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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 11 Abstracts search results
Document:
SP146
Date:
June 1, 1994
Author(s):
Editor: P. Balaguru
Publication:
Symposium Papers
Volume:
146
Abstract:
SP-146 Since the use of asbestos fibers is totally banned in the industrialized countries and discouraged in almost all countries, a large number of researchers around the world are working to obtain a replacement. Various forms of fabrics, meshes, and discrete fibers made of metal, mineral, polymeric, and naturally occurring materials have been investigated.
DOI:
10.14359/14186
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
SP146-03
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
SP146-05
R. Siddique and J. Venkataramana
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.
10.14359/4616
SP146-02
P. Balaguru
Results of an experimental investigation on the behavior of a cement composite reinforced with short (micro) fibers are presented. The primary response variable was flexural behavior measured in terms of modulus of rupture and toughness index. The independent variables were fiber content, addition of silica fume, cement, sand ratio, specimen size, and casting procedure. Most of the specimens were cast using a shotcreting process. The results indicate the following trends. The microfibers can be used to increase flexural strength in rich cement mortars. The fibers do not provide significant strength increase, but do provide improved ductility. The addition of silica fume improves the fiber performance. Fibers are more effective in thinner sections. The author believes that the properties of the composite can be considerably improved by removing the excess water and entrapped air by applying external pressure during the manufacturing process.
10.14359/4322
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