Civil and Environmental Engineering: المرسلات الحديثة
السجلات المعروضة 681 -- 700 من 851
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Use of 3D Images to Evaluate Formation Damage Induced by Montmorillonite Fines in Porous Media Systems
( Qatar Univesrity Press , 2020 , Conference Paper)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 ... -
Investigation of the Effect of the Force-Frequency on the Behaviour of a New Viscous Damper for Railway Applications
( Qatar Univesrity Press , 2020 , Conference Paper)The primary purpose of this work is to experimentally investigate the damping coefficient of a viscous damper, intended to be used in railway applications to reduce noise emission. The viscous shock absorber used in this ... -
Enhancement of Naphthalene Biodegradation by Sulfate Application in Brackish Subsurface Systems
( Qatar Univesrity Press , 2020 , Conference Paper)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 Paper)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 Paper)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 ... -
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 ... -
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 ... -
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 ... -
Effect of calcium nitrate healing microcapsules on concrete strength and air permeability
( ICE Publishing , 2019 , Article)This study investigates the compressive and flexural strengths, flexural modulus and air permeability of concrete samples containing 0.75% by cement weight of modified calcium nitrate self-healing microcapsules. The ... -
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 ... -
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 ... -
Vibrations Serviceability of a Medical Facility Floor for Sensitive Equipment Replacement: Evaluation with Sparse in Situ Data
( American Society of Civil Engineers (ASCE) , 2019 , Article)Vibrations serviceability of building floors has been a growing concern over the years. For steel-framed systems, vibrations serviceability checks often govern the structural design. When the floor is carrying vibration-sensitive ... -
Micro shear bands: Precursor for strain localization in sheared granular materials
( American Society of Civil Engineers (ASCE) , 2019 , Article)Recent studies have shown that detection of the onset and evolution of micro shear bands (MSBs) in granular materials can be improved using measurements of the kinematic behavior of particles. Different methods such as the ... -
Properties of fibre-reinforced concrete made with discarded materials
( ICE Publishing , 2019 , Article)This research paper investigates the physical, chemical and mechanical properties of steel slag aggregates (SSA), gravel aggregates (GLA), natural gabbro aggregates (NGA), and the different fresh and hardened properties ... -
Finite-Element Analysis of Cantilever Slab Deflections with ANSYS SOLID65 3D Reinforced-Concrete Element with Cracking and Crushing Capabilities
( American Society of Civil Engineers (ASCE) , 2019 , Article)This paper presents a finite-element (FE) study conducted to investigate the deflections of newly constructed cantilevered slabs built for a medical facility expansion. From the beginning of the construction stage, the ... -
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 ... -
The synthesis of data from instrumented structures and physics-based models via Gaussian processes
( Academic Press Inc. , 2019 , Article)At the heart of structural engineering research is the use of data obtained from physical structures such as bridges, viaducts and buildings. These data can represent how the structure responds to various stimuli over time ... -
Probabilistic Viscoelastic Continuum Damage Analysis of Fatigue Life of Warm-Mix Asphalt
( American Society of Civil Engineers (ASCE) , 2019 , Article)Fatigue damage is one of the major distress modes that have a critical impact on the performance and serviceability of asphalt pavements. High variability in testing results poses a challenge for predicting the fatigue ... -
A hybrid electro-coagulation/forward osmosis system for treatment of produced water
( Elsevier B.V. , 2019 , Article)Oil and gas exploration produce large volumes highly contaminated produced water (PW) which exhibits a major environmental challenge. This work investigates the application of a novel hybrid system by combining electro-coagulation ... -
Flexural behavior of basalt fiber-reinforced concrete slab strips reinforced with BFRP and GFRP bars
( Elsevier Ltd , 2019 , Article)This research investigates experimentally and analytically a novel one-way slab system reinforced with either basalt fiber-reinforced polymer (BFRP) or glass fiber-reinforced polymer (GFRP) longitudinal bars embedded in ...
