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 20 of 20 for “"hydration process"”.
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Heat of Hydration Thermal Performance and Flexural Capacity of Stainless-Steel Reinforced Concrete Sections
… the potential for concrete cracking during the hydration process. To address this concern, a thermal-structural finite element model was developed to predict the stresses in SS reinforced concrete (RC) sections during the hydration process. Different curing regimes were taken into consideration. …
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The Effects of Early-Age Stress on the Elastic and Viscoelastic Behavior of Cement Paste
… composition implying that stress accelerates the hydration process. The reasons behind the acceleration are discussed and incorporated into a preliminary solidification-dissolution model for beam relaxation. The model, though in need of improvement through further research, shows promise in …
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Activation of Release by Hydration in Pharmaceutical Tablets Studied by Terahertz Pulsed Imaging
… disintegrate (e.g. sustained release tablets), hydration of the oral solid dosage form still plays a critical role in activating the drug release. In this thesis, terahertz pulsed imaging (TPI) was used to investigate the hydration kinetics of pharmaceutical tablets in a one-dimensional liquid …
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Autonomous Small Scale Data-logger for Temperature Mapping
Modern manufacturing processes require minimal human intervention and a high degree of automation to meet industry demands. Due to variability in industrial process conditions, custom systems are often sought for these applications. These systems must be compact, economical, and capable of …
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Formwork pressure and rheology of self consolidating concrete
… in the initial hours after casting before the hydration process becomes dominant.
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Shrinkage of concrete using porous aggregates
… ratio is lower, but later on in the hydration process, shrinkage increases as the volume/surface ratio increases. Effect of curing on shrinkage was found to be a complex phenomenon. It is difficult to establish the benefits of curing on total shrinkage based on the results, as some …
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Development and Applications of Opioids Alternatives for Pain Management
… refine the release kinetics of TTX. Initially, a hydration-induced void-containing hydrogel system was created to encapsulate TTX physically. Following a simple hydration process between the polymer and the TTX solution, TTX was successfully encapsulated in voids shielded by densely packed …
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LARGE-EDDY SIMULATION OF DEEP-WATER HYDROCARBON PLUME DYNAMICS
… is strongly affected by the gas dissolution and hydration process that weakens the bubble-induced buoyancy for driving the plume. In this study, a new modeling strategy is developed to efficiently incorporate the gas dissolution and hydration effects into a fast Eulerian-Eulerian large-eddy …
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Time-Space-Resolved Raman Analysis of Structure-Property Relationships in Heterogeneous Structural Materials
… of C-S-H is analyzed, and the real-time hydration process of cementitious materials is visualized. The Raman spectrum of C-S-H obtained from insitu underwater Raman spectroscopy corroborates Gartner’s C-S-H model. Moreover, the earlystage cement hydration dynamics are visualized for the …
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The effects of priming on vigor and viability of broccoli (Brassica oleracea var. italica Plenck) seeds
Seed priming is a controlled hydration process, followed by dehydration, that allows pregerminative metabolic activity to proceed without germination. The objective of this research was to investigate the effects of priming on intrinsic characteristics of seed germination including temperature, …
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Influencia de las condiciones de curado en el comportamiento del hormigón sometido a ciclos hielo-deshielo
… peso y cambios de longitud. ABSTRACT Freeze–thaw process is one of the main causes of concrete degradation in cold regions. In central and eastern Europe, the climatic conditions in the winter season are particularly severe for concrete construction. The successive freezing/thawing cycles cause …
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Innovation in Piezoceramic Based Structural Health Monitoring
… understanding its very early age (0-20 hours) hydration performance is of great importance. This dissertation proposes a novel approach to this topic using smart aggregate based active sensing approach. Two modes of smart aggregate, compressive mode and shear mode, were investigated and the …
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From atoms to cities : A bottom-up analysis of infrastructure materials and systems
… measured experimentally throughout the cement's hydration process. Afterwards, we show that the building envelope's heat transport property is among the set a few influential parameters that affect heat losses at the city scale. This subset of key parameters makes it feasible to construct a high …
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Stabilisation of sulphide rich soil: problems and solutions
… consuming both calcium and sulphate in the process and leading to slightly reduced pH levels compared to similar unmellowed samples. Further additions of lime give further change to the engineering properties of the LOC, up to an addition of 6%Ca(OH)2 or 4.5%CaO. Further additions result …
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Development of a New Environmentally Friendly Glass Fibre Reinforced Cold Mix Microasphalt with High Resistance to Cracking and Deformation.
… effectiveness, safety and enhanced production processes. Today in the UK, the use of cold mix attracts less interest, as these mixtures show low strength to resist traffic loading due to rainfall. Microasphalt is a cold mix applied wearing course which is deemed as an important player in the …
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Development of a New High Performance Cold Mix Asphalt
… were used to investigate the development of hydration products in the new CBEM. Concentrations of heavy metals in the samples incorporating ATBF2, were observed to be less than the regulatory levels determined for hazardous materials. The mechanical properties of the novel CBEM incorporating …
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Development of a New Cold Binder Course Emulsion Asphalt
… with Ca(OH)2 creating C-S-H gel through the hydration process. This results in a very high early strength and improved mechanical properties. Balanced oxide compositions, within the new filler, were identified as responsible for an enhanced hydration reaction. A laboratory programme of …
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Engineering Properties, Hydration Kinetics, and Carbon Capture in Sustainable Construction Materials
… calorimetry (IC) to quantify the heat of hydration of the mixture to assess the chemical aspects of the stabilization. Specifically, kaolin and bentonite clays were each blended with 40 % SFS by mass at water-to-binder ratios ranging from 1.0 to 1.5. The hydration properties of stabilized …
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Development of Next-Generation Construction Materials with Graphene Additives
… industrially manufactured by an electrochemical process on compressive and tensile strengths of cement-based mortars reveals that the addition of PRG to mortars improves their mechanical properties, with characteristic concentration dependence. The mortar with 0.07% PRG is identified as the …
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Dosificación, propiedades y durabilidad en hormigón autocompactante para edificación
… and therefore the problems associated with this process, such as noise, and different health risks are avoided. With this type of concrete formworks and molds can be perfectly filled, even in the case of highly dense reinforcement, and a high quality concrete surface is achieved. Since its …