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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 13 Abstracts search results
Document:
SP61-12
Date:
August 1, 1979
Author(s):
Gajanan M. Sabnis, Gordon B. Baston, Antoine E. Naaman, and Ricardo P. Pama
Publication:
Symposium Papers
Volume:
61
Abstract:
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.
DOI:
10.14359/17381
SP61-01
Gajanan M. Sabnis
This is an introductory paper to the symposium and should be considered in conjunction with papers by Batson et al., and Romualdi presented in this volume. An attempt is made to review briefly the historical background and to create the stage for the symposium that ferrocement is a useful engineering material rather than a boat-build-ing material.
10.14359/6632
SP61-02
Gordon B. Batson, Gajanan M. Sabnis, and Antoine E. Naaman
This is a summary of the mechanical properties of ferrocement as a structural material based on the state-of-the-art report being prepared by ACI Committee 549, Ferrocement. The mechanics of ferrocement is very complex because of the almost infinite variety of size, geometry, fabrication methods, orientation, yield and ultmate stress of the steel wire mesh reinforcement available. The specific surface area of the wire mesh appears to correlate well with the first crack strength and the spacing and number of cracks. The tensile, flexural and compressive strengths depend on the orientation of the mesh, technique of fabricating the mesh and its ultimate strength. It appears that the conventional methods of analysis for reinforced concrete can be used to calculate the flexural strength of ferrocement. Ferrocement has superior impact properties, but its fatigue strength may limit the otherwise high allowable stresses to which it could be subjected. A design approach based on allowable crack width for service loads seems to be practical.
10.14359/6633
SP61-03
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.
10.14359/6634
SP61-04
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.
10.14359/6635
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