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
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
Staff Directory
ACI World Headquarters 38800 Country Club Dr. Farmington Hills, MI 48331-3439 USA Phone: 1.248.848.3800 Fax: 1.248.848.3701
ACI Middle East Regional Office Second Floor, Office #207 The Offices 2 Building, One Central Dubai World Trade Center Complex Dubai, UAE Phone: +971.4.516.3208 & 3209
ACI Resource Center Southern California Midwest Mid Atlantic
Feedback via Email Phone: 1.248.848.3800
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:
SP74-01
Date:
August 1, 1982
Author(s):
Wate T. Bakker
Publication:
Symposium Papers
Volume:
74
Abstract:
Recent research on refractory concretes for use in energy conversion applications has provided data, useful in other areas. It is shown that refractory concretes, especially those containing a calcined fireclay aggregate, are very tolerant to environments, generally considered corrosive, such as gases containing CO, CO2, H2, H2S and steam at high pressures. Even when the hydrated calcium aluminates are decomposed and some of the CaO is leached out, are fractory with acceptable physical properties remains. In many cases the strength of the material increases during service. Improved design methods for refractory concrete were also developed. A computer program to calculate heat losses from refractory concrete lined pressure vessels was developed and experimentally verified. This model takes into account the effect of cracks, anchor spacing and different gases in the pores of the concrete. The thermo mechanical behavior of refractory concrete was studied experimentally and modeled by computer. Design and materials selection criteria were developed. To minimize cracking, shrinkage and creep of the concrete should be low, preferably less than 0.1%. Anchor spacing should be wide and the anchors coated with a compliant or combustible material to avoid stress concentrations. Bond barriers between the vessel shell and the refractory and between various refractory layers are also beneficial. Long holding periods during initial heat up of the lining were found superfluous.
DOI:
10.14359/6390
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
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
SP74-03
William A. Ellingson
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.
10.14359/6392
SP74
Editor: David R. Lankard / Sponsored by: ACI Committee 547
Proceedings of the second ACI sponsored Refractory Concrete Symposium. Ten papers are presented. Topics include recent advances in refractory concrete technology; problems and solutions in using these materials as liners in coal gasification equipment, aluminum melting and holding, refining and petrochemical operations, and steelmaking; nondestructive testing and evaluation; and repair techniques. Note: The individual papers are also available as .pdf downloads.. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP74
10.14359/14126
Results Per Page 5 10 15 20 25 50 100