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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:
SP146-05
Date:
June 1, 1994
Author(s):
R. Siddique and J. Venkataramana
Publication:
Symposium Papers
Volume:
146
Abstract:
Thin natural fiber reinforced concrete sheets and tiles can be an inexpensive, attractive alternative to conventional roofing materials such as corrugated aluminum sheets, which are costly and energy-intensive in their production. Further production of such sheets may be done through intermediate technology, which does not rely much on heavy machinery and skilled labor. The present work aims at determining the suitability of San fiber, available in the Rjasthan state of India, for manufacturing thin fiber reinforced cement concrete sheets that can be used as roofing and paving tiles. For this purpose, 300 x 300 x 300-mm sheets, reinforced with randomly distributed discontinuous fibers, were tested for static load-carrying capacity and impact strength. The following conclusions are drawn, based on comparison with unreinforced cement concrete sheets. San fiber can be effectively used as a reinforcing material for sheets. Chopped fibers improve ductility, and impact strength is improved by about 23 to 29 percent, compared to unreinforced sheets. Overall indications are that San fiber can be used in the production of cost-effective roofing and paving material, compared to concrete reinforced with costlier fibers, such as steel.
DOI:
10.14359/4616
SP146-03
P. Soroushian, Z. Shah, and S. Marikunte
Potential of wastepaper fibers for the reinforcement of thin-sheet cement products was investigated. The slurry-dewatering method followed by pressing was used to manufacture the products. The fiber reinforcement conditions, matrix mix composition, and processing variable were optimized through experimental studies and statistical analyses based on fractional factorial design of experiments and analyses of variance of results. The results are indicative of strong potentials for the recycling of wastepaper for the reinforcement of thin cement products.
10.14359/4615
SP146-01
D. M. Gale
Since the turn of the century, thin-section asbestos-cement sheet and pipe products have been manufactured. Health and environmental concerns regarding the use of asbestos have led to a worldwide search for alternative fibers. Paper reviews the state of the art in using synthetic fibers to replace asbestos in fiber-cement products.
10.14359/4614
SP146-10
J. D. Worner and M. Muller
A methodology is presented that allows calculation of plain and fiber reinforced concrete for moments and normal forces. The developed procedure is a simple method to derive the internal forces, crack width, effective stiffness, and toughness. The basis for verification of the proposed analytical procedure comprises broad parametric experimental studies that include variations of the fiber diameter, fiber length, fiber content, and depth of the specimen. Interaction diagrams are given for practical use.
10.14359/4591
SP146-08
H. Hammooud and A. E. Naaman
An experimental program was carried out to investigate the behavior of ferrocement bolted moment-resisting joints. Eighteen ferrocement moment joints and four control ferrocement plates were tested under third-point flexural loading. The moment joints were fabricated by joining two L-shaped ferrocement elements with bolts. The parameters investigated were the number of mesh layers, the corner distance of the first bolt, the number of bolts, and the moment modes (closing corner and opening corner modes). Results describing the load-deformation response as well as the failure mode are presented. As expected, the joints failed by premature cracking along the corner section of the L-shaped elements. The bending capacity of the joint ranged from 36 to 90 percent of that of the control plates, depending on the test parameters. The joint performance was improved by more than 50 percent when a fillet was added, and the failure crack was moved from the corner to one of the legs. The fillet was more effective for the elements subjected to the opening mode moment than the closing mode moment.
10.14359/4590
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