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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.


Alsayed, Saleh Hamed January 1983 (has links)
No description available.

Cracking, damage and strain localization in concrete structures /

Chen, Gongfa. January 2001 (has links) (PDF)
Thesis (Ph. D.)--University of Queensland, 2002. / Includes bibliographical references.

Early age autogenous shrinkage of concrete /

Holt, Erika E. January 2001 (has links)
Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (leaves 190-196).

Mechanisms of salt frost scaling of portland cement-bound materials : Studies and hypothesis /

Lindmark, Sture. January 1999 (has links) (PDF)
Thesis (Ph. D.)--Lund University, 1999. / Title page and front materials are not part of this file. Includes bibliographical references (p. 261-266).

Properties of mortars with binary and ternary blended cementitious materials

Li, Yan, 李彦 January 2012 (has links)
During the past few decades, concrete technology has been developing rapidly followed with huge popularity of high-performance concrete (HPC). However, the mix design for HPC still remains a major challenge due to the wide adoption of mineral and chemical admixtures, the effects of which are rather complicated and not yet fully understood. To resolve this issue, this thesis presents a comprehensive experimental study focused on the physical effects of some supplementary cementitious materials (SCM) on the fresh and hardened properties of mortar. Based on the experimental results, some fundamental parameters governing the performance of mortar were investigated. It has been postulated by some researches that increasing the packing density of the particle system would improve the rheology and strength of concrete. Through adding SCM finer than cement to increase the packing density, the voids between solid particles will be reduced so that more excess water can be released to provide better lubrication. Through adding two kinds of SCMs with different fineness, the packing density will be further enhanced by the successive filling action. In this study, a wet packing method, which is newly developed at the University of Hong Kong, was used to directly measure the packing densities of mortars with binary and ternary blended cementitious materials. The filling effect and successive filling action were both quantified through the packing density results. The study revealed that the addition of fine SCM will, not only increase the packing density, but also increase the solid surface area, which will have negative effect on the rheology of mortar. To combine the effects of water content, packing density and solid surface area together, we proposed a new parameter called water film thickness (WFT), defined as the average thickness of water films coating the solid particles and evaluated as the excess water to solid surface area ratio. The results demonstrated that the WFT plays a key role in controlling the rheology and strength of mortar. Hence, it is the WFT, rather than the packing density, that should be maximized at given water content in the mix design of HPC. The addition of fine SCM will increase both the excess water content and solid surface area. The effects on the both sides can be quantified by the WFT no matter how complex the cementitious system is. Therefore, the WFT could be used as an effective indicator to adjust the SCM content. Joint addition of fine SCM at different level finer than cement to make a ternary cementitious system can effectively increase the packing density without excessively increasing the solid surface area. As a result, the ternary cementitious system has higher effectiveness than the binary cementitious system in improving the performance of mortar. / published_or_final_version / Civil Engineering / Master / Master of Philosophy

An investigation of the effects of variations in aggregate gradation upon the strength and absorption of zero slump concrete made from aggregates of the same fineness modulus

Clay, Ernest Charles 08 1900 (has links)
No description available.

The effects of liquid nitrogen on concrete hydration, microstructure, and properties

Hema, John, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

A fracture mechanics study of concrete failure /

Du, Jiaji, January 1988 (has links)
Thesis (Ph. D.)--University of Washington, 1988. / Vita. Bibliography: leaves [223]-235.

Modeling temperature sensitivity and heat evolution of concrete

Poole, Jonathan Larkin, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

Application of the hybrid finite element procedure to crack band propagation

Zheng, Hui. January 1987 (has links)
Thesis (M.S.)--Ohio University, August, 1987. / Title from PDF t.p.

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