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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
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
SP74-08
M.S. Crowley
Refining and petrochemical operations, such as fluid catalytic cracking units, naphtha reformers, incinerators, and furnaces subject refractory linings to a variety of aggressive actions, such as erosion, spalling, slagging, and chemical attack. A number of different types of monolithic refractory material are used to resist these actions. The types of refractory failure commonly experienced in refineries and petrochemical plants are discussed and methods of repairing or replacing the deteriorated areas are outlined. The effect of placement techniques, curing conditions, and start up procedures on the serviceability of repaired sections is also discussed.
10.14359/6397
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
SP74-10
I. Leon Glassgold
The introduction describes the types of materials used in refractory linings, their constituent ingredients and general properties. A brief history is presented with the problems and procedures attendant to the installation and use of various refractory materials. This is followed by an analysis of failure mechanisms with an overview of repair methods, including a description of available hot and cold techniques for the various repair alternatives. The need for careful surface preparation is emphasized, while anchoring and bonding devices are described. Choosing the appropriate repair material is also highlighted. Miscellaneous details covering joints, curing, drying and heatup and their importance in achieving a successful repair are discussed. A detailed description of proper repair procedures, including shotcreting, casting and guncasting, among others, is presented with particular emphasis being placed on the methods available for both plastic and castable requirements. Qua1ity Contro1 of the entire repair procedure and the methods of testing in use at present are assessed.
10.14359/17463
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
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