camera is used to collect images for mortar classification, mortar compressive strength assessment, Cl- concentration determination, and steel rebar and plate corrosion evaluation. Each pixel in an image includes spectral features ranging from 400 nm to 2500 nm in wavelength. For mortar samples, reflectance intensities at a wavelength of 1920 nm to 1980 nm, associated with the O-H chemical bond, were extracted and averaged to classify the types of mortars with K-Nearest Neighbors (KNN) and Support Vector …

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Designing Local Food Systems: Results From A Three-Year Pilot, Daniel B. Oerther, Sarah Hultine-Massengale, Sarah E. Oerther Jun 2023

Designing Local Food Systems: Results From A Three-Year Pilot, Daniel B. Oerther, Sarah Hultine-Massengale, Sarah E. Oerther

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A Redesigned Course Employing Blended Delivery, a Flipped Format, and Modified Mastery Learning with a Buffet Approach to Assign Final Grades Was Used to Teach Engineering Design to Approximately 25 Dual-Level (Juniors, Seniors, and First Year Graduate) Students Pursuing Baccalaureate Degrees in Environmental, Civil, or Architectural Engineering or a Graduate Degree in Environmental Engineering. the Course Replaced a Traditional Pedagogical Format that Used Lecture-Discussion Augment with Extended Homework Assignments and a Semester-Long Design Project, Which Focused on the Content of Designing a Wastewater Treatment Plants. the Redesigned Course Uses the Engineering Design Process to Improve the Local Food System, Which …

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Environmental Engineering Division Panel Discussion: Exploring Career Paths In Academia - Learn, Network, And Thrive, Fethiye Ozis, David Sanchez, Matthew Alexander, Daniel B. Oerther, Shannon L. Isovitsch Parks Jun 2023

Environmental Engineering Division Panel Discussion: Exploring Career Paths In Academia - Learn, Network, And Thrive, Fethiye Ozis, David Sanchez, Matthew Alexander, Daniel B. Oerther, Shannon L. Isovitsch Parks

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Environmental Engineering Division Panel Will Provide an Opportunity to Learn from and Connect with Faculty and Leaders in the Environmental Engineering Field. Drawing on Expertise from the Premier Academic Organizations Associated with Environmental Engineering: The American Academy of Environmental Engineers and Scientists (AAEES), the Association of Environmental Engineering and Science Professors (AEESP), and the American Society of Civil Engineers (ASCE). the Panel is for All Graduate Students, Post-Docs and Early Career Faculty Who Are Interested in Receiving Advice and Networking to Advance their Careers in Environmental Engineering. the Panel Will Focus on Sharing the Experiences and Best Practices for …

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Panel Discussion: Ideas For An Enjoyable And Productive Sabbatical, Jean M. Andino, David V.P. Sanchez, Michelle Marincel Payne, John D. Carpinelli, Shannon L. Isovitsch Parks, Daniel B. Oerther Jun 2023

Panel Discussion: Ideas For An Enjoyable And Productive Sabbatical, Jean M. Andino, David V.P. Sanchez, Michelle Marincel Payne, John D. Carpinelli, Shannon L. Isovitsch Parks, Daniel B. Oerther

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Navigating the Sabbatical Process and Deciding on a Productive Activity Can Be Challenging. a Sabbatical Can Take Many Different Forms Depending on Career Goals, Interests, and Institution. the Purpose of This Panel Discussion is to Provide Faculty Who Have Yet to Conduct a Sabbatical with Ideas of Activities and the Process. a Variety of Personal Experiences Will Be Presented of Sabbatical Activities that Were Enjoyable and Productive. These May Include Sabbaticals Focused on Independent Engineering Research, Engineering Education Research, Development of Classes or Programs, Industry or Government Collaboration, And/or Travel. Discussion Topics Will Also Include Process Requirements of Applying, Conducting, …

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Workshop Result: Environmental Engineering Faculty Learning Boyer's Model Of Scholarship, Daniel B. Oerther, Jody Squires, Danny Willis Jun 2023

Workshop Result: Environmental Engineering Faculty Learning Boyer's Model Of Scholarship, Daniel B. Oerther, Jody Squires, Danny Willis

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

As Part of the 2021 (Delayed Until 2022 Due to COVID) Biennial Conference of the Association of Environmental Engineering and Science Professors (AEESP), a Preconference Workshop on the Topic of Ernst Boyer's Four-Pillar Model of Academic Scholarship in Higher Education (I.e., Discovery, Integration, Engagement, and the Science of Teaching and Learning) Was Delivered to 32 Workshop Participants. the Workshop Had Three Objectives, namely: 1) Raising Awareness to Boyer's Model of Scholarship in Higher Education; 2) Applying Boyer's Model to Evaluate Participants' Own Work; and 3) Leading Institutional Change by Sharing Boyer's Model Back Home. to Achieve These Objectives, Four Activities …

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Engagement In Practice: Promoting Environmental Health Literacy To Raise Awareness Of Antibiotic Resistance, Daniel B. Oerther Jun 2023

Engagement In Practice: Promoting Environmental Health Literacy To Raise Awareness Of Antibiotic Resistance, Daniel B. Oerther

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Process of How to Engage with Communities (I.e., Community Engagement) is an Important Skill for Engineers to Acquire, and the Skill is Well Suited to Experiential Learning (I.e., Learning through Doing). to Educate Engineers to Perform Community Engagement, a Module Was Developed and Incorporated as Part of Three Different Engineering Courses, namely: 1) Science, Technology, Engineering, Art, and Math (STEAM) Diplomacy (Dual-Level Graduate and Undergraduate, Elective); 2) Public Health Engineering (Dual-Level Graduate and Undergraduate, Elective); and 3) Biological Principles of Environmental Engineering (Graduate Only, Required Course). These Courses Were Offered at the Missouri University of Science and Technology and …

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Course Strategy: Threading Triple Bottom-Line Sustainability Across Multiple Courses, Daniel B. Oerther Jun 2023

Course Strategy: Threading Triple Bottom-Line Sustainability Across Multiple Courses, Daniel B. Oerther

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Instructional Environment for This Study Was the Missouri University of Science and Technology. Two Courses Offered through the Department of Civil, Architectural, and Environmental Engineering Are Discussed, specifically: CArE 2601 Fundamentals of Environmental Engineering; and CArE 5605 Environmental Modeling. the Pedagogical Approach to Delivery of Both Courses Included Blended Content Delivery, a Flipped Classroom, and Modified Mastery Learning. the Approach to Instruction and Technology Included Conceptual Understanding Before Spreadsheet Modeling to Verify Concepts through Application. the Course Content Focused Upon the Topic of "Triple Bottom Line Accounting" (Also Known as "Full Cost Accounting" or "True Cost Accounting"). This Content …

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Did The Nae Changing The Conversation Campaign Introduce The Care Penalty Into Engineering?, Daniel B. Oerther Jun 2023

Did The Nae Changing The Conversation Campaign Introduce The Care Penalty Into Engineering?, Daniel B. Oerther

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Over the Past Twenty Years, the National Academy of Engineering of the United States of America Undertook a Campaign Entitled, "Changing the Conversation." Explicit Intentions of the Campaign Included Raising Public Awareness of Engineering, Increasing the Total Number of Engineers, and Recruiting Historically Underrepresented Groups to Join Engineering. in Particular, Marketing Efforts Developed Inclusive "Tag Lines" Aimed to Diversify Groups Enrolled in Engineering and Increase the Diversity of the Professional Engineering Workforce. While Changes in Demographics Were Disappointing for Some Groups (I.e., Little to No Change Was Observed for People of Color), Generally, the Campaign Has Been Considered Moderately Successful …

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Rejuvenation Effect Of Aged Sbs-Modified Asphalt Utilizing Molecule Analysis, Ke Shi, Feng Ma, Jenny Liu, Zhen Fu, Ruimeng Song, Dongdong Yuan, Chen Li Jun 2023

Rejuvenation Effect Of Aged Sbs-Modified Asphalt Utilizing Molecule Analysis, Ke Shi, Feng Ma, Jenny Liu, Zhen Fu, Ruimeng Song, Dongdong Yuan, Chen Li

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Performance of Styrene-Butadiene-Styrene Modified Asphalt (SBSMA) is Significantly Impacted by its Aging and Regeneration. in This Research, the Molecular Dynamics Simulation Was Utilized to Investigate the Rejuvenation Effect of Active Reagents on Aged SBS Modified Asphalt through the Following Tasks: 1) Verifying the Accuracy of the Asphalt Model by Density and Solubility Parameters; 2) Assessing the Changes in the Rejuvenated Asphalt Model's Energetic Parameters and Volume Parameters, 3) Studying the Interaction Energy between SBS Molecules and Asphalt Molecule Models, and 4) Evaluating the Relative Concentration, Interfacial Interaction Energy, and Diffusion Effect of the Asphalt-Asphalt Models. the Results Indicated that …

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Influence Of Support Attachment Pattern On The Out-Of-Plane Buckling Capacity Of Steel Deck, Divyansh R. Kapoor, Brian Bogh, Kara D. Peterman Jun 2023

Influence Of Support Attachment Pattern On The Out-Of-Plane Buckling Capacity Of Steel Deck, Divyansh R. Kapoor, Brian Bogh, Kara D. Peterman

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

Diaphragms (Figure 1) serve as a critical component of a building's lateral force resisting system (LFRS), transferring lateral loads from the façade of the structure to the designated vertical lateral force resisting system. Design guidance for profiled steel diaphragm panels can be found in AISI S310 - 20 (AISI 2020) and SDI DDM04 (Luttrell 2015) and are controlled by connection limit states or buckling limit states. Deck connectivity with the underlying frame can either be fully attached (For example 36/7), i.e. connected through the bottom of each flute, or partially attached (for example 36/5 or 36/4) where not all the …

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Automated Detection And Characterization Of Cracks On Concrete Using Laser Scanning, Yunfeng Ge, Jenny Liu, Xiong Zhang, Huiming Tang, Xiaolong Xia Jun 2023

Automated Detection And Characterization Of Cracks On Concrete Using Laser Scanning, Yunfeng Ge, Jenny Liu, Xiong Zhang, Huiming Tang, Xiaolong Xia

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Accurate crack detection and characterization on concrete are essential for the maintenance, safety, and serviceability of various infrastructures. In this paper, an innovative approach was developed to automatically measure the cracks from 3D point clouds collected by a phase-shift terrestrial laser scanner (TLS) (FARO Focus3D S120). The approach integrates several techniques to characterize the cracks, which include the deviation on point normal determined using k-nearest neighbor (kNN) and principal components analysis (PCA) algorithms to identify the cracks, and principal axes and curve skeletons of cracks to determine the projected and real dimensions of cracks, respectively. The coordinate transformation was then …

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Field Implementation And Performance Of Fiber-Reinforced Low-Shrinkage Concrete For Bridge Deck Construction, Ahmed Abdelrazik, Kamal Khayat Jun 2023

Field Implementation And Performance Of Fiber-Reinforced Low-Shrinkage Concrete For Bridge Deck Construction, Ahmed Abdelrazik, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Paper Reports on the Field Implementation of Fiber-Reinforced Concrete (FRC) Used for Redecking the Two-Span overpass Bridge in Missouri. the Spans Measured 38.4 and 35.05 M in Length. Modeling of the Structural Behavior of the Bridge Replacement Deck Indicated Significantly High Tensile Stresses at Midspan (Up to 45 MPa) Due to the Continuity of the Deck over the Four Precast Main Girders. Redecking of the Bridge and Casting of the Central Diaphragm Were Carried Out Continuously and Necessitated 40 Concrete Truck Deliveries of 252 M3 of FRC. Six Sensor Towers Were Installed in the Bridge Deck to Monitor Variations …

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Rilem Tc 266-Mrp: Round-Robin Rheological Tests On High Performance Mortar And Concrete With Adapted Rheology—A Comprehensive Flow Curve Analysis, Dimitri Feys, Helena Keller, Khadija El Cheikh, Egor Secrieru, Yannick Vanhove Jun 2023

Rilem Tc 266-Mrp: Round-Robin Rheological Tests On High Performance Mortar And Concrete With Adapted Rheology—A Comprehensive Flow Curve Analysis, Dimitri Feys, Helena Keller, Khadija El Cheikh, Egor Secrieru, Yannick Vanhove

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A comprehensive testing program was carried out to compare the rheological properties of flowable concrete that can be obtained from different rheometers. The results obtained from seven rheometers using vane or similar geometries are discussed. A comprehensive flow curve analysis is undertaken for further comparison of the various rheometers. Partially, large differences could be observed between the results obtained from the different rheometers. However, the device-specific trendlines are shown to have significant correlations with the overall baseline. Two potential causes of differences between results are highlighted: imposition/registration of torque/rotational velocity and discrepancies between the measured material flow behavior in the …

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Preliminary Bond Capacity Exploration Between Monolayer Graphene And Cementitious Composites, Yanping Zhu, Chuanrui Guo, Genda Chen Jun 2023

Preliminary Bond Capacity Exploration Between Monolayer Graphene And Cementitious Composites, Yanping Zhu, Chuanrui Guo, Genda Chen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Study Aims to Explore Bond Capacity between Monolayer Graphene and Cementitious Composites for the First Time through a Pullout Test. the Low-Pressure Chemical Vapor Deposition Method Was Used to Synthesize Monolayer Graphene on the Copper Substrate to Be Embedded in the Mortar Made by the Briquette Mold. the Bond Capacity between Them Was Higher Than the Tensile Strength of the Copper Sheet with As-Grown Monolayer Graphene on the Surface Since All Specimens Failed in Fracture with Embedment Length of More Than 30 Mm. the Monolayer Graphene Enhanced the Copper Tensile Fracture Stress and Normalized Energy during the Test as …

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