Masters Theses

Abstract

"De-watering of refractory concrete is greatly influenced by the permeability of the concrete, which in turn is a complex property determined by gradation of the aggregate in the mixture, water/cement ratio of the mixture, additives, curing condition of the concrete, and composition of the cement. The permeability of concrete is known to be related to the porosity of the mixture.

Permeability of a commercial refractory castable product measured by rapid determination of chloride ion permeability was related to its microstructure. This technique was utilized as a screening method for low permeability and low porosity monolithics. The theory and methodology of rapid determination of chloride ion permeability are appended; the testing method is also evaluated.

Scanning Electron Microscopic analysis of a typical CA cement-based castable is included. BEI and SEI imaging techniques were applied to provide qualitative information on pore structure. The types of pores observed in this study confirmed results reported by other investigators. Atomic Force Microscopy was also conducted and allowed imaging of the finest gel and capillary pores in the structure, providing useful information on the pore structure.

Another commercial product was exposed to a temperature gradient and analyzed by SEM. The impact of the type of heat treatment on the microstructure of the castable was also investigated.

A complete literature review on the permeability measurement and related properties of construction concrete is appended"--Abstract, page iv.

Advisor(s)

Moore, Robert E., 1930-2003

Committee Member(s)

Day, D. E.
Hagni, Richard D.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Comments

This work was made possible by a research grant from the American Iron and Steel Institute (AISI).

Publisher

University of Missouri--Rolla

Publication Date

Fall 1994

Pagination

xii, 114 pages

Note about bibliography

Includes bibliographic references (pages 108-113).

Rights

© 1994 DongDong Huang, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Thesis Number

T 6874

Print OCLC #

32793741

Electronic OCLC #

1098178184

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b2703116~S5

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