ACI Global Home Middle East Region Portal Western Europe Region Portal
Email Address is required Invalid Email Address
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
Topics In Concrete
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
Document:
SP74-03
Date:
August 1, 1982
Author(s):
William A. Ellingson
Publication:
Symposium Papers
Volume:
74
Abstract:
Refractory concrete linings are essential to protect steel pressure boundaries from high-temperature aggressive erosive/corrosive environments in many energy-intensive commercial processes such as blast furnaces and petrochemical plants, and in new industries such as synthetic fuel production. Advanced nondestructive evaluation methods are being developed for assessing the integrity of refractory linings. Radiographic techniques, thermography, acoustic-emission detection, and optical laser interferometry have been shown to yield information on the structural status of refractory concrete. Methods using 60Co radiation sources can yield measurements of refractory wear rate and images of cracks and/or voids in pre- and post-fired refractory linings up to 60 cm thick. Thermographic (infrared) images serve as a qualitative indicator of refractory spalling, although quantitative measurements are difficult to obtain from surface-temperature mapping. Acoustic emission has been shown to be a qualitative indicator of thermomechanical degradation of thick refractory panels during initial heating and cooling. Laser interferometry methods have been shown to be capable of completely mapping refractory lining thicknesses. This paper presents recent results obtained from laboratory and field applications of these nondestructive evaluation methods in petrochemical, steel, and coal-conversion plants.
DOI:
10.14359/6392
SP74-04
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.
10.14359/6393
SP74-05
Richard Shultz
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.
10.14359/6394
SP74-06
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.
10.14359/6395
SP74-07
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.
10.14359/6396
Results Per Page 5 10 15 20 25 50 100
Edit Module Settings to define Page Content Reviewer