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Articles 31 - 60 of 325
Full-Text Articles in Civil Engineering
Further Development Of Ultra-High-Performance Fiber Reinforced Concrete (Uhp-Frc): 3d Printing, Sifcon, Alternative Fibers, Shrinkage Crack Control, High Temperature, And Lightweight, Bhupendra Raj Acharya
Further Development Of Ultra-High-Performance Fiber Reinforced Concrete (Uhp-Frc): 3d Printing, Sifcon, Alternative Fibers, Shrinkage Crack Control, High Temperature, And Lightweight, Bhupendra Raj Acharya
Civil Engineering Theses - Archive
Introduction of artificial intelligence (AI) and machine learning in manufacturing industry also in every service industry, decreasing conventional skilled workforce and stagnated construction industry, probability and past statistics of the accident at the construction sites and difficulty in quality control has led the researchers to think of the solution and alternatives of the conventional construction. A new construction paradigm, known as 3-D concrete printing or additive manufacturing of concrete (AMC) provides such a solution. This research focuses on a preliminary study in 3d printed ultra-high-performance fiber-reinforced concrete (UHP-FRC) and, has developed a novel mix that has balanced extrude-ability and buildability. …
Vistas: Vocational Immersive Storytelling Training And Support Framework For Augmenting Work Performance, Sanika Doolani
Vistas: Vocational Immersive Storytelling Training And Support Framework For Augmenting Work Performance, Sanika Doolani
Civil Engineering Theses - Archive
Training and assessment of novice workers are the most vital part of any vocational industry. Innovations in science and technology have led to the creation of new industries and occupations, enhanced productivity and quality of work-life, and increased the potential for more people to participate in the workforce. However, these come at the risk and disadvantage of an increased cost of training and lack of proper training in industries, such as manufacturing. Recently, the use of Extended Reality (XR) systems has been on the rise to tackle various domains such as training, education, safety, etc. With the recent advances in …
Numerical Simulation Of Anchor Group Effects On Concrete Breakout Strength Within Steel Fiber Reinforced Concrete, Harjasdeep Singh Chauhan
Numerical Simulation Of Anchor Group Effects On Concrete Breakout Strength Within Steel Fiber Reinforced Concrete, Harjasdeep Singh Chauhan
Civil Engineering Theses - Archive
This study aims to investigate numerically, the effect of anchor groups on concrete breakout strength using nonlinear finite element analysis. Steel headed studs were cast in place within concrete of different amounts of steel fibers. Different proportions of steel fibers (0%, 0.5%, 1%, 1.5%) were utilized within steel fiber reinforced concrete (SFRC) for the numerical simulation. The physical properties of SFRC were modelled with respect to its composite compressive and tensile strength obtained from the experiments. The analysis was conducted on the concrete breakout strength of anchor bolts within SFRC. A good agreement was achieved between the numerical and the …
Effect Of Sludge Content On Different Types Of Food Waste Degradation In Anaerobic Digester, Mumtahina Binte Latif
Effect Of Sludge Content On Different Types Of Food Waste Degradation In Anaerobic Digester, Mumtahina Binte Latif
Civil Engineering Theses - Archive
Food waste (FW) is the second-largest component in landfills which impacts environments adversely by generating excessive leachate and greenhouse gas. Generally, conventional anaerobic digester and composting can be used for FW disposal. However, the former is highly expensive while the latter is energy inefficient. In contrast, household or community level underground anaerobic digester offers a cost-efficient solution as well as retrieves valuable energy from FW. The addition of nutrients such as sludge to organic waste especially FW accelerates the production of energy by limiting volatile fatty acid (VFA) accumulation. The objective of the current study is to find out the …
Characterization Of Msw And Plastic Waste Volume Estimation During Covid-19 Pandemic, Sehneela Sara Aurpa
Characterization Of Msw And Plastic Waste Volume Estimation During Covid-19 Pandemic, Sehneela Sara Aurpa
Civil Engineering Theses - Archive
COVID-19 has appeared and shook all aspects of our life. Starting from panic buying prior lockdown to the availability of vaccine, the whole world has gone through a pandemic situation which bounded people to live a life that never seemed normal before. Lockdown and risk of spreading disease forced people to stay at home and generate more waste, especially plastic waste. The effect on municipal solid waste characteristics due to this shift in the way of living is assessed in this study. In this study, municipal solid waste was collected from the working face of Irving Hunter Ferrell landfill. Waste …
Feasibility Assessment Of Production Of Liquid Organic Fertilizer (Lof) From Food Waste For Sustainable Waste Management, Shadman Sakib
Feasibility Assessment Of Production Of Liquid Organic Fertilizer (Lof) From Food Waste For Sustainable Waste Management, Shadman Sakib
Civil Engineering Theses - Archive
The increasing volume of food waste is responsible for the generation of potent greenhouse gases and is resulting in the wastage of valuable resources. In all regions of the world, the percentage of food waste in municipal solid waste is greater. Due to the lack of waste segregation at collection points and modern waste disposal methods in developing countries, organic waste is piling up in the dumpsites and landfills. Besides due to poor harvest and post-harvest procedures and inefficient supply chain, almost 55% of the cultivated crops do not even reach the consumers and get wasted. On the other hand, …
Pavement Temperature Response To Cold Fronts: A Model Column Study In A Freezer Box, Taryn Dilorenzo
Pavement Temperature Response To Cold Fronts: A Model Column Study In A Freezer Box, Taryn Dilorenzo
Civil Engineering Theses - Archive
The correlation of meteorological data and pavement conditions is crucial for winter pavement maintenance, this is the main reason that it is so important to understand in what ways pavement responds to cold fronts as well as when the formation of ice on a pavement surface can be expected. The pavement surface and its underlying subsurface layers combine to create a system with the behavior of the surface being influenced by both the air temperature above it, as well as the temperature and thermodynamic processes occurring in the sublayers below it. Both the pavement surface as well as the sublayers …
Flexural Strengthening Of Two-Way Slabs Using Cfrp External Laminates, Shams Abbas Naqvi
Flexural Strengthening Of Two-Way Slabs Using Cfrp External Laminates, Shams Abbas Naqvi
Civil Engineering Theses - Archive
Deterioration of reinforced concrete structures with time is a common phenomenon, which often leads to reduction in the load carrying capacity. To meet the coding requirements, strengthening of these structures is of utmost importance. Composite materials, such as Carbon Fiber Reinforced Polymers (CFRP), have shown effective results in external strengthening of these structures. However, premature delamination of CFRPs can decrease their efficiency. Recently, pre-saturated CFRP (PS-CFRP), a new type of CFRP pre-impregnated with epoxy resin, was introduced. Previous research has shown that PS-CFRP has shown improved results as compared to regular CFRP (R-CFRP) for strengthening beams and columns. However, no …
Laboratory Study Of Hydrodynamics Of Submerged Bridges, Max Thomson Dean
Laboratory Study Of Hydrodynamics Of Submerged Bridges, Max Thomson Dean
Civil Engineering Theses - Archive
Bridges are designed to withstand flood and debris loads; however, it is reported that 53% of bridge failures in the U.S. are caused by hydraulic events, including floods, scour, debris, and drifts. A series of scale flume experiments were conducted to determine flood force effects on bridge superstructures. 1:50 scale models of the Texas Department of Transportation’s typical reinforced concrete bridge superstructures were tested. The bridge superstructures included beams (TX28 and TX54 girders, slab beams, and box beams) and an accompanying bridge deck and railing. The drag and lift forces and overturning moments were measured by load sensors for various …
Developing Strength Reduction Factor For Flexural Design Of Reinforced Concrete Beams Exposed To Fire, Sahar Aradmehr
Developing Strength Reduction Factor For Flexural Design Of Reinforced Concrete Beams Exposed To Fire, Sahar Aradmehr
Civil Engineering Theses - Archive
Fire is a common hazard that may happen during the lifetime of concrete structures. Thus, it is one of the loads considered in building and tunnel design standards and codes. Dependency of the safety and structural integrity of a building to load-bearing elements such as beams requires the safe design of these elements. Flexural design of reinforced concrete (RC) beams under fire is critical. Typical load and resistance factor design (LRFD) of flexural member at ambient temperature deals with comparing the factored applied load with its capacity. Strength reduction factors are applied to the calculated nominal moment capacity to take …
Experimental Investigation Of Anchor Group Effects On Concrete Breakout Strength Within Fiber Reinforced Concrete, Atheer Alaa Al Khafaji
Experimental Investigation Of Anchor Group Effects On Concrete Breakout Strength Within Fiber Reinforced Concrete, Atheer Alaa Al Khafaji
Civil Engineering Theses - Archive
This research investigates the effect of anchor groups on concrete breakout strength within steel fiber reinforced concrete (SFRC) under tension load. High strength steel headed studs (F1554 Grade 105) in grouping action were cast-in-place within concrete specimens of different amounts of steel fibers. Four types of concrete mix designs were produced in the lab by using different amounts of steel fibers (0%, 0.5%, 1%, and 1.5%) by volume fraction of the mixture. The physical properties of steel fibers reinforced concrete were calculated through testing of specimens at the Civil Engineering Laboratory Building (CELB). In total, 12 cylinder specimens of 4-inch …
Hydrologic & Hydraulic Analyses To Re-Establish Trigg Branch’S Jurisdictional Channel To Pre-Dam Condition Using Hec-Hms & Hec-Ras Models, Razak Ahmed Albarqaawee
Hydrologic & Hydraulic Analyses To Re-Establish Trigg Branch’S Jurisdictional Channel To Pre-Dam Condition Using Hec-Hms & Hec-Ras Models, Razak Ahmed Albarqaawee
Civil Engineering Theses - Archive
Birds strikes are the most prevalent cause of airplanes strikes, and retention ponds near airports are one of the most attractive spots for both immigrant and domestic wildlife USDA (2017). Since the Trigg Lake, water surface area covers around 46 acres and is located approx. 1.5 miles from four main runways, which make the lake a perfect shelter for birds to build their nests and eventually strike departing and/or landing aircraft. Based on a Federal Aviation Administration (FAA) advisory circular, no retention pond should be constructed within five miles of an airport nor should it have standing storm runoff for …
Quantifying Shallow Depth Concrete Delaminations Using Impact Echo, Mantaka Mahjabin Momo
Quantifying Shallow Depth Concrete Delaminations Using Impact Echo, Mantaka Mahjabin Momo
Civil Engineering Theses - Archive
Delamination is a type of deterioration commonly found in concrete structures. It may form due to corrosion of embedded steel, poor construction, excessive vibration, or lack of bonding in composite construction. Impact echo (IE) is a simple and straightforward non-destructive testing (NDT) technique that is used to detect the presence and extent of delamination within concrete structures. It is capable of detecting its presence of delaminations in deep depths, but cannot accurately measure the defects that are near the surface. This phenomenon occurs due to the differences in the vibration modes of deep and shallow depth delaminations. The objective of …
Evaluation Of Long Term Durability In Concrete With External Pre-Saturated Cfrp Laminate, Ramya Anandhan
Evaluation Of Long Term Durability In Concrete With External Pre-Saturated Cfrp Laminate, Ramya Anandhan
Civil Engineering Theses - Archive
Many studies have investigated the use of carbon fiber reinforced polymer (CFRP) wraps to strengthen structural members, but there is limited literature on the application of presaturated CFRP wraps on reinforced concrete members. The main objective of this research is to study the long-term effectiveness of presaturated CFRP wraps in preventing corrosion of reinforced concrete specimens in severe environments. This paper presents numerical and experimental studies that were conducted to determine whether CFRP presaturated wraps provide a barrier against the ingress of chloride and permeability of water into concrete and thereby decelerate the corrosion process. The results show that the …
An Experimental Study Of Coupled Thermo-Hydro Behavior In Unsaturated Soil, Nice Kaneza
An Experimental Study Of Coupled Thermo-Hydro Behavior In Unsaturated Soil, Nice Kaneza
Civil Engineering Theses - Archive
Understanding unsaturated soils in response to the impact of temperature will better predict the performance of geo-structures that extract and inject underground heat. Previous studies have shown that heat and water in unsaturated soil affect the movement of each other and that thermal gradients are responsible for the migration of water and thermal properties. Therefore, it is essential to study the coupling behavior of thermal and hydraulic (TH) processes to analyze the distribution of moisture and thermal properties of unsaturated soil. These processes are transient and difficult to examine in the field. In addition, there is a lack of laboratory …
Experimental And 3d Finite Element Analyses Of Invert-Removed Circular Corrugated Metal Pipe Culverts Renewed With Polymer Spray-Applied Pipe Lining, Samrat Raut
Civil Engineering Theses - Archive
Corrugated metal pipes (CMPs) are one of the widely used culvert structures in the American highway system. Compared to other types of culverts, CMPs have shorter design life, and many CMP culverts have reached or exceeded their design life. Therefore, renewal or replacement of those CMPs is needed to ensure the safety and service of the highways. Since replacements of these culverts are costly, renewalis less costly and has been on the focus in this decade. Different rehabilitation methods have been proposed by different DOTs and the researchers from open-cut methods to trenchless technology. Since open-cut methods disturb the operation …
Flexural Load Capacity Of Heat-Treated Concrete Mixed With Recycled Glass Aggregate And Glass Pozzolan, Enrique Gonzalez Tapia
Flexural Load Capacity Of Heat-Treated Concrete Mixed With Recycled Glass Aggregate And Glass Pozzolan, Enrique Gonzalez Tapia
Civil Engineering Theses - Archive
This research focuses on determining the effects of adding glass aggregate and glass pozzolan to concrete that has been exposed to high temperatures. Previous work, based on finding the recommended proportions of recycled components for optimum results, was done to analyze the effects of adding recycled glass components to concrete. Based on those studies, a replacement ratio of 30% glass aggregates and 20% glass pozzolan was used in this project. The compressive strength of concrete has been extensively studied and has been shown to increase in strength when glass components are used in their correct proportions. Less research has been …
Experimental Study Of Flexural Behavior Of Preflex Sfrc-Encased Steel Joist Composite Beams, Niraj Narendra Bankatlal Bora
Experimental Study Of Flexural Behavior Of Preflex Sfrc-Encased Steel Joist Composite Beams, Niraj Narendra Bankatlal Bora
Civil Engineering Theses - Archive
This study investigates the behavior of encased steel composite beams in straight and preflex beams, constructed and tested at Civil Engineering Laboratory Building (CELB). Upwards camber is provided in the steel sections in steel angles and HSS tube in the composite beam encased in Steel fibers reinforced concrete (SFRC). Experimental procedure has been performed to study the flexural behavior of composite steel joists encased in SFRC. Compressive strength, tensile strength and modulus of rupture are computed. The physical properties of steel fiber reinforced concrete are calculated through testing at the UTA Civil Engineering Laboratory Building. Eighteen cylindrical (4”x8”) specimens, eighteen …
Numerical Investigation Of Concrete Breakout Strength Of Anchors In Shear Within Fiber Reinforced Concrete, Yash Hitendrakumar Patel
Numerical Investigation Of Concrete Breakout Strength Of Anchors In Shear Within Fiber Reinforced Concrete, Yash Hitendrakumar Patel
Civil Engineering Theses - Archive
This study investigates the numerical analysis of concrete breakout strength of cast in place anchors in shear within synthetic fiber reinforced concrete (SYN-FRC). A three dimensional, full-scale model was developed using the ABAQUS 6.14 software. The 3D solid elements with consideration of material nonlinearities were chosen to stimulate the SYN-FRC beam anchorage. The numerical analysis was conducted with a fixed loading rate of 300lb per step to obtain the behavior of fiber-reinforced concrete breakout with design-mix compressive strength of 4,000 psi and fiber volume fraction of 0%, 0.5%, 1.0%, and 1.5%. An inverse analysis was used to calibrate the material …
Experimental And Numerical Study Of Steel Fiber Reinforced Concrete Structures Subjected To Internal Explosion, Nikhil Vasant Moon
Experimental And Numerical Study Of Steel Fiber Reinforced Concrete Structures Subjected To Internal Explosion, Nikhil Vasant Moon
Civil Engineering Theses - Archive
This research investigates the effect of an accidental explosion of a steam boiler in a boiler room on steel fiber reinforced concrete (SFRC) structure in an industrial facility, using nonlinear analysis in ABAQUS FEA software. The mechanical properties of SFRC are calculated through testing at the UTA Civil Engineering Laboratory Building. Steel fiber dosages in concrete at different volume fractions are examined for the mechanical properties of concrete. In total, 9 (4” x 8”) cylindrical specimens for compressive strength and modulus of elasticity test, 9 (4” x 8”) cylindrical specimens for tensile strength test, and 9 (6” x 6” x …
Examining Current State Of Practice Of Enhancing Visibility Of Winter Operations Vehicles, Wasiq Ameen
Examining Current State Of Practice Of Enhancing Visibility Of Winter Operations Vehicles, Wasiq Ameen
Civil Engineering Theses - Archive
Despite precautions taken by the operators of maintenance vehicles, insufficient visibility of winter operations vehicles cause many collisions in the United States. Numerous methods have been developed to enhance the visibility of winter operations vehicles. Although the visibility of winter operations vehicles has enhanced through these methods, the consistency in the implementation of the methods for enhancing their visibility is critical to avoid collisions. The inconsistencies in the implementation of the methods confuse the public who are traveling in winter conditions when visibility is low. The confusion leads to a delay in perception time and response time of the drivers …
Impacts Of Construction Material Delay In Iraq, Omar Raad Abdullah
Impacts Of Construction Material Delay In Iraq, Omar Raad Abdullah
Civil Engineering Theses - Archive
The construction industry is considered one of the most important industries in Iraq. It is well known that most construction projects in this country can experience missed deadlines and cost overruns or both. The main objectives of this study are to evaluate the impact of construction material shortages and to determine the most important problems causing these shortages in Iraq. Above objectives are achieved through a literature review and a survey, which include a questionnaire used to assess the perceptions of the main participants involved in the construction of different types of projects, such as infrastructure, residential, highways and medical …
Experimental Investigation Of Utilizing Steel Fiber As Concrete Reinforcement In Bridge Decks, Samed Al Khafaji
Experimental Investigation Of Utilizing Steel Fiber As Concrete Reinforcement In Bridge Decks, Samed Al Khafaji
Civil Engineering Theses - Archive
Research on utilizing steel fiber vs concrete reinforcement in bridge deck to replace more traditional reinforcing bars is sparse, therefore a research into this topic is interesting to identity opportunities for speeding up of construction by avoiding laying and tying reinforcement and verifying clear cover to reinforcing bars which is one of the most time-consuming processes involved in construction. This study investigates the efforts of steel fiber on the bridge deck from the strength and economical implementation. Four concrete mix design with vary steel fiber dosages of 0.0%, 0.5%, 1.0%, and 1.5% used in this study. The physical properties of …
Effect Of Sewage Sludge And Wastewater Recirculation On The Degradation Of Municipal Solid Waste In Bioreactors, Afroza Ayub
Effect Of Sewage Sludge And Wastewater Recirculation On The Degradation Of Municipal Solid Waste In Bioreactors, Afroza Ayub
Civil Engineering Theses - Archive
Municipal Solid Waste (MSW) management is the major environmental and economical concern for the world. Among all the MSW management alternatives, sustainable Bioreactor has potential to solve environmental and economic concerns related to organic waste. This potential of Sustainable Bioreactor can be enhanced by accelerated decomposition of waste. Accelerated decomposition of organic fraction of MSW can be achieved by the addition of nitrogen rich, macro and micro nutrients such as sludge and manures. Several studies have been conducted by using sludge as inoculum for degrading organic fraction of MSW in the anaerobic digester. However, this study is to compare the …
Physical Characterization And Evaluation Of Energy Potential For Mined Waste From Irving Landfill, Vijay Kakara
Physical Characterization And Evaluation Of Energy Potential For Mined Waste From Irving Landfill, Vijay Kakara
Civil Engineering Theses - Archive
Historically landfills have been seen as the ultimate solution for storing waste at minimum cost. But, now it is a well-known fact that these deposits have numerous implications such as long term methane emissions, local pollution and many space-related issues etc. In most parts of the world, however, landfilling is the most common method to dispose waste. Even developed countries with recycling and waste treatment facilities have been no exception in landfilling. Therefore over the years, several old and operating landfills have been accumulated with an enormous amount of obsolete materials and products. To address such issues related to waste …
Driveability Of Recycled Plastic Pin (Rpp) In North Texas, Arif Mohammad Aziz
Driveability Of Recycled Plastic Pin (Rpp) In North Texas, Arif Mohammad Aziz
Civil Engineering Theses - Archive
The Recycled Plastic Pins (RPP) have been extensively used as an alternative to the conventional slope stabilization methods in stabilizing shallows slope failure in Texas, Missouri, Kansas, and Idaho in the United States. The RPP provides additional resistance along the potential slip surface when it is driven into the slope and increases the factor of safety. RPPs are fabricated from recycled plastics and waste materials (i.e. polymers, sawdust, and fly ash), and is nondegradable in nature. It is found to be very useful and beneficial engineering materials for civil engineering infrastructure projects. The cost-effectiveness of using any engineering material largely …
Effect Of Chicken Manure On Methane Production From Msw In Lab Scale Anaerobic Reactors, Md Tauhidul Islam
Effect Of Chicken Manure On Methane Production From Msw In Lab Scale Anaerobic Reactors, Md Tauhidul Islam
Civil Engineering Theses - Archive
One of the major problems of urbanization is the production of a huge amount of Municipal Solid Waste. The cities and metropolitan areas are generating more and more solid waste and these wastes are filling up the landfill rapidly. Creating new landfills after a few years is not a solution as there is not much space in urban areas. Moreover, making the landfills far away from cities is not economically viable as longer hauling distance increases the cost. In this scenario, Bioreactor landfill is a viable solution to this problem. Bioreactor landfills can save a lot of space and it …
Laboratory Testing And Finite Element Modeling Of Invert Removed Corrugated Metal Culvert Buried Under Shallow Cover, Hiramani Raj Chimauriya
Laboratory Testing And Finite Element Modeling Of Invert Removed Corrugated Metal Culvert Buried Under Shallow Cover, Hiramani Raj Chimauriya
Civil Engineering Theses - Archive
Ever since their advent in the 1800s, corrugated metal pipes (CMPs) have played a vital role in this nation’s infrastructure. The wide range of options on diameter and span have made these culverts more preferable over traditional concrete culverts. However, compared to concrete culverts, CMPs have a shorter design life and are only expected to last 10 to 30 years even under ideal conditions. Over the course of years, different open-cut and trenchless methods have been used to rehabilitate existing old and damaged culverts. In recent years, trenchless methods like sliplining, CIPP, spray-applied pipe linings, etc. have been gaining popularity …
Remaining Service Life Estimation And Probabilistic Analysis Of Reinforced Concrete Sewer Pipeline Systems, Pardis Moamaei
Remaining Service Life Estimation And Probabilistic Analysis Of Reinforced Concrete Sewer Pipeline Systems, Pardis Moamaei
Civil Engineering Theses - Archive
The serviceability and structural performance of reinforced concrete pipes could deteriorate for many reasons. The loss in structural capacity and other structural operations may drastically affect the surrounding environment, public health and the economy. This research is directed towards the estimation of remaining service life, and to evaluate the level of risk of failure of reinforced concrete sewer pipes (RCSP) that are subjected to continuing corrosion due to sulfide attack that in turn leads to loss of pipe thickness caused by excessive deterioration along the pipe’s interior wall. In order to estimate the remaining service life, reliability theory is used …
Analytical And Numerical Modeling Of Externally Heated Geothermal Bridge Deck, Mandakini Chowdhury
Analytical And Numerical Modeling Of Externally Heated Geothermal Bridge Deck, Mandakini Chowdhury
Civil Engineering Theses - Archive
Bridge icing is a severe safety concern for travel during winter months in the United States. Ice on bridges form quicker than roads, as the bridge is exposed to wind on all its surfaces. The underlying problem of bridge icing is loss of friction between the vehicle wheel and the pavement surface due to slippery nature of ice. Hence, the solution is to increase the friction between the above-mentioned surfaces. The most commonly adopted solution is application of sand, salt or other granular materials on the roadway. However, due to corrosive nature of the salts, the durability of the infrastructure …