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You searched for subject:(Aggregate Bridging). Showing records 1 – 2 of 2 total matches.

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Miami University

1. Anderson, Calvin J. Metal Isotope Fractionation Induced by Fast Ion Conduction in Natural and Synthetic Wire Silver.

Degree: MS, Geology & Environmental Earth Science, 2018, Miami University

An unusual metal isotope fractionation has been observed in association with the growth of wire silver, whose unique texture and morphology can be explained by superionic conduction of Ag+ in Ag2S. This constitutes the first recognition of mass migration by fast ion conduction in nature. Stable Ag isotope analysis revealed natural wire silver is normally enriched in the heavy isotope 109Ag, while common fractionation mechanisms would predict the opposite. In synthetic wires grown at high temperature (>450°C), this fractionation is amplified by an order of magnitude more than expected by any known isotope effect. This may indicate a previously unrecognized isotope fractionation mechanism associated with superionic conductors in nature and in general, which would have important implications for the geochemistry of ore deposits, as well as fast-ion technologies including atomic switches and solid-state ion batteries. Advisors/Committee Members: Rakovan, John (Advisor).

Subjects/Keywords: Geochemistry; Mineralogy; Ag isotope fractionation; superionic conduction; mineral aggregate growth; conductive bridging random access memory

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Anderson, C. J. (2018). Metal Isotope Fractionation Induced by Fast Ion Conduction in Natural and Synthetic Wire Silver. (Masters Thesis). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami1532606440752015

Chicago Manual of Style (16th Edition):

Anderson, Calvin J. “Metal Isotope Fractionation Induced by Fast Ion Conduction in Natural and Synthetic Wire Silver.” 2018. Masters Thesis, Miami University. Accessed April 09, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1532606440752015.

MLA Handbook (7th Edition):

Anderson, Calvin J. “Metal Isotope Fractionation Induced by Fast Ion Conduction in Natural and Synthetic Wire Silver.” 2018. Web. 09 Apr 2020.

Vancouver:

Anderson CJ. Metal Isotope Fractionation Induced by Fast Ion Conduction in Natural and Synthetic Wire Silver. [Internet] [Masters thesis]. Miami University; 2018. [cited 2020 Apr 09]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1532606440752015.

Council of Science Editors:

Anderson CJ. Metal Isotope Fractionation Induced by Fast Ion Conduction in Natural and Synthetic Wire Silver. [Masters Thesis]. Miami University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1532606440752015


Indian Institute of Science

2. Keerthy, M Simon. Studies on Fracture and Fatigue Behavior of Cementitious Materials- Effects of Interfacial Transition Zone, Microcracking and Aggregate Bridging.

Degree: 2015, Indian Institute of Science

The microstructure of concrete contains random features over a wide range of length scales in which each length scale possess a new random composite. The influence of individual material constituents at different scales and their mutual interactions are responsible for the formation of fracture process zone (FPZ). The presence of the FPZ and the various toughening mechanism occurring in it, influences the fatigue and fracture behavior of concrete which also gets influenced by the geometry, spacial distribution and material properties of individual material constituents and their mutual interactions. Hence, in order to study the influence of interfacial transition zone, microcrack and aggregate bridging on the fracture and fatigue behavior of concrete, a multiscale analysis becomes necessary. This study aims at developing a linearized model which helps in understanding the fracture and fatigue behavior of cementitious materials by considering the predominant fracture process zone (FPZ) mechanisms such as microcracking and aggregate bridging. This is achieved by quantifying the critical microcrack length and the bridging resistance offered by the aggregates. Further, the moment carrying capacity of a cracked concrete beam is determined by considering the effect of aggregate bridging. A modified stress intensity factor (SIF) is derived based on linear elastic fracture mechanics (LEFM) approach by considering the material behavior at different scales through a multiscale approach. The model predicts the entire crack growth curve for plain concrete by considering these process zone mechanisms. Furthermore, the fracture and fatigue response of concrete is studied through the development of analytical models which include the properties of the mix constituents using the multiscale based SIF. The effect of the interfacial transition zone, microcracks and resistance offered through aggregate bridging on the resistance to crack initiation and propagation are studied. A fatigue crack growth law is proposed using the concepts of dimensional analysis and self-similarity. Through sensitivity analyses, the influence of different parameters on the overall fracture and fatigue behavior are studied. In addition, studies related to concrete-concrete bi-material interfaces are conducted in order to understand the influence of repair materials on the service life of damaged concrete structures when subjected to fatigue loading. An analytical model is proposed in this study to predict the crack growth curve using the concepts of dimensional analysis and self-similarity in conjunction with the human population growth model. It is seen that a repair done with a patch having similar elastic properties as those of the parent concrete will have a larger fatigue life. Advisors/Committee Members: Chandra Kishen, J M.

Subjects/Keywords: Fracture Mechanics; Cementitious Materials; Microcracking; Concrete-Fatigue; Aggregate Bridging; Interfacial Transition Zone; Concrete-Concrete Bi-material Interface; Fracture Process Zone; Concrete Cracking; Linearized Toughness Model; Concrete - Fatigue Behavior; Civil Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Keerthy, M. S. (2015). Studies on Fracture and Fatigue Behavior of Cementitious Materials- Effects of Interfacial Transition Zone, Microcracking and Aggregate Bridging. (Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ernet.in/2005/3538 ; http://etd.iisc.ernet.in/abstracts/4406/G27618-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Keerthy, M Simon. “Studies on Fracture and Fatigue Behavior of Cementitious Materials- Effects of Interfacial Transition Zone, Microcracking and Aggregate Bridging.” 2015. Thesis, Indian Institute of Science. Accessed April 09, 2020. http://etd.iisc.ernet.in/2005/3538 ; http://etd.iisc.ernet.in/abstracts/4406/G27618-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Keerthy, M Simon. “Studies on Fracture and Fatigue Behavior of Cementitious Materials- Effects of Interfacial Transition Zone, Microcracking and Aggregate Bridging.” 2015. Web. 09 Apr 2020.

Vancouver:

Keerthy MS. Studies on Fracture and Fatigue Behavior of Cementitious Materials- Effects of Interfacial Transition Zone, Microcracking and Aggregate Bridging. [Internet] [Thesis]. Indian Institute of Science; 2015. [cited 2020 Apr 09]. Available from: http://etd.iisc.ernet.in/2005/3538 ; http://etd.iisc.ernet.in/abstracts/4406/G27618-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Keerthy MS. Studies on Fracture and Fatigue Behavior of Cementitious Materials- Effects of Interfacial Transition Zone, Microcracking and Aggregate Bridging. [Thesis]. Indian Institute of Science; 2015. Available from: http://etd.iisc.ernet.in/2005/3538 ; http://etd.iisc.ernet.in/abstracts/4406/G27618-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.