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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 1-10 of 13 Abstracts search results
August 1, 1979
Gajanan M. Sabnis, Gordon B. Baston, Antoine E. Naaman, and Ricardo P. Pama
The references listed in the following pages cover a good selection of research papers and applications of ferrocement. Being the first volume of its kind, a wide selection of papers is made to help the interested engineer identify his needs. . .Many references were provided from the bibliograpgy of International Ferrocement Information Center (IFIC), Bangkok, and are gratefully acknowledged.
James P. Romualdi
A review of the basic characteristics of ferrocement, as it is distinguished from conventionally reinforced concrete or fiber reinforced concrete, is made. Problems of definition and performance are discussed in light of needed design criteria and future research needs are outlined.
P. Srinivasa Rao and M. S. Mathews
This paper reports about the development and testing of ferrocement corrugated sheets. The results obtained warrant the following deductions. The sheets can be cast with the minimum of equipment and supervision. While the strength of the ferrocement sheet tested is half that of asbestos sheets, the strength to cost ratio approaches the same value. Unlike asbestos sheets, ferrocement sheets exhibit very large deflections before failure. Special tools are required for cutting and drilling holes in ferrocement sheets.
The ferrocement applications described in this paper, developed by the Universidad Autonoma Metropolitana (UAM) and Instituto Politecnico National (IPN) of Mexico City, have been used with good results in different towns and slum areas, through a self-help construction program for low cost housing. Each of these applications presents an economical and practical solution for improving the physical living standards of people in developing countries.
A. G. Madhava Rao, D. S. Ramchandra
Murthy, R. Jayaraman, and G. Paul Joseph
Application of ferrocement in housing is presented here using local unskilled supervised labor and available materials in parts of India. The report is based on the large housing project partially supported by World Bank. In the design of Service Modules, two alternate schemes are proposed: one, using conventional brick walls and in-site or precast concrete roofing and the second, with a prefabricated service modules using ferrocement. Cost comparison between the two approaches is also given along with details of investigation using second alternative.
Z. Raichvarger and M. Raphael
The influence of grading and maximum size of natural quartz sands on the workability of mortars was studied. Both the grading and fineness modulus were found to affect the water requirement. Graphs are presented for the effect of grading, specific surface of sand and cement content on water requirement in mortars made with sands of maximum size 2.4 and 1.2 mm, respectively, and grading zones are proposed for these sands. Optimal sand composition was also found for fine sand with maximum size 0.6 mm.
S. P. Shah
Although some practical specifications are available for the construction of ferrocement boats, to the best of the author's knowledge no technical specifications for the construction of ferro-cement structures have yet been published. Specifications are essential if the use of ferrocement is to become widely accepted and if the gap between the "try and see what happens" approach and advanced research results is to be reduced. Based on 1) tests at the University of Illinois at Chicago Circle of model pressurized ferrocement water tanks where cracking and leakage characteristics were studied, 2) the experience in ferrocement and knowledge of its mechanical behavior and 3) an extensive survey of ferrocement related literature where some forms of specifications or recommendations were found and analyzed, the author has developed tentative recommendations for the construction of ferrocement water tanks. Although these recommendations are written specifically for water tanks, they may be used either as a model for other types of ferro-cement structures or as part of a more general and complete specification document on ferrocement.
Maurice Atcheson and Douglas Alexander
Variations in the form and use of conventional ferrocement made with plain mortar are limited by the requirement for fine meshes to control concrete cracking. If fibrous mortar is used, the steel wire fibers assist in distributing cracks and use can be made of much heavier meshes woven or loomed from high tensile wire. The outcome is a high strength material for which flexural properties can be designed and predicted with some accuracy, and which offers improved energy absorption and impact loading properties.
Ricardo P. Pama, Vorachai Intaragumhaeng,
and Bishwendu K. Paul
A theoretical model is presented to predict the width and spacing of cracks in ferrocement elements in tension. A parametric study was also conducted to study the influence of parameters such as bond stress, volume of reinforcement, size of reinforcement, properties of mortar and reinforcement on the width and spacing of cracks. The theoretical results indicate that the spacing and width of cracks are significantly affected by bond stress, diameter and volume of reinforcement. An experimental investigation was conducted on ferrocement specimens in tension with varying steel content and the results obtained are shown to be in agreement with theoretically predicted values. Practical guidelines are suggested for the control of tensile cracks in ferrocement elements.
Antoine E. Naaman
One of the distinguishing features of ferrocement as compared to reinforced concrete is the larger number of finer cracks for the same stresses in the steel reinforcement. Designing ferrocement structures to satisfy recommended serviceability criteria in a manner similar to the design of reinforced concrete structures is a logical and rational approach to follow. Serviceability is greatly dependent on cracking and crack width under working load conditions. Thus the prediction of crack widths (average and/or maximum) is an important consideration in design. This paper is based on a number of recent investigations on the cracking of ferrocement elements: they include tests on flexural beams under static and fatigue loadings, tests on ferrocement prisms with and without transverse reinforcement subjected to direct tensile loads, and tests on internally pressurized model ferrocement cylindrical water tanks. The following aspects of cracking are clarified for both flexure and tension: cracking behavior; influencing parameters; observed variations of crack widths; crack width predictions and suggested design approach.
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