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The structural behavior of higher strength concreteHiremagalur, Narayan Babu D. January 1985 (has links)
Call number: LD2668 .T4 1985 H57 / Master of Science
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Nonlinear behaviour of reinforced concrete coupling beams趙作周, Zhao, Zuozhou. January 2001 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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Reinforced concrete column behavior under cyclic loading熊朝暉, Xiong, Zhaohui. January 2001 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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Effects of repetitive loading on prestressed concrete beams with unbonded tendonsYim, Chun-nam, 嚴鎮南 January 1972 (has links)
published_or_final_version / Civil Engineering / Master / Master of Philosophy
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Effects of water content, packing density and solid surface area on cement paste rheologyWong, Hin-cheong, Henry., 黃憲昌. January 2007 (has links)
published_or_final_version / abstract / Civil Engineering / Doctoral / Doctor of Philosophy
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Durability evaluation of cement-based repair materials used for corrosion-damaged steel-reinforced concrete structuresWang, Boyu 27 April 2018 (has links)
Concrete repair materials are being widely used to restore and extend the service life of structures. While most cement-based repair materials are compatible with concrete structures, their durability properties do not attract much attention which it deserves from researchers. Since repair materials can deteriorate like conventional concrete, the search for reliable, long-lasting concrete repair materials is becoming more intensive. Amongst other factors, concrete permeability and chloride diffusivity within concrete are believed to play a major role in determining the durability and success of the repair. These two parameters determine the penetration rate of aggressive substances into concrete and how fast degradation could take place. A number of test methods have been proposed to study these two factors, and the commonly used test methods are water penetration, surface/bulk electrical resistivity, rapid chloride permeability (RCP), and half-cell potential. However, the relationship between each durability test method and their correlation with compressive strength measurement have not been fully understood. So, in this study, we aim for using multiple testing techniques, destructive and non-destructive, to evaluate the durability of concrete repair materials as well as correlating different test methods.
Three types of commercially available cement-based materials are tested and evaluated, and results have indicated that cementitious concrete mortar (termed as Mix M) amongst others has the best durability performance which means low water permeability, high resistivity, and compressive strength. Whereas, the flexural performance of Mix M still needs some improvement in terms of flexural strength and flexural toughness. For various durability testing methods, surface resistivity is found to have a strong linear relation and a polynomial relation to bulk resistivity and water permeability respectively. No relationship is established between concrete resistivity and compressive strength, though high-strength concrete tends to have a high resistivity in our study. RCP test results do not correlate well with resistivity measurements, which requires further study to overcome its heating and binding effect when measurements are being taken. Half-cell potential method is used for validating test results but it reveals no difference for materials with different permeability and resistivity.
A model is proposed to counteract temperature’s effect while calculating the coefficient of diffusion, which indicates the concrete to resist chloride diffusion. It is found that this model can shift the RCP measurement slightly closer to its theoretical prediction but the difference between them is still large. Therefore, further research is required for acquiring more raw data from RCP measurements as the regression analysis input. In addition, a more comprehensive model that involves more correction factors for binding effects, etc., is also needed. / Graduate / 2020-04-30
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Mechanical properties of glass fiber reinforced concrete, and applications in structural designDesai, Bakul B January 2010 (has links)
Photocopy of typescript. / Digitized by Kansas Correctional Industries
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Microbial Induced Degradation in Synthetic Fiber Reinforced Concrete Samples in South FloridaUnknown Date (has links)
Synthetic fiber reinforced concrete sample sets were exposed to two different environments. One set, of six samples, was exposed to filtered seawater in the lab with wet and dry cycles, while the other set of samples was exposed, on a barge, to the marine environment, in the intracoastal waterways, at SeaTech. The samples were exposed for 8 months, and then removed for experimental and mechanical testing. Upon removal, the barge samples were photographed to observe surface organisms that were attached to each sample. The barge samples, after cleaning, were then exposed to UV light to observe surface bacteria. The barge samples were also taken to Harbor Branch facility for DNA testing, and then sent in for sequencing. This sequencing was used to identify the organisms that were present inside the concrete samples. An Indirect Tensile Strength Test, IDT, was performed on both sets of samples to observe the first crack, max load, and fracture toughness of each sample. The Barge samples had a lower first crack, max load, and fracture toughness, which means that it took less force to break these samples, than the Seawater samples. As the fiber content increased, the Seawater samples grew stronger, while the Barge samples grew weaker. Also, as the fiber content increased, the biodiversity found on the surface of the Barge samples increased as well. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection
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Combined bending, torsion and shear of reinforced concrete beams.Grimes, Melvin J. January 1973 (has links)
No description available.
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Full-range behaviour of concrete beams partially prestressed with unbonded tendonsTso, Karmen. January 2007 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.
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