Civil and Environmental Engineering: Recent submissions
Now showing items 681-700 of 860
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Fully Softened and Residual Shear Strengths of Midra Shale
( Qatar Univesrity Press , 2020 , Conference)This paper presents a comparison of the fully softened shear strengths measured using the triaxial and torsional ring shear devices for a shale that possesses noticeably high plasticity and induration. The residual shear ... -
Use of 3D Images to Evaluate Formation Damage Induced by Montmorillonite Fines in Porous Media Systems
( Qatar Univesrity Press , 2020 , Conference)Formation damage costs oil and gas industry $140 billion/year in lost productivity, this is a key challenge to Qatar, the world's largest LNG exporter. During production from a well, multiphase flow foster drag forces to ... -
Enhancement of Naphthalene Biodegradation by Sulfate Application in Brackish Subsurface Systems
( Qatar Univesrity Press , 2020 , Conference)Anaerobic biodegradation is the most dominant mechanism in the petroleum hydrocarbon contaminated subsurface systems. Due to depletion of terminal electron acceptors such as sulfate, anaerobic degradation of organic ... -
Dynamic Imaging of Hydrate Specific Area Evolution during Xenon Hydrate Formation
( Qatar Univesrity Press , 2020 , Conference)Gas hydrates are ice-like structures formed under high pressure and low temperature conditions. They are considered as a potential energy source due to their abundance and the increase in energy demand worldwide. A fundamental ... -
Influence of Water Table Fluctuation on Natural Source Zone Depletion in Hydrocarbon Contaminated Subsurface Environments
( Qatar Univesrity Press , 2020 , Conference)Most of the prediction theories regarding dissolution of organic contaminants in the subsurface systems have been proposed based on the static water conditions and the influence of water fluctuations on mass removal requires ... -
Impact of Ionic Strength on Colloid Retention in a Porous Media: A Micromodel Study
( Qatar Univesrity Press , 2020 , Conference)Release of deposited colloids in the soil porous media during two-phase flow poses potential health hazard due to the facilitated transport of contaminants towards groundwater reservoirs. Considerable uncertainties exist ... -
Impact of Draw Solution Concentration on Forward Osmosis Process: A Simulation Study
( Qatar Univesrity Press , 2020 , Conference)In this study, a simulation model was used to evaluate the performance of forward osmosis process. A solution of low salinity was used as the feed solution in forward osmosis to dilute saline solution (i.e. draw solution) ... -
Treatment of Wastewater Using Reverse Osmosis for Irrigation Purposes
( Qatar Univesrity Press , 2020 , Conference)This work investigates the performance of reverse osmosis (RO) for the reclamation of treated sewage effluent (TSE) to be used as irrigation water for food crops. The feed water used in this study was a real sample of ... -
Practical Implementation of Contract Administration Performance Model in Qatar Construction Projects
( Qatar Univesrity Press , 2020 , Conference)Globally, the performance of Construction Contract Administration (CCA) is becoming of significant interest as the industry suffers from notable delays, cost overruns, and disputes as a consequence of poor contract ... -
Optimum Dispersion Parameters of Carbon Nanotubes: Concrete Strength by Response Surface Methodologies
( Qatar Univesrity Press , 2020 , Conference)"This paper implements Response Surface Methodologies (RSM) techniques to illustrate the maximum carbon nanotubes (CNTs)-concrete mechanical properties responses to the length, weight fraction and treatment variables. ... -
Comparison of the Mechanical Behavior of Railroad Ballast in a Box Test under Sinusoidal and Realistic Train Loadings Using Discrete Element Method
( Qatar Univesrity Press , 2020 , Conference)A ballasted track is a popular type of railway track and its use is increasing all over the world. A ballasted track consists of different structural elements like rails, fasteners, sleepers, ballast layer, sub-ballast ... -
Life Cycle Assessment for Fiber-Reinforced Polymer (FRP)nComposites Used in Concrete Beams: A State-of-the-Art Review
( Qatar Univesrity Press , 2020 , Conference)Fiber-reinforced polymer (FRP) composites have become popularly utilized in structural engineering applications. The common use of the FRP composites is related to their economic benefits that can be observed right away ... -
Steel Reinforced Grout for Strengthening of RC T-section Beams Deficient in Shear
( Qatar Univesrity Press , 2020 , Conference)numerous causes. Thus, proper strengthening and rehabilitation techniques are required to restore the strength and extend the service life of the structures. Steel reinforced grout (SRG) has recently been introduced as an ... -
Cantilever Beam Metastructure for Passive Broadband Vibration Suppression
( Qatar Univesrity Press , 2020 , Conference)This paper presents a beam structure of a new metamaterial-inspired dynamic vibration attenuation system. The proposed experimental research presents a designed cantilevered zigzag structure that can have natural frequency ... -
Hydration, Pore Solution, and Porosity of Cementitious Pastes Made with Seawater
( American Society of Civil Engineers (ASCE) , 2019 , Article)Unreinforced concrete or concrete reinforced with noncorrosive reinforcement could potentially be mixed with seawater in locations where potable water is scarce. A fundamental understanding of the properties of concrete ... -
Simulation-based deterioration patterns of water pipelines
( Taylor and Francis Ltd. , 2019 , Article)Water pipelines deteriorate overtime due to several distressing factors. To keep water pipelines in good condition, municipalities need to use reliable and credible deterioration models and inspection plans to better manage ... -
Impact of aeration rate and dielectrophoretic force on fouling suppression in submerged membrane bioreactors
( Elsevier B.V. , 2019 , Article)Membrane bioreactors (MBRs) present a unique opportunity in waste water treatment by combining the activated sludge process with membrane filtration. Although MBRs require less area, produce less volume of sludge and have ... -
Integration of innovation through analytical hierarchy process (Ahp) in project management and planning
( Vilnius Gediminas Technical University , 2019 , Article)This paper examines the concept of innovation management in the construction industry by studying the major components of the innovation process such as the major drivers of inno-vation, barriers and obstacles that prevent ... -
Unreinforced Masonry Facade Assessment of a Historic Building for Excessive Displacements Due to a Nearby Subway Construction
( American Society of Civil Engineers (ASCE) , 2019 , Article)There have been numerous publications on unreinforced masonry construction in the literature; however, there is a lack of publications on the condition assessment of existing unreinforced masonry facades for disturbances ... -
Multi-Objective Optimization Model for Inspection Scheduling of Sewer Pipelines
( American Society of Civil Engineers (ASCE) , 2019 , Article)Inspection activities play an important role in the operation and maintenance (O&M) strategy in municipalities. Efficient O&M strategies can help in making informed decisions based on the actual condition of pipelines ...
