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 21 for “"strength gain"”.
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Factors Affecting Strength Gain and Development of a Laboratory Testing Procedure
… project were to assess factors that influence strength gain of lime-cement-soil mixtures and to develop a detailed laboratory test procedure that produces consistent results. Key findings from the research are that a laboratory test procedure that produces consistent results has been developed, …
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Shear strengthening of reinforced concrete beams with bi-directional carbon fiber reinforced polymer (CFRP) strips and CFRP anchors
… Carbon Fiber Reinforced Polymer (CFRP) for strengthening existing RC structures has shown promising results. Although CFRP materials have high tensile strength, the ability to utilize that strength is limited by debonding of the CFRP laminates from the concrete surface. In order to prevent …
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Early Age Assessment of Cement Treated Materials
… deflectometer for assessing early-age strength gain of cement-stabilized materials. Experimentation was performed at four sites on a pavement reconstruction project along Interstate 84 near Morgan, Utah, and three sites along Highway 91 near Richmond, Utah; cement stabilization was used …
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Simplified method for design of stiffened and unstiffened structural tee hangers
… Also, no provisions are made for the additional strength gain due to stiffeners. Past research has shown that the design of these connections is controlled by either plate yielding or bolt rupture. This study presents a simplified method for determining the ultimate strength of structural tee …
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Putting Place Back Into Displacement: Reevaluating Diaspora In the Contemporary Literature of Migration
… only the measurement of unconfined compressive strength. This simple measurement may not be adequate to describe the behavior that results from differing field loading conditions. A series of consolidation tests and unconfined compression tests were conducted with special attention being paid to …
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Impact of Curing Time and Curing Stress On the Mechanical Behavior of Cement-Improved and Cement-Fiber-Improved Soft Soil
… only the measurement of unconfined compressive strength. This simple measurement may not be adequate to describe the behavior that results from differing field loading conditions. A series of consolidation tests and unconfined compression tests were conducted with special attention being paid to …
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Strengthening of timber beams using externally-bonded sprayed fibre reinforced polymers
… of structural elements. It may be used for the strengthening of beams, the seismic upgrade of walls panels, as well as the jacketing of columns to provide confinement. There exist several methods of FRP application for the case of structural retrofits. These include the application of …
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On the Development of 8,000 psi Geopolymer Mortar for Practical Use in Field Applications
… and often require heat curing to facilitate strength gain. Additionally, many geopolymers are created using carefully controlled and high quality materials and activator chemicals. These factors greatly affect the practicality of the material. The goal of this research was to create a …
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Understanding plant water relations and root biomechanics for hydro-mechanical reinforcement of slopes
… differences in matric suction and soil strength. Species with the largest water uptake increased soil strength more than ten times that in fallow soil. Specific leaf area, root length density and root:shoot ratio were best correlated with the induced hydrologic reinforcement provided by …
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An investigation of FRP reinforced glulam bolted connections
… due to its lack of homogeneity and low strength compared to steel and concrete. Wood can become a more versatile material if used with Fiber Reinforced Polymers (FRP) to form a composite. This thesis presents the results of an investigation of the increase in yield strength, ultimate …
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Evaluation of Warm Mix Additives for Use in Modified Asphalt Mixtures: Phase I
… and (3) the impact of long-term aging on strength gain and the moisture damage resistance of WMA mixtures.A total of one aggregate source, four warm mix asphalt technologies (Advera, Sasobit, Revix and Foaming) and three asphalt binder types (neat, polymer-modified and terminal blend tire …
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Characterization and performance of eco and crack-free high-performance concrete for sustainable infrastructure
… (rheological properties) and hardened state (strength gain and shrinkage cracking tendency). Results indicate that it is possible to design Eco-HPC with drying shrinkage lower than 300 µstrain after 250 days and no restrained shrinkage cracking even after 55 days. Reinforced concrete beams …
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Shear Strength Parameters of Sand Fly Ash Cement Mixtures
… F fly ash to assess the improvement of shear strength parameters of granular soils. Two mix designs were developed and tested using consolidated undrained, unconfined compression, and triaxial testing. Mix designs consisted of 15% fly ash with 0.5 or 1% cement, and poorly graded Ottawa sand …
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A Modeling Investigation of Obesity and Balance Recovery
… Previous studies have shown weight loss and strength training to be beneficial to balance, but knowing which is more beneficial will allow researchers to design interventions to maximize the benefits in terms of balance and reducing risk of falls. Therefore, the purpose of the first study was …
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Evaluating shrinkage of fly ash - slag geopolymers
… were cast in order to look at the compressive strength variation with mixes. Isothermal calorimetry was performed on each of the sample to study the heat evolution that accompanies the reaction process and it was seen that at lower molarities, the initial rate of heat evolution was higher as …
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Use of the Clegg Impact Soil Tester to Access Rutting Susceptiblity of Cement-Treated Base Material Under Early Trafficking
… traffic. Trafficking of a CTB before sufficient strength gain has occurred can lead to marring or rutting of the treated layer. The specific objectives of this research were to examine the correlation between Clegg impact values (CIVs) determined using a heavy Clegg impact soil tester and rut …
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Relationship between decomposition level and induced solidification of peat based on laboratory investigation
… of filler and binder to achieve the optimum strength. The peats are categorized as fabric for the less decomposed peat, hemic for the moderately decomposed and sapric for the mostly decomposed peat. The Pontian peat has high moisture content with fabric peat having 970 %, hemic peat, 417 % …
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Property Changes and Mechanisms in Lime-Stabilised Kaolinite in the Presence of Metal Sulphates
… and, to a lesser degree, the relatively slow strength development which is produced.<br/><br/>Thus, the major objective of this work has been first to establish the fundamental material property changes which occur when clay soils are stabilised with lime in the presence of the most commonly …
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HEADED STUD SHEAR CONNECTORS IN FULL-SIZE COMPOSITE BEAMS WITH WIDE RIBBED METAL DECK
… provisions overestimate the observed connector strength. The average predicted strength was approximately 33% higher than the average observed value. Moreover, the coefficient of variation was found to be approximately 61%. The corresponding values for Eurocode 4 were 10% and 19%, respectively. …
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Predictive Modeling and Durability Analysis of Low Carbon Concrete Incorporating Recycled Materials
… was performed to predict the compressive strength of concrete using RCA. Various machine learning models, such as individual learners and ensemble models, were developed and compared. Among them, the Light Gradient Boosting Machine (LightGBM) provided optimal predictive performance (R² = …
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