Thesis (Ph.D.) - Carleton University, 2007. / Includes bibliographical references (p. 317-325). Also available in electronic format on the Internet.

Thesis (Ph. D.)--West Virginia University, 2000. / Title from document title page. Document formatted into pages; contains x, 179 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 149-153).

Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisors: David W. Fowler and Edward J. Garboczi. Vita. Includes bibliographical references.

Thesis (M.S.)--Montana State University--Bozeman, 2007. / Typescript. Chairperson, Graduate Committee: Robert L. Mokwa. Includes bibliographical references (leaves 89-91).

published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy

A RESEARCH REPORT SUBMITIED TO THE FACULTY OF ARCHITECTURE. UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG, FOR THE DEGREE OF MASTER OF SCIENCE IN BUILDING / This research project is an investigation into the effect of the grading of perlite lightweight aggregates on the resultant concrete strengths. Lightweight concretes are reviewed. Perlite, as a lightweight aggregate, is assessed. Grading theory for aggregates and in particular lightweight aggregate is analysed. A series of mix designs are proposed with manipulation of the grading of the perlite as the only variable. This is so that variations in compressive strength and density may be assessed in terms of the grading of the perlite. Those mixes are undertaken and tested for compressive strength and dry density. In this research project compressive strength is considered a benefit, while mass is considered a disadvantage. The performance of a lightweight concrete is assessed firstly in terms of the Power Factor. The Power Factor is the compressive strength divided by the dry density of a concrete. The performance of lightweight concretes produced with Perlite aggregate is assessed secondly in terms of the Cement Content factor. The Cement Content Factor is the Power Factor divided by the Cement Content. This factor has the effect of creating a common denominator of the cement content. An evaluation of the results yields the conclusions detailed in chapter Eight, the principal two being: • The optimal perlite grading tested was a monodisperse, single size fraction, of between 600 and 1180 microns. • The most practical measure for manufacturers to improve the performance of lightweight / Andrew Chakane 2019

No description available.

In 1987, Congress authorized a 5 year $150 million dollar research program called the Strategic Highway Research Program (SHRP). SHRP was divided into four major areas, including the asphalt research program. The asphalt research program was divided into six major research contracts, one such contract, SHRP-003A was called Performance Related Testing and Measuring of Asphalt Aggregate Interaction and Mixtures. Oregon State University performed the portion of this contract related to the development and validation of accelerated test procedures for aging, low temperature cracking, and moisture sensitivity of asphalt-aggreagte mixtures. This thesis contains five independent papers that discuss elements of the development, validation, and or implementation of these accelerated test procedures. In the first paper, the relationship between field performance and laboratory aging properties of asphalt-aggregate mixtures is discussed, including the relative importance of asphalt binder and aggregate type on the amount of aging experience. Based on this work recommended aging procedures are presented to simulate different environmental conditions and pavement age. The second paper makes use of the large body of resilient modulus data conducted as part of the SHRP research effort to compare data obtain in the diametral and the triaxial mode. It is not possible to give a relationship between triaxial and diametral resilient modulus, without describing specimen geometry and other test conditions. The third paper discusses the effect of aging on the thermal cracking properties of asphalt-aggregate mixtures. The temperature at which aging occurs affects the way cold temperature fracture properties change with time. Low temperatures result in quenching of the aging process, while high temperatures result in continued aging. The fourth paper discusses work conducted in association with the Oregon Department of Transportation to extend the environmental conditioning system (ECS) test procedure for moisture assessment to open graded mixtures. Comparison in the ECS of mixtures with and without anti-strip agents added indicates that they don't always decrease moisture damage potential. The final paper presents a discussion of asphalt chemistry and its relationship to asphalt-aggregate mixture performance. Using the SHRP asphalt model, aging and low temperature performance data collected at Oregon State University is explained. / Graduation date: 1995

Thesis (Ph. D.)--University of Washington, 2006. / Vita. Includes bibliographical references (leaves 191-196).

Thesis (M.A. in applied economics)--Washington State University, May 2007. / Includes bibliographical references (p. 71-73).