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Articles 601 - 630 of 2169
Full-Text Articles in Architecture
The Integration Of Virtual Reality In The Commercial Construction Industry, Justin T. Gin
The Integration Of Virtual Reality In The Commercial Construction Industry, Justin T. Gin
Construction Management
Virtual reality has recently been spreading throughout the commercial construction industry rapidly. Some of its capabilities are safety training, helping spot Americans with Disabilities Act (ADA) issues, logistics planning, and virtual walkthroughs. Many construction companies were starting to utilize virtual reality's advantages until COVID-19 hit. The initial wave of COVID slowed down construction in general as well as the need or use of virtual reality. Now, some companies are worried about the health risks and implementation issues that virtual reality headsets might bring while other companies are optimistic about the future of virtual reality. This report will explore the different …
Proposal For Adobe Earthbag Disaster-Relief Structure, John Camacho
Proposal For Adobe Earthbag Disaster-Relief Structure, John Camacho
Construction Management
The science behind creating an adobe house has been around for thousands of years; the primitive mixture contains only dirt, water, and straw. Left to cure in bricks or as a single cast-in-place system, the structure will provide long-lasting protection from the elements. Science has taken this a step further with the introduction of cementitious admixtures and reinforcement. The result is an adobe structure with exemplary thermo-retentive properties and load-bearing capabilities. This project provides an analysis on the “SuperAdobe” earthbag system that has been put into practice by independent contractors and housing-relief initiatives. The goal of the project was to …
Design, Dynamic Performance And Ecological Efficiency Of Fiber-Reinforced Mortars With Different Binder Systems: Ordinary Portland Cement, Limestone Calcined Clay Cement And Alkali-Activated Slag, Wu Jian Long, Zhuorui Wu, Kamal Khayat, Jingjie Wei, Biqin Dong, Feng Xing, Jinrui Zhang
Design, Dynamic Performance And Ecological Efficiency Of Fiber-Reinforced Mortars With Different Binder Systems: Ordinary Portland Cement, Limestone Calcined Clay Cement And Alkali-Activated Slag, Wu Jian Long, Zhuorui Wu, Kamal Khayat, Jingjie Wei, Biqin Dong, Feng Xing, Jinrui Zhang
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The dynamic mechanical properties and ecological efficiency of cement-based composites are of vital importance to the development of green building materials and dynamic loadings resistance. In this study, the dynamic mechanical properties, ecological and economic efficiency of fiber-reinforced mortars (FRMs) made with different binder systems, including ordinary Portland cement (OPC), limestone calcined clay cement (LC3), and alkali-activated slag (AAS), were compared. In addition, different rheological parameters were designed to evaluate the dynamic mechanical properties of FRMs. The fiber pull-out testing, Barrett-Joyner-Halenda (BJH) testing, and scanning electron microscope (SEM) were used to reveal the difference in the dynamic mechanical properties of …
Dynamical Properties Of Environmental High-Performance Composites With Calcined Clay, Jingjie Wei, Wu Jian Long, Kamal Khayat, Biqin Dong, Liu Mei, Feng Xing
Dynamical Properties Of Environmental High-Performance Composites With Calcined Clay, Jingjie Wei, Wu Jian Long, Kamal Khayat, Biqin Dong, Liu Mei, Feng Xing
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Concrete structures may be exposed to dynamic loadings within short periods such as earthquakes and vehicles load, resulting in substantial damage to human life and property because of the collapse of concrete structures. The research achievements on dynamic properties of high-performance composites with LC3 (HPC-LC3) are limited, although dynamic loadings are commonly encountered in infrastructure. The study aims to develop a new-green concrete product (HPC-LC3) with high dynamical properties and promote its mass use in a vibration service environment by investigating dynamical properties of HPC-LC3. Dynamical properties of structure can be promoted at material level by means of enhancing the …
Water Film Depth Prediction Model For Highly Textured Pavement Surface Drainage, Alireza Pourhassan, Ahmed A. Gheni, Mohamed Elgawady
Water Film Depth Prediction Model For Highly Textured Pavement Surface Drainage, Alireza Pourhassan, Ahmed A. Gheni, Mohamed Elgawady
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Water film depth (WFD) is an important factor for road traffic safety because of its direct connection with skid resistance, hydroplaning speed, and the tendency of splash and spray. Increasing the pavement macrotexture reduces WFD. However, existing models for WFD prediction have not been developed on highly textured surfaces such as chip seal. Furthermore, the rainfall intensities used for developing most of these models were relatively low, leaving no or low WFD on chip seal surfaces. To propose a WFD prediction model suitable for highly textured surfaces and to consider the effect of surface material type, an experimental study was …
Setting Times Of Early-Age Mortars Determined From Evolution Curves Of Poisson’S Ratio, Bate Bate, Xiao Chen, Chao Chen, Hongyan Ma, Jianfeng Zhu, Junnan Cao, Jiakai Chen, Kamal Khayat, Shuai Zhang
Setting Times Of Early-Age Mortars Determined From Evolution Curves Of Poisson’S Ratio, Bate Bate, Xiao Chen, Chao Chen, Hongyan Ma, Jianfeng Zhu, Junnan Cao, Jiakai Chen, Kamal Khayat, Shuai Zhang
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Setting times, as the early-age properties of cement-based materials, are important properties to ensure the quality and long-term performance of engineering structures. To determine the initial and final setting times of cementitious materials, the compressive wave velocity and shear wave velocity of six early-age mortar samples were monitored. Their time evolution curves of Young's modulus, shear modulus, bulk modulus, and Poisson's ratio were then calculated and analyzed. The signature times of the derivatives of the Poisson's ratio evolution curves correlate well with the initial and final setting times, and the remarkably high coefficient of determination values relative to the data …
Novel Tri-Viscous Model To Simulate Pumping Of Flowable Concrete Through Characterization Of Lubrication Layer And Plug Zones, Tooran Tavangar, Masoud Hosseinpoor, Ammar Yahia, Kamal Khayat
Novel Tri-Viscous Model To Simulate Pumping Of Flowable Concrete Through Characterization Of Lubrication Layer And Plug Zones, Tooran Tavangar, Masoud Hosseinpoor, Ammar Yahia, Kamal Khayat
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In this study, computational fluid dynamics (CFD) was employed to simulate the pipe flow of 18 self-consolidating and four highly workable concrete mixtures in a 30-m long pumping circuit. Pressure loss (ΔP) in 100- and 125-mm diameter (DP) pipelines was measured under low (1.2–6.2 l/s) and high (8.1–16.4 l/s) flow rates (Q). The numerical simulation was successfully carried out using a two-fluid model and a new variable-viscosity single-fluid approach, namely double-Bingham and tri-viscous models, respectively. The radial variation of rheological properties of the concrete across the pipe section, representing the plug flow, sheared concrete, and lubrication layer (LL) zones was …
Viscosity Modifying Agents: Key Components Of Advanced Cement-Based Materials With Adapted Rheology, Hela Bessaies-Bey, Kamal Khayat, Marta Palacios, Wolfram Schmidt, Nicolas Roussel
Viscosity Modifying Agents: Key Components Of Advanced Cement-Based Materials With Adapted Rheology, Hela Bessaies-Bey, Kamal Khayat, Marta Palacios, Wolfram Schmidt, Nicolas Roussel
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Viscosity modifying agents (VMAs) are essential ingredients for the production of flowable cement-based materials. This paper presents an overview of commonly used VMAs and attempts to shed some light on the underlying physics at the origin of their mechanisms of action. The main molecular parameters of VMA controlling the rheological properties of the cement pore solution are highlighted. As the mechanisms of action of VMAs in cement-based materials are closely related to their affinity with the surface of cement particles, the adsorption of the main VMA types is discussed. The effect of VMAs on flow properties and stability of cement-based …
Developing Mix Proportions For Class C Fly Ash-Based Alkali-Activated 3d-Printed Concrete Mixtures, Fareh Abudawaba, Eslam Gomaa, Ahmed Gheni, Mohamed Elgawady
Developing Mix Proportions For Class C Fly Ash-Based Alkali-Activated 3d-Printed Concrete Mixtures, Fareh Abudawaba, Eslam Gomaa, Ahmed Gheni, Mohamed Elgawady
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
This study investigated the use of class C fly ash (FA) as a precursor for alkali-activated mortar (AAM) for 3D-printed concrete (3DPC). AAMs with different water-to-FA (W/FA), alkaline activator-to-FA (Alk/FA), and sodium silicate-to-sodium hydroxide (SS/SH) ratios were examined to develop mixtures that can be tailored for different structural applications of 3DPC. The fresh properties, including extrudability and buildability, were evaluated through the open time (OT) and immediate deformation tests, respectively. Different cycle times (CTs) were applied to achieve a strain limit state necessary to maintain the printed shape. The strength of AAMs in different directions at different CTs was examined. …
Management Of Change Orders In Infrastructure Transportation Projects, Rayan H. Assaad, Muaz O. Ahmed, Islam H. El-Adaway, Pramen P. Shrestha
Management Of Change Orders In Infrastructure Transportation Projects, Rayan H. Assaad, Muaz O. Ahmed, Islam H. El-Adaway, Pramen P. Shrestha
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The Illinois Department of Transportation (IDOT) will handle many upcoming projects due to the recent statewide infrastructure strategic plan and the fast-track efforts affecting many infrastructure projects amid COVID-19. Nevertheless, many change orders are anticipated to occur on IDOT's projects. Thus, this paper examines the proper contractual management of changes within IDOT infrastructure transportation projects by following a research method based on the integration between a desktop analysis and a focus group analysis. The desktop analysis involved collecting information and data from existing resources, case studies, and documents related to change orders. The focus group analysis involved consulting with change …
A Global Survey Of Infection Control And Mitigation Measures For Combating The Transmission Of Covid-19 Pandemic In Buildings Under Facilities Management Services, Hadi Sarvari, Zhen Chen, Daniel W. M. Chan, Ellyn A. Lester, Nordin Yahaya, Hala Nassereddine, Aynaz Lotfata
A Global Survey Of Infection Control And Mitigation Measures For Combating The Transmission Of Covid-19 Pandemic In Buildings Under Facilities Management Services, Hadi Sarvari, Zhen Chen, Daniel W. M. Chan, Ellyn A. Lester, Nordin Yahaya, Hala Nassereddine, Aynaz Lotfata
Civil Engineering Faculty Publications
Facilities management along with health care are two important aspects in controlling the spread of infectious diseases with regard to controlling the outbreak of global COVID-19 pandemic. Hence, with the increasing outbreak of COVID-19 pandemic, the importance of examining the relationship between the built environment and the outbreak of infectious diseases has become more significant. The aim of the research described in this article is to develop effective infection control and mitigation measures to prevent the transmission of COVID-19 pandemic in the built environment. This study seeks to answer the question of how the facilities management industry can help reduce …
Examining The Effect Of A Chitosan Biopolymer On Alkali-Activated Inorganic Material For Aqueous Pb(Ii) And Zn(Ii) Sorption, Sukanta K. Mondal, Chenglin Wu, Felix C. Nwadire, Ali A. Rownaghi, Aditya Kumar, Yusuf Adewuyi, Monday Uchenna Okoronkwo
Examining The Effect Of A Chitosan Biopolymer On Alkali-Activated Inorganic Material For Aqueous Pb(Ii) And Zn(Ii) Sorption, Sukanta K. Mondal, Chenglin Wu, Felix C. Nwadire, Ali A. Rownaghi, Aditya Kumar, Yusuf Adewuyi, Monday Uchenna Okoronkwo
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Biopolymers and alkali-activated materials have attracted a great deal of attention as adsorbents for the removal of heavy metal contaminants from aqueous solutions. Both materials are sustainable and feature unique properties, but biopolymers are relatively more expensive or difficult to prepare and exhibit low mechanical and surface properties, a narrow pH range, and thermal stability. In this study, hybrid adsorbents were prepared from both types of material, by alkali activation of low-cost fly ash precursors accompanied by incorporation of 0-2%mass chitosan biopolymer. Two types of alkaline activating solutions, NaOH and Na2SiO3, were employed to generate two sets of hybrid adsorbents …
Strategic Energy Master Planning For Carbon Neutrality, Marie Patterson
Strategic Energy Master Planning For Carbon Neutrality, Marie Patterson
CSU Journal of Sustainability and Climate Change
Universities across the United States are generating goals to be more sustainable and carbon neutral. The energy used in existing buildings on campuses amount to a large volume of greenhouse emissions and must be reduced to help achieve neutrality goals. Strategic Energy Master Plans are instrumental to support these goals through the development of recommendations to reduce energy. Calculating the energy use intensity for existing buildings, a main component of a Strategic Energy Master Plan, can help the campus understand where energy is being used the most. With this information the highest energy consuming buildings can be the focus of …
Molecular Insight Into The Fluidity Of Cement Pastes: Nano-Boundary Lubrication Of Cementitious Materials, Muhan Wang, Kaixuan Zhang, Xiang Ji, Pan Wang, Hongyan Ma, Jun Zhang, Dongshuai Hou
Molecular Insight Into The Fluidity Of Cement Pastes: Nano-Boundary Lubrication Of Cementitious Materials, Muhan Wang, Kaixuan Zhang, Xiang Ji, Pan Wang, Hongyan Ma, Jun Zhang, Dongshuai Hou
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The workability mechanism of fresh concrete at the molecular level remains essentially unexplored. To understand the molecular origin for cement fluidity, molecular dynamics and Density Function Theory (DFT) were utilized to construct a shear model of Calcium-Silicate-Hydrate (C-S-H) layers. The structure, dynamics, and reactivity of ultra-confined pore solution between C-S-H gels are systematically investigated. Under shear loading, periodic oscillation of friction force is observed as the typically Couette flow and the interfacial friction force is reduced from 35.2 Kcal/mol·Å to 3.3 Kcal/mol·Å with water content increasing. All of the systems contain breakage of noncovalent bonds of water-Ca and water-water in …
Effect Of Type And Content Of Expansive Agent On Performance Of Fiber-Reinforced Concrete With Adapted Rheology, Ahmed Abdelrazik, Kamal Khayat
Effect Of Type And Content Of Expansive Agent On Performance Of Fiber-Reinforced Concrete With Adapted Rheology, Ahmed Abdelrazik, Kamal Khayat
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
A performance-based mixture design approach was utilized to optimize the binder content and composition for fiber-reinforced super workable concrete (FR-SWC) and fiber-reinforced self-consolidating concrete (FR-SCC). The test parameters included the replacement ratio of the cement by a Class C fly ash (FA), type and content of expansive agent (EA), and total binder content. Hooked-end steel fibers measuring 30 mm in length were used at 0.5% by volume. The investigated concrete was tested for slump flow, modified J-ring, sieve stability, bleeding, visual stability index, air content, unit weight, as well as compressive and splitting tensile strengths. The elastic modulus, autogenous, drying …
Module 01: Introduction To Architectural Cad, Keith Johnson, Mohammad Moin Uddin
Module 01: Introduction To Architectural Cad, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 05: Plumbing Plans, Keith Johnson, Mohammad Moin Uddin
Module 05: Plumbing Plans, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 03a: Floor Plan Intro, Keith Johnson, Mohammad Moin Uddin
Module 03a: Floor Plan Intro, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 07: Wall Sections, Keith Johnson, Mohammad Moin Uddin
Module 07: Wall Sections, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 03b: Detail Floor Plan Layout, Keith Johnson, Mohammad Moin Uddin
Module 03b: Detail Floor Plan Layout, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 04: Electrical Plans, Keith Johnson, Mohammad Moin Uddin
Module 04: Electrical Plans, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 08: Roof Plans, Keith Johnson, Mohammad Moin Uddin
Module 08: Roof Plans, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 09: Site Plan, Keith Johnson, Mohammad Moin Uddin
Module 09: Site Plan, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 02: Residential Design, Keith Johnson, Mohammad Moin Uddin
Module 02: Residential Design, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Module 03c: Dimensioning, Keith Johnson, Mohammad Moin Uddin
Module 03c: Dimensioning, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
A Systematic Literature Review Exploring The Barriers To Innovative Modular Construction Methods For The International Hyper-Scale Data Centre Sector, Peter E. Lonergan, A.Omar Portillo-Dominguez
A Systematic Literature Review Exploring The Barriers To Innovative Modular Construction Methods For The International Hyper-Scale Data Centre Sector, Peter E. Lonergan, A.Omar Portillo-Dominguez
Other
Data centres form the essential global infrastructure relied upon for multiple industries such as the internet, financial services, and telecommunications. Consequently, data centre construction has developed into a buoyant business sector, leveraging increasing global investment. However, traditional means of data centre procurement do not match stakeholder’s ambitions or current delivery demands. Thus, there is a need for the adoption of new and innovative construction methodologies in the sector to introduce improvements for the delivery of this essential infrastructure. As a step in that direction, this paper presents a Systematic Literature Review (SLR) that investigates the barriers preventing the implementation of …
Resonance Analysis Between Deck And Cables In Cable-Stayed Bridges With Coupling Effect Of Adjacent Cables Considered, Houjun Kang, Yunpeng Cai, Yunyue Cong, Xiaoyang Su, Guirong Grace Yan
Resonance Analysis Between Deck And Cables In Cable-Stayed Bridges With Coupling Effect Of Adjacent Cables Considered, Houjun Kang, Yunpeng Cai, Yunyue Cong, Xiaoyang Su, Guirong Grace Yan
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The nonlinear dynamic model of a shallow arch with multiple cables is developed to model a long-span cable-stayed bridge. Based on the veering phenomenon of cable-stayed bridges, the in-plane modal internal resonance between the first mode of the shallow arch and the first mode of the cable is investigated under both primary resonance and subharmonic resonance. Modulation equations of the dynamic system are obtained by Galerkin discretization and the multiple scales method, in which the equilibrium solution of modulation equations is obtained by the Newton–Raphson method. Meanwhile, the Runge–Kutta method is applied to directly solve the ordinary differential equations to …
Accessing 3d Data, Francesca Albrezzi, John Bonnett, Tassie Gniady, Heather Richards-Rissetto, Lisa Snyder
Accessing 3d Data, Francesca Albrezzi, John Bonnett, Tassie Gniady, Heather Richards-Rissetto, Lisa Snyder
Department of Anthropology: Faculty Publications
The issue of access and discoverability is not simply a matter of permissions and availability. To identify, locate, retrieve, and reuse 3D materials requires consideration of a multiplicity of content types, as well as community and financial investment to resolve challenges related to usability, interoperability, sustainability, and equity. This chapter will cover modes, audiences, assets and decision points, technology requirements, and limitations impacting access, as well as providing recommendations for next steps.
Module 06: Hvac, Keith Johnson, Mohammad Moin Uddin
Module 06: Hvac, Keith Johnson, Mohammad Moin Uddin
ENTC 2160: Architectural CAD
No abstract provided.
Indoor Air Quality Through The Lens Of Outdoor Atmospheric Chemistry, Jonathan P.D. Abbatt, Douglas B. Collins
Indoor Air Quality Through The Lens Of Outdoor Atmospheric Chemistry, Jonathan P.D. Abbatt, Douglas B. Collins
Faculty Contributions to Books
Outdoor atmospheric chemistry and air quality have been the topic of research that intensified in earnest around the mid-20th century, while indoor air quality research has only been a key focus of chemical researchers over the last 30 years. Examining practices and approaches employed in the outdoor atmospheric chemistry research enterprise provides an additional viewpoint from which we can chart new paths to increase scientific understanding of indoor chemistry. This chapter explores our understanding of primary chemical sources, homogeneous and multiphase reactivity, gas-surface partitioning, and the coupling between the chemistry and dynamics of indoor air through the lens of …