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Adhesive Bonding of Concrete-steel Composite Bridges by Polyurethane ElastomerCheung, Billy Siu Fung 30 July 2008 (has links)
This thesis is motivated by the use of full-depth, precast, prestressed concrete panels to facilitate deck replacement of composite bridges. The shear pockets required in using convention shear stud connections, however, can cause durability problems. The objective of this study is to investigate the possibility of eliminating the use of shear studs, and adhesively bond the concrete and steel sections.
The feasibility of the developed polyurethane adhesive joint is defined based on the serviceability and ultimate limit states. The joint must have sufficient stiffness that additional deflection due to slip must not be excessive. The adhesive and bond must also have sufficient strength to allow the development of the full plastic capacity of the composite section. The use of the developed adhesive joint in typical composite bridges was found to be feasible. The behaviour under live load was found to be close to a fully composite section.
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Investigating the Process of Cement Line Maturation on Substrate Surfaces with Submicron UndercutsKo, James Chih-Hsien Jr. 06 January 2011 (has links)
The cement line is the first mineralized matrix deposited on an implant surface during contact osteogenesis forming the bone/implant interface. The hypothesis underlying the present project was that non-collagenous cement line proteins must be deposited into the submicron undercuts on substrate surfaces prior mineralization. In vitro osteogenic cultures were used to grow bone nodules on Thermanox® coverslips modified with calcium phosphate nanocrystals, creating an undercutted surface. Electron microscopy was used to observe cement line formation. BSP immunogold labelling was used to determine if the cement line organic matrix is deposited within undercuts prior mineralization. The results showed the deposited bone nodules, and on test coverslips the deposited cement line was thicker and evenly distributed than control. Furthermore, positive BSP labelling was found within the undercuts prior to cement line mineralization. Thus, it can be concluded that cement line proteins are deposited into submicron undercuts on substrate surfaces prior to mineralization.
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Transient liquid phase bonding of ferritic oxide dispersion strengthened alloysKrishnardula, Venu Gopal, January 2005 (has links) (PDF)
Thesis (Ph.D.)--Auburn University, 2005. / Abstract. Vita. Includes bibliographic references (ℓ. 156-170)
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Hexagonal lattice based hydrogen-bonding receptors for guanidine and urea & practical applications of surfactantsAmbatipudi, Sailaja Govindaraju. January 2007 (has links)
Thesis (Ph. D.)--University of Nevada, Reno, 2007. / "August, 2007." Includes bibliographical references (leaves 150-154). Online version available on the World Wide Web.
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Energy changes in relation to the electronic charge distribution: I. Hydrogen bond formation. II. Rotation and inversion barriers. III. Hydrolysis reactions of "high-energy" phosphorus compounds.Cheeseman, James Richard. Bader, R.F.W. Unknown Date (has links)
Thesis (Ph.D.)--McMaster University (Canada), 1993. / Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6220. Adviser: R. F. W. Bader.
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The influence of porosity levels on shear strength and water movement in a resin-modified glass ionomer restorative cement (Fuju II LC Improved) : thesis submitted for the degree of Master of science in Dentistry, Dental School, Faculty of Health Sciences, the University of Adelaide /Koutsikas, Peter. January 2004 (has links) (PDF)
Thesis (M.Sc.Dent.)--University of Adelaide, Dental School, 2004. / "April 2004" Includes bibliographical references (leaves 73-87).
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Hydrogen atom transfer reactions of iron and cobalt tris alpha-diimines : a study of intrinsic and thermodynamic effects /Mader, Elizabeth Anne. January 2007 (has links)
Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (p. 169-185).
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Copper to copper bonding by nano interfaces for fine pitch interconnections and thermal applicationsJha, Gopal Chandra. January 2008 (has links)
Thesis (M. S.)--Materials Science and Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Rao R. Tummala; Committee Member: C. P. Wong; Committee Member: P. M. Raj.
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Ultra thin ultrafine-pitch chip-package interconnections for embedded chip last approachMehrotra, Gaurav. January 2008 (has links)
Thesis (M. S.)--Materials Science and Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Prof. Rao R Tummala; Committee Member: Dr. Jack Moon; Committee Member: Dr. P M Raj.
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Microstructure - mechanical property relationships in transient liquid phase bonded nickel-based superalloys and iron-based ODS alloysAluru, Sreenivasa Charan Rajeev, Gale, W. F. January 2006 (has links) (PDF)
Dissertation (Ph.D.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references.
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