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Rheology Modification Of Flowable Mortar With Co2, Sean Monkman, Soo Duck Hwang, Kamal Khayat 2024 Missouri University of Science and Technology

Rheology Modification Of Flowable Mortar With Co2, Sean Monkman, Soo Duck Hwang, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Rheological Properties of Mortar Samples with Different Additions of CO2 during Mixing Were Determined. Flowable Cement-Based Mortars at Three Different W/c (0.55, 0.45 and 0.35) Were Produced and the Effects of CO2 Gas Were Examined on the Fresh Properties of Slump Flow, Yield Stress and Plastic Viscosity. According to the Experimental Results, the Mortar Yield Stress and Plastic Viscosity Increased Faster over Time Than in a Reference System with the Increasing Addition of CO2 and Greater Effects Were Seen at the Lowest W/c of 0.35 Than at the Others. the Impact of the CO2 on …


Extrudability Window And Offline Test Methods To Predict Buildability Of 3d Printing Concrete, Yu cun Gu, Kamal H. Khayat 2024 Missouri Uninversity of Science and Technology

Extrudability Window And Offline Test Methods To Predict Buildability Of 3d Printing Concrete, Yu Cun Gu, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Study Investigates the Effect of Thixotropy and Stiffness Evolution on the Extrudability and Buildability of 3D Printing Concrete. Different Types of Supplementary Cementitious Materials and Limestone Filler Were Used to Prepare Mortars with Varying Levels of Thixotropy and Early-Age Stiffness. Mixtures with Yield Stress and Flocculation (Τfloc) of 180–400 and 420–950 Pa, Respectively, Exhibited Adequate Extrudability Without Plastic Collapse. the Printing Was Completed 8–15 Min after Mixing at a Vertical Build-Up Rate of 138 Mm/min. Several Process Parameters, Including Rest Time to Secure a Penetration Resistance of 150 KPa (T150) and Penetration Resistance at Various Rest Times Were Developed …


Development Of Multivariate-Coupled Grouting Diffusion Model For Rcc, Xiao Sun, Yao Wang, Hengrui Liu, Zhuanjia Yang, Hongyan Ma 2024 Missouri University of Science and Technology

Development Of Multivariate-Coupled Grouting Diffusion Model For Rcc, Xiao Sun, Yao Wang, Hengrui Liu, Zhuanjia Yang, Hongyan Ma

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Grouting Quality of Grout-Enriched Roller Compacted Concrete (RCC) is Difficult to Be Quantified Due to the Fact that the Crucial Effects, Such as Infiltration and the Compaction of the Skeleton of the RCC, Are Not Taken into Consideration. Combined with Model Testing, This Study Proposes an Improved Grouting Prediction Model Which Considers the Coupling Effect of Pore Fractal Properties, Time Variation of Grout Rheological Properties and Infiltration. Moreover, the Influence of Construction Parameters Such as Grouting Parameters, Construction Period Selection, Grouting Pipe Arrangement on the Grouting Effect Was Clarified. the Tests Indicated that the Maximum Diffusion Range of Slurry …


3d Printing Technology: Challenges, And Potentials In Achieving Sustainable Buildings, Sahar Mohamed Abd El rahman, Sobhy Ibrahim Esmail 2024 Modern Academy for Engineering &Technology.

3d Printing Technology: Challenges, And Potentials In Achieving Sustainable Buildings, Sahar Mohamed Abd El Rahman, Sobhy Ibrahim Esmail

Journal of Engineering Research

The utilization of 3D printing technology in building construction has emerged as a promising approach with the potential to revolutionize the industry and significantly impact sustainability. This paper examines the role of 3D printing in building construction and explores its implications for sustainability. Through the ability to fabricate complex designs with precision and efficiency, 3D printing offers advantages such as reduced material waste, lower energy consumption, and decreased carbon emissions. Additionally, the use of locally sourced, recyclable materials combined with the customization capabilities of 3D printing enhances resource efficiency and minimizes environmental impact. Furthermore, the construction process is streamlined, leading …


Towards More Inclusive Cities By Promoting Diversity And Inclusion, Asmaa Mostafa ELshamy 2024 Menfia university

Towards More Inclusive Cities By Promoting Diversity And Inclusion, Asmaa Mostafa Elshamy

Journal of Engineering Research

The primary goal of promoting diversity and inclusion in cities is to ensure that every individual regardless of race, gender, sexual orientation, socioeconomic status or ability feels valued, respected and included. It goes beyond mere tolerance and seeks to actively embrace and celebrate differences. By fostering inclusive environments, cities can harness the collective power and potential of their diverse populations, leading to enhanced social well-being, economic growth, and innovation. The need to harness the potential of diversity and inclusion to achieve full social, economic, and cultural benefits has become increasingly clear in recent years. This goes beyond just inclusion and …


Agility Opportunities In Construction Project Management “Exploring Opportunities In Construction Projects In Integration With Waterfall Methodology.”, Nevine G. Gado Dr., Noha A, Elsayed Dr 2024 Modern academy for engineering and technology

Agility Opportunities In Construction Project Management “Exploring Opportunities In Construction Projects In Integration With Waterfall Methodology.”, Nevine G. Gado Dr., Noha A, Elsayed Dr

Journal of Engineering Research

The objective of project management for construction projects is to deliver projects that meet customer requirements, business values, and goals in the most efficient manner. Project management is considered one of the vastly debated fields currently while the commonly adopted approach is still the waterfall model. However, in today's construction market, the number of different stakeholders,’ and the way projects awarded are changing. This has created a gap between management's belief of how today's construction projects should be conducted and how they are executed. Despite the growing importance of traditional construction project management as the preferred project delivery method, there …


Spatial Environmental Suitability For The Localization Of Sanitary Waste Landfills In Egypt Using Environmental Information Systems: Applying To Safaga Qism, Wessam Mostafa Emam, Dalia Mahmoud Hassan 2024 Environmental planning department, Faculty of Urban and Regional Planning, Cairo University

Spatial Environmental Suitability For The Localization Of Sanitary Waste Landfills In Egypt Using Environmental Information Systems: Applying To Safaga Qism, Wessam Mostafa Emam, Dalia Mahmoud Hassan

Journal of Engineering Research

This research focuses on the application of an environmental information system to help achieve balance and interrelation between the various environmental standards affecting the selection of the site to the sanitary landfill in the touristic Safaga qism of the Red Sea. According to the sustainable development strategy of Egypt’s Vision 2030, the issue of solid waste is one of the most important environmental challenge that faced sustainable development in Egypt. In light of the increasing number of unauthorized dumps of waste that pollute the environment, the Ministry of Environment adopted a national project to establish a network of sanitary landfills, …


Alhambra Alcazaba In Granada (Historical And Architectural Study), Ibrahim Abu Irmies 2024 Al-Quds Open University, Palestine

Alhambra Alcazaba In Granada (Historical And Architectural Study), Ibrahim Abu Irmies

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

The research focused on Alcazaba, fortress, of the Alhambra, located in the city of Granada in Al-Andalus, the reasons for its name, its geographical location, the reasons for its construction and how it is different from the old Alcazaba in Granada. It also discussed the historical stages of its construction since the era of the Umayyad State, the Zirid Dynasty as well as the era of the al-Muwahhidin and finally during the era of the state of Nasrid. The study was also supported by some evidence from the original historical sources, and important signs from the history of the internal …


The Architectural Characteristics Of The Palaces Of The Sultanate Of Al -Qaiti In Hadramout, Sabri Al-Tarimi, Fahed Jawher, Abdulaziz Al-Naggar 2024 Hadhramout University, Yemen

The Architectural Characteristics Of The Palaces Of The Sultanate Of Al -Qaiti In Hadramout, Sabri Al-Tarimi, Fahed Jawher, Abdulaziz Al-Naggar

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

The architectural characteristics of the Al -Qaiti palaces in Hadramout are one of the important topics that must be addressed to promote the architectural values and principles in those buildings and include them to the modern architectural style that expresses the architectural identity of the region. This study was divided into an introduction, analytical study, results and recommendations. The introduction included the research problem, the importance, objectives and methodology of research and the theoretical framework that included a historical overview of Hadramout and the history of the Sultanate of Al -Qaiti. In addition, a detailed and analytical explanation of the …


Synergetic Effect Of Viscosity Modifying Admixtures And Polycarboxylate Ether Superplasticizer On Key Characteristics Of Thixotropic Uhpc For Bonded Bridge Deck Overlay Rehabilitation, Le Teng, Ming Jin, Jiadi Du, Kamal H. Khayat 2024 Missouri University of Science and Technology

Synergetic Effect Of Viscosity Modifying Admixtures And Polycarboxylate Ether Superplasticizer On Key Characteristics Of Thixotropic Uhpc For Bonded Bridge Deck Overlay Rehabilitation, Le Teng, Ming Jin, Jiadi Du, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Thin bonded ultra-high-performance concrete (UHPC) overlay is an advanced technology for bridge deck rehabilitation. UHPC should be tailored to secure adequate flowability and high thixotropy to facilitate mixing and placement with a low risk of sagging of the material on sloped bridge deck surfaces. The synergetic effect between nano clay (NC) and polycarboxylate ether (PCE) superplasticizer or cellulose-based viscosity modifying admixture (VMA) and PCE on the rheological properties (yield stress, plastic viscosity, and thixotropy), cement hydration, autogenous shrinkage, compressive strength, and porosity was systematically investigated. The bond strength between conventional concrete (CC) representing existing bridge deck concrete and thixotropic UHPC …


Rotational Rheometry Test Of Portland Cement-Based Materials – A Systematic Literature Review, Laura Silvestro, Artur Spat Ruviaro, Geannina Lima, Luís Urbano Durlo Tambara Júnior, Dimitri Feys, Ana Paula Kirchheim 2024 Missouri University of Science and Technology

Rotational Rheometry Test Of Portland Cement-Based Materials – A Systematic Literature Review, Laura Silvestro, Artur Spat Ruviaro, Geannina Lima, Luís Urbano Durlo Tambara Júnior, Dimitri Feys, Ana Paula Kirchheim

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Study Systematically Reviews 62 Papers on the Use of Rotational Rheometry to Assess the Fresh State Behavior of Portland Cement-Based Materials. the Research Highlights the Wide Variation in Test Methods and Aims to Provide a Comprehensive overview. Findings Reveal that 50.0% of Studies Employed Vane Geometry, despite its Limitations in Providing Transformation Equations. Regarding Dynamic Shearing Tests, 67.0% Followed a Consensus using a Pre-Shearing Step and a Stepwise Routine with Stabilization Times ≥ 10 S. While the Bingham Model is Commonly Used, the Study Emphasizes the Importance of Considering Shear-Thinning Behavior in Cementitious Materials. Models Like Herschel-Bulkley and Modified …


Son Care Foundation – Lean To Shade Structure Design And Construction, Ryan Joseph McCann 2024 California Polytechnic State University, San Luis Obispo

Son Care Foundation – Lean To Shade Structure Design And Construction, Ryan Joseph Mccann

Construction Management

This paper discusses the design and construction of a lean-to-shade structure built for the Son Care Foundation in San Luis Obispo. The Son Care Foundation is a nonprofit organization that raises guide dogs for veterans and first responders with PTSD. This shade structure is 16 feet long and 6 feet wide, its height slopes from 9 feet in the front down to 8 feet in the back creating a roof pitch of 2:12. The sheet metal roof also has an overhang of approximately 1 foot. As requested by the client, the shade structure was designed to fit the aesthetic of …


Application Of Multidisciplinary Community Resilience Modeling To Reduce Disaster Risk: Building Back Better, Wanting "lisa" Wang, John W. Van De Lindt, Blythe Johnston, P. Shane Crawford, Guirong Grace Yan, Thang Dao, Trung Do, Katie Skakel, Mojtaba Harati, Tu Nguyen, Robinson Umeike, Silvana Croope, Andre R. Barbosa 2024 Missouri University of Science and Technology

Application Of Multidisciplinary Community Resilience Modeling To Reduce Disaster Risk: Building Back Better, Wanting "Lisa" Wang, John W. Van De Lindt, Blythe Johnston, P. Shane Crawford, Guirong Grace Yan, Thang Dao, Trung Do, Katie Skakel, Mojtaba Harati, Tu Nguyen, Robinson Umeike, Silvana Croope, Andre R. Barbosa

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

From december 10 to december 11, 2021, a deadly tornado outbreak struck across several states in the us, including arkansas, illinois, kentucky, and tennessee. This tornado outbreak resulted in at least $3.9 Billion in damage, more than 90 fatalities, and hundreds of injuries. Mayfield, kentucky, a small city in the eastern united states, was hit by a long-track tornado rated as an enhanced fujita 4 (ef4) scale and was one of the communities most heavily damaged during the tornado outbreak. Following the 2021 tornado event, an analysis was performed in the interdependent networked community resilience modeling environment (in-core) for the …


Architecture As A Carbon-Based Practice, Qixin Yu 2024 Rhode Island School of Design

Architecture As A Carbon-Based Practice, Qixin Yu

Masters Theses

Carbon serves as both a silent protagonist and a looming antagonist in the narrative of architecture, shaping not only the physical structures we inhabit but also the ecological legacy we leave behind.

Centuries of human exploitation of the environment have led to climate and material crises. Shifting this dynamic requires action at micro (matter), meso (material), and macro (materiality) levels. Biogenic materials offer significant potential for carbon sequestration and present opportunities for the building industry to collaborate with nature rather than merely extract from it.

This thesis establishes a research and manufacturing practice that prioritizes material innovation, carbon sequestration, environmental …


What Does Water Want?, Julia Woznicki 2024 Rhode Island School of Design

What Does Water Want?, Julia Woznicki

Masters Theses

This thesis begins with an exploration of our relationship with water at multiple scales, from microscopic study of desert moss to macroscopic research of freshwater resources. It evolves to embody a methodology of holistic, bioregional design that interweaves systems of ecology, economy, material landscape, and reconsideration of temporality in our built environment. This project also explores how that methodology may adapt between the Global North and the Global South.

No new plastic has been used in the process of this thesis. Material innovation using hemp hurd guides the exploration of how biomimetic principles can be achieved not only through form …


Daylighting In Buildings: Investigating The Relationship Between Daylight Levels And Building Compactness In Various Contemporary Architectural Types. [Efficient Typology Classification], Andrew Welch, Ermal Shpuza PhD 2024 Kennesaw State University

Daylighting In Buildings: Investigating The Relationship Between Daylight Levels And Building Compactness In Various Contemporary Architectural Types. [Efficient Typology Classification], Andrew Welch, Ermal Shpuza Phd

Symposium of Student Scholars

One of the key ways of improving the energy efficiency of a building is to enhance the daylight levels and reduce the need for artificial lighting. Good daylight levels are also associated with increased productivity and the well-being of a building's occupants. Daylight levels are often a direct function of the floorplate depth, where locations near the windows receive more daylight, and those deep inside the buildings receive less. As a result, shallow floorplates and elongated buildings are usually related to higher daylight levels. However, shallow buildings that have more natural light are also associated with greater construction costs due …


Advancing Simultaneous Extraction And Sequential Single-Particle Icp-Ms Analysis For Metallic Nanoparticle Mixtures In Plant Tissues, Lei Xu, Xingmao Ma, John Yang, Joel G. Burken, Paul Ki-souk Nam, Honglan Shi, Hu Yang 2024 Missouri University of Science and Technology

Advancing Simultaneous Extraction And Sequential Single-Particle Icp-Ms Analysis For Metallic Nanoparticle Mixtures In Plant Tissues, Lei Xu, Xingmao Ma, John Yang, Joel G. Burken, Paul Ki-Souk Nam, Honglan Shi, Hu Yang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Engineered Nanoparticles (ENPs) Have Been Increasingly Used in Agricultural Operations, leading to an Urgent Need for Robust Methods to Analyze Co-Occurring ENPs in Plant Tissues. in Response, This Study Advanced the Simultaneous Extraction of Coexisting Silver, Cerium Oxide, and Copper Oxide ENPs in Lettuce Shoots and Roots using Macerozyme R-10 and Analyzed Them by Single-Particle Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). Additionally, the Standard Stock Suspensions of the ENPs Were Stabilized with Citrate, and the Long-Term Stability (Up to 5 Months) Was Examined for the First Time. the Method Performance Results Displayed Satisfactory Accuracies and Precisions and Achieved Low Particle Concentration …


Chloride Binding Mechanism In Seawater-Mixed Uhpc, Wei Zhang, Dawei Ding, Mengmeng Li, Tiao Wang, Hongyan Ma, Binmeng Chen, Hongxing Hu, Jizhou Chen, Xiaomin Liu, Dongshuai Hou 2024 Missouri University of Science and Technology

Chloride Binding Mechanism In Seawater-Mixed Uhpc, Wei Zhang, Dawei Ding, Mengmeng Li, Tiao Wang, Hongyan Ma, Binmeng Chen, Hongxing Hu, Jizhou Chen, Xiaomin Liu, Dongshuai Hou

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The rapid development of marine concrete structures and the sharp shortage of freshwater resources contribute to the wide investigation of seawater-mixed ultra-high-performance concrete (swuhpc). However, few studies have investigated the chloride ions (cl-) binding mechanism of swuhpc. Herein, the chloride binding experiments and molecular dynamics (md) simulation were carried out to reveal the physically and chemically bound cl- mechanisms of swuhpc. The results of the experiments clearly demonstrate that the addition of silica fume (sf) led to a significant decrease in the capacity of cl- binding. Conversely, the incorporation of metakaolin (mk) resulted in a marked increase in the content …


Safe Passage, Tenzin Senge 2024 Kennesaw State University

Safe Passage, Tenzin Senge

Bachelor of Architecture Theses - 5th Year

After the Cultural Revolution of 1959 in China which led to the occupation of Tibet, the people of Tibet suffered the loss of homes and were stripped away from their socio-cultural ethos. As displaced Tibetans, the next generations will grow up without a nation, their self-identity and live with uncertain future. To this day, thousands of Tibetans are fleeing into neighboring countries every year by crossing the treacherous (cold freezing) Himalayas mountains with great hardship, even the most experience hikers find this task challenging. Issues arise for these refugees trying to escape, and questions tend to pile up about the …


Urban Mixed Income, Mixed Use Transit Orientated Design A Precast Prefabricated Modular Design Solution To Atlanta's Housing Affordability Crisis, Taharka Askia Muhammad 2024 Kennesaw State University

Urban Mixed Income, Mixed Use Transit Orientated Design A Precast Prefabricated Modular Design Solution To Atlanta's Housing Affordability Crisis, Taharka Askia Muhammad

Bachelor of Architecture Theses - 5th Year

This thesis will focus on urban housing affordability with an emphasis on quality mixed income, mixed use, transit orientated housing development (TOD). The primary goal is to provide an adequate number of affordable housing units to allow diversity and inclusion for residents of lower income in nearby communities or otherwise provide greater housing affordability overall. This research aims to propose new construction and creative innovations with precast, prefabricated modular architecture which will take advantage of cost offset strategies, lower cost of construction, efficiency, and speed of construction. The design phase of this thesis will develop a design proposal for the …


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