Thesis (Master)--İzmir Institute of Technology,İzmir, 2005 / Includes bibliographical references (leaves. 84-89).

Thesis (M.S.)--University of Texas at El Paso, 2008. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.

Thesis (M.S.)--University of Texas at El Paso, 2009. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.

Originally presented as the author's Thesis (Helsinki). / Includes bibliographical references (p. [97]-103).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1958. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 71-76).

Thesis (M.S.)--Seoul National University, 1979. / Added title page in Korean. Includes bibliographical references (leaves 57-63).

The study was undertaken to investigate the effects of rate of strain and structure on the development of true cohesion and true friction in a saturated cohesive soil. The soil investigated was a locally available sensitive clay. The various methods proposed by different investigators to measure true cohesion and true friction are reviewed. After some trials the method adopted was that proposed by Bishop (1962) in which over-consolidation is used to obtain samples at the same void ratio but different initial effective stress. All samples were tested in undrained triaxial compression. To investigate the effects of rate of strain on the development of true cohesion and true friction, the results were compared for two identical sets of samples tested at two significantly different strain rates. To investigate the effects of structure on the development of true cohesion and true friction, a technique was developed to remold the specimens in place at constant void ratio after they had been sheared in the undisturbed state. Remolding has the effect of breaking-down the structure of a sensitive undisturbed clay. The test results from undisturbed and remolded samples were compared. In general the investigation showed that in the undisturbed clay the strength in terms of maximum (Ϭ₁-Ϭ₃) decreased with decreasing strain rate, however, the strength in terms of (Ϭ⁻₁/Ϭ⁻₃) max, was not significantly affected by strain rate when compared on an effective stress basis. In remolded clays there was a tendency for the strength in terms of maximum (Ϭ₁-Ϭ₃) to increase with increasing time to failure. In the undisturbed clay true cohesion developed rapidly at small strains, attained a peak and decreased to zero at large strains. True friction was mobilized slowly and attained a maximum value at large strains. At strains less than 8% both true friction and true, cohesion increased with increasing strain rate. However, at large strains true friction and true cohesion were not affected by strain rate. In the remolded clay true cohesion developed slowly attaining a small but significant value which remained constant with strain. The maximum value of true cohesion in the remolded clay was very much lower than that for the undisturbed clay. The development of true friction with strain was essentially unaffected by remolding and both the undisturbed and remolded clay developed about the same maximum value of true friction at large strains. The observed behaviour was explained in terms of changes in clay structure with strain rate and remolding. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

No description available.

No description available.

The optimization of the production of fired clay brick is essential in order to maintain a sustainable industry in Ontario. While there exists areas for improvement of the properties of bricks used in severe climates, concerns including non-renewable resource depletion, increasing energy costs, and waste management have become increasingly important in Canadian and global industries. One method to address these concerns is the use of waste additives as fluxing agents in bricks. While a fluxing agent reduces the firing temperature required for sintering of the brick and improves properties, the use of a waste additive can decrease the dependency of the industry or non-renewable resources such as mined clay or crushed shale. Waste additives can improve strength durability, and absorptive properties, while decreasing firing temperature, and diverting waste from landfills. A testing program was developed to determine the effects of several variables in brick production, including extrusion and firing, and to investigate the effect of the addition of non-recycled waste glass in the properties of fired clay brick. The addition was varied in the particle size of the waste glass and the percentage by mass of additive. The effects of waste glass addition were determined in terms of absorption, strength, and freeze-thaw durability of the individual specimens. Microstructure was also investigated using SEM images and mercury intrusion porosimetry to determine the effect on pore structure and vitrified matrix of the bricks. The results of the testing program determined an optimal addition of waste glass, and the expected effects of the implementation of this addition to the production of fired clay brick in an industrial setting. / Thesis / Master of Applied Science (MASc)