Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Service Life Prediction"”.
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Reliability analysis and service life prediction of pipelines
… should be considered in both the strength and serviceability analysis of pipes. The study in this research focuses on two different types of buried pipes including concrete pipes in sewage systems (concrete sewers) and cast iron water pipes used in water distribution systems. This research …
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Durability Assessment and Service Life Prediction of Concrete in Extreme Aggressive Environment
… these correlations and based on the target service life, the research aims to set appropriate thresholds for Surface Resistivity (SR) and Bulk Resistivity (BR) tests, which will be used to qualify concrete mixes used in in extremely aggressive chloride environments. To achieve these …
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Modelling of transport processes involved in service life prediction of concrete: important principles
The main focus in this licentiate thesis is a description of the environmentally introduced action of diffusing and chemically reactive (e.g. carbonation and chemical-physical adsorption-desorption) matter in the pore solution and in the air-filled space in the pore system of the material. The …
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Probabilistic service life prediction of composite viscoelastic cylindrical structure under random outdoor environment
… a general methodology for probabilistic service life prediction of a composite viscoelastic cylindrical structure under random outdoor environment. The analysis emphasized both the statistical variations of environmental thermal loads and of material properties. The daily probability of …
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Mechanistic service life prediction of rigid pavement joint sealant: a new laboratory testing technique
A new method to evaluate the performance of sealants used in rigid pavement joints was developed. A special fixture, attached to a servo-hydraulic testing machine, was designed to transfer applied cyclic shear deflection to a sealant sandwiched between two 51 x 51 x 51 mm portland cement concrete …
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An analytic hierarchy process and Markov chain based approach for condition rating and dynamic service life prediction of retaining walls
… condition data forms the basis of the dynamic service life prediction using the Markov chain.
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Chloride penetration in concrete: evaluation of rapid conductivity methods and development of a service life prediction model for marine conditions
… corrosion is the predominant cause of loss of service life in reinforced concrete structures subjected to marine conditions. To protect reinforcing steel from the corrosive effects of external chloride ions present in these environments, a proper combination of concrete quality and cover depth …
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The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete
… Africa were investigated, aiming at improving service life prediction models for reinforced concrete structures situated in marine exposure classes. Time-dependent chloride ingress was measured over a period of roughly 4 years with respect to the influences of binder type, w/b ratio and …
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Estudio de métodos probabilísticos para la predicción de la vida útil de estructuras de hormigón : influencia del factor variabilidad espacial en el caso de plataformas offshore en Brasil
… to the development for the methods and models of service life prediction of concrete structures. However, for satisfactory reliability levels, the utilized models to the durability evaluation of concrete structures, needs experimental investigation based on the environmental and construction …
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Corrosion Behavior of Corrosion-Resistant Steel Reinforcements in High and Ultra-High Performance Concrete in Chloride Attack Environments
… Additionally, this dissertation presents service life prediction and life cycle cost analysis of RC structures made with different types of concrete and reinforcements. Firstly, an experimental program was conducted to investigate the corrosion performance of the corrosion-resistant …
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A Low-Cost Method of Airspeed Data Acquisition via Image Processing and Experimental Aerodymanic Load Calculation Using Panel Methods
… memory. A project was undertaken to develop a service-life prediction method to better understand composite use in this market segment. Most general-aviation aircraft do not possess flight data acquisition systems to gather in-service information. As such, this thesis presents the development …
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Enhanced Detection of Corrosion and Coating Aging Mechanisms Using Core-Shell Quantum Dots
… mechanisms in coatings during their servicable life is complicated, due to the inherent stochastic nature of exposure profiles, service environments, and rare weather events. Thus, the development of improved test methods for service life prediction and accelerated weathering relies on the …
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Review of current asset maintenance in South African ports and recommendations for smart port maintenance
… terms of their exposure conditions, durability, service life prediction and effective tests to assess chloride induced deterioration. The benefits of smart port maintenance technology are explored using case studies from international ports such as the Hamburg Port Authority (HPA) in Germany and …
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An Investigation of Nailed Connection Performance in a Cyclic Humidity Environment
… component in developing a holistic model for service-life prediction of nailed connections in light-frame residential construction.
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A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures
… proposed design tool assists in computing the service life of carbonating concrete structures and provides reliability values associated with the service life. It accounts for different binder compositions and binder types, as well as different locations and environmental land uses in South …
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Effects of moisture on debonding in FRP-retrofitted concrete systems
… under variable cyclic moisture conditions for service life prediction of the FRP-strengthened systems. To incorporate this quantification method and experimental data, finite element analysis and correlation study have been conducted for RC beams externally strengthened with FRP plate. The …
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An investigation into the relationship between surface concrete resistivity and chloride conductivity test
… cover. It is also used as an input parameter for service life prediction (SLP) of RC structures in the marine environment, using a modified version of Crank’s solution to Fick’s second law of diffusion. The surface concrete resistivity test is an electrochemical test that has a good correlation …
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Assessing the influence of crack width on the durability potential of cracked concrete using the durability index approach
… concrete (RC) structures. RC structures both in service and new, are subject to cracking. Irrespective of the cause of the cracking, cracks can increase the rate of penetration of aggressive species into concrete and modify the transport properties. Consequently, the service life of …
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Service life extension of reinforced concrete structures using hydrophobic impregnation
… of existing structures to maintain serviceability while indirect costs include loss in productivity and reduced economic growth. With increasing demand for infrastructure and subsequent expansion of the built environment, there is greater need for concrete to withstand and perform in …