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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 11 Abstracts search results
August 1, 1982
S.A. Bortz, R.F. Firestone, and M.J. Greaves
Refractory is a construction material which is used in hot, hostile environments where plain concrete fails. Although concrete practice can be used as a guide, there are many special factors which must be taken into account to develop an optimum design. A thorough understanding of these factors is essential for successful refractory castable application.
Timothy J. Fowler
American Concrete Institute Committee 547 has introduced the concept of rational design based on a comprehensive analysis of the stress and strain fields. The approach utilizes recently developed thermal and stress analysis techniques to predict the service performance and life of a refractory. With this knowledge, a more optimum design can be developed, and design for a specific life is feasible.
Current design practice is often based on relative material properties, and trial and error design techniques. While satisfactory for many situations, this approach breaks down when a background of experience is not available.
The rational design approach provides insight into the behavior of the refractory and can be applied to the overall refractory system, or to small isolated components. The analytical techniques are relatively new and the application to refractory is still in its infancy.
Successful use of rational design techniques will result in reduced initial cost, savings of downtime, and improved performance. Considerable research and development work is required to refine, simplify, and apply this new design approach, and to develop the required engineering data.
Steps taken to determine the cause of failure of a shotcreted lining in a Sinter Plant Mist Separator included testing and characterization of several refractory concretes and a detailed analysis of the most likely causes for failure. Test methods and results, environmental characterization and a step by step analysis of possible causes for failure are described. Completion of the study led to elimination of the present stack material combination with replacement by a 316 stainless steel stack.
Wesley C. Lueking
Plastic refractories fail from anyone of five general causes. One of these is improper installation. A case history is presented of a large monolithic job where several fundamentals of installation were not followed and subsequent replacement was required.
Richard G. LaBar
The purpose of this paper is to provide a description of performance criteria for refractory concretes, or castables, in the melting, holding, and transfer of aluminum alloys in ingot plants. Refractory concretes in these applications have three mechanisms of failure which are attributed to anomalies in refractory installation, thermomechanical stability and chemical stability. Chemical stability indicates the refractory concrete's resistance to corrosive effects of chlorine gas, molten metal, and alkali vapors.
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