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Investigation Of Microstructure Of Cementitious Materials Exposed To High Temperature By Non-Destructive Integrated Ct-Xrd Method, Takuya Mikami, H Takahashi, T Sugiyama
Investigation Of Microstructure Of Cementitious Materials Exposed To High Temperature By Non-Destructive Integrated Ct-Xrd Method, Takuya Mikami, H Takahashi, T Sugiyama
International Conference on Durability of Concrete Structures
Severe accident occurred in 2011 at the Fukushima Daiichi nuclear power plant and it can be assumed that the concrete building was exposed to high temperatures environment for a long time due to loss of the cooling function of the nuclear reactor. In order to prepare for the best scenario in the decommission plan, it should be first needed to clarify and evaluate the level of damage and deterioration of the contaminated concrete. To solve this problem, experiments were conducted for cementitious materials with the maximum temperature of 400 or 1000 degrees Celsius with durations of up to 2 hours. …
To Analysis Of The Stressed Condition And Long Durability Of Cylindrical And Conic Pipes Of Polymeric Materials, A. Abdusattarov, F.E. Abduqodirov, D.N. Shamsiyev
To Analysis Of The Stressed Condition And Long Durability Of Cylindrical And Conic Pipes Of Polymeric Materials, A. Abdusattarov, F.E. Abduqodirov, D.N. Shamsiyev
Journal of Tashkent Institute of Railway Engineers
The article considers the solution of the problem of long-term strength and damage of a conical pipe and a hollow cylinder bonded to a thin-walled shell under the action of internal pressure, taking into account the influence of visco-elastic properties of the material on the stress-strain state
Evaluation Of Internally Cured Bridge Deck Concrete With Standard And Optimized Aggregate Gradation, Arman Abdigaliyev
Evaluation Of Internally Cured Bridge Deck Concrete With Standard And Optimized Aggregate Gradation, Arman Abdigaliyev
Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research
Due to the relatively high cement content and low water-to-cement ratio (w/c) used, bridge deck concrete is prone to premature cracking. Internal curing has been found to greatly reduce the chance of premature cracking as well as concrete deterioration. This research developed internally cured bridge deck concrete based on a local mix design in Nebraska. Four different lightweight fine aggregate (LWFA) as internal curing agents were evaluated and their effects on fresh, mechanical, durability, and shrinkage properties of concrete were studied. The study focused on resolving two issues associated with fine aggregate replacement based on Bentz equation. To identify the …
Validation Of The State Based Peridynamic Lattice Model, Anima Bista
Validation Of The State Based Peridynamic Lattice Model, Anima Bista
Civil Engineering ETDs
This thesis presents a study performed to validate the State-based Peridynamic Lattice Model (SPLM) using results obtained from laboratory experiments. The SPLM is capable of modeling cracking of solids using particle lattices. We use a plane stress, elastic-plastic damage SPLM model for the simulations. The SPLM model is appropriate for computational simulations of cementitious materials as it automatically allows cracks to develop. In this study, the lattices are rotated through different angles and the variations of the cracking patterns are studied. In the laboratory, we performed nine Brazilian split cylinder tests, three anchor pullout/direct tensile tests, and eight compression tests …
Concrete Crack Detection And Monitoring Using A Capacitive Dense Sensor Array, Jin Yan, Austin Downey, Alessandro Cancelli, Simon Laflamme, An Chen, Jian Li, Filippo Ubertini
Concrete Crack Detection And Monitoring Using A Capacitive Dense Sensor Array, Jin Yan, Austin Downey, Alessandro Cancelli, Simon Laflamme, An Chen, Jian Li, Filippo Ubertini
Faculty Publications
Cracks in concrete structures can be indicators of important damage and may significantly affect durability. Their timely identification can be used to ensure structural safety and guide on-time maintenance operations. Structural health monitoring solutions, such as strain gauges and fiber optics systems, have been proposed for the automatic monitoring of such cracks. However, these solutions become economically difficult to deploy when the surface under investigation is very large. This paper proposes to leverage a novel sensing skin for monitoring cracks in concrete structures. This sensing skin is constituted of a flexible electronic termed soft elastomeric capacitor, which detects a change …
The War On Drugs And The Case For Rehabilitation, Christopher Johnson, Jackson Hoopes
The War On Drugs And The Case For Rehabilitation, Christopher Johnson, Jackson Hoopes
Brigham Young University Prelaw Review
From slavery to Jim Crow to current issues with mass incarceration, America has a long-standing history with oppression and racial prejudice. While it’s easy for many to think racism, particularly at an institutional level, to be a thing of the past, a variety of evidences speak to the contrary. With President Nixon’s War on Drugs, criminality became federally sanctioned way to oppress minorities through sentencing discrepancies in crack and powdered cocaine. In conjunction with that, the privatization of prisons has led to the Prison Industrial Complex, further incentivizing incarceration as a means of industry and commerce. Now we are faced …
Ohio's New Sentencing Guidelines: A "Middleground" Approach To Crack Sentencing, Dan Haude
Ohio's New Sentencing Guidelines: A "Middleground" Approach To Crack Sentencing, Dan Haude
Akron Law Review
No abstract provided.
Microwave Detection Of Surface Breaking Cracks In Metallic Structures Under Heavy Corrosion And Paint, John Robert Gallion
Microwave Detection Of Surface Breaking Cracks In Metallic Structures Under Heavy Corrosion And Paint, John Robert Gallion
Masters Theses
"We live in the world of "aging infrastructures". In this environment, critical and heavily utilized infrastructure, i.e. ships, planes, bridges, etc., are operating at or beyond their designed age. Replacement is no longer an option and "retirement for cause" is the current approach to maintenance and replacement. Consequently, there is an ever-increasing demand for efficient and robust nondestructive evaluation (NDE) methods that can determine the physical health of these structures. Large structures, which are primarily made of metals, either steel or aluminum, are susceptible to high-stress cracking and corrosion. Stress-induced cracks in heavily corroded steel, used in bridges, railroads, storage …