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Post-crack flexural performance of high strength fiber-reinforced-concrete with latexmodification
In this paper, a kind of commercial styrene butadiene latex was used to produce a concrete matrix with a compressive strength ranging from 65 MPa to 85 MPa. One deformed steel fiber and two synthetic fibers (a polypropylene and a fiber blended with polypropylene and polyethylene) were incorporated to optimize a high performance concrete in terms of flexural toughness. Results show that synergistic effects between the fibers and the latex were observed over a wider range of deflections, but steel fibers appeared to be more compatible than the synthetic fibers in the latex modified concrete in terms of both load-carrying capacity and toughness. Based on the analysis of flexural toughness following the post crack strength (PCS method) procedure, it is concluded that there exist optimum latex dosages for polymer-modified fiber reinforced concrete (PM-FRC), and that the high performance composite (PM-SFRC, steel fiber) could be a promising material for both structural and repair purposes. Steel fibers appeared to be more effective in increasing the load-carrying capacity than synthetic fibers. The effectiveness of the fibers may be ranked as the following order: SF fiber > PPN fiber > HPP fiber, in both plain concrete and PMC matrix. Based on the analysis of the post crack strength (PCS method), it was found that there exists an optimum latex dosage for PM-FRC, typically 10% for PM-SFRC (steel fiber) and 5% to 10% for PM-SnFRC (synthetic fiber). Steel fibers appeared to be more compatible than synthetic fibers in the latex modified concrete in terms of both load-carrying capacity and toughness. The mix PM10-SF1.0 showed the best performance, and could be a promising material for both structural and repair purposes.
Post-crack flexural performance of high strength fiber-reinforced-concrete with latexmodification
In this paper, a kind of commercial styrene butadiene latex was used to produce a concrete matrix with a compressive strength ranging from 65 MPa to 85 MPa. One deformed steel fiber and two synthetic fibers (a polypropylene and a fiber blended with polypropylene and polyethylene) were incorporated to optimize a high performance concrete in terms of flexural toughness. Results show that synergistic effects between the fibers and the latex were observed over a wider range of deflections, but steel fibers appeared to be more compatible than the synthetic fibers in the latex modified concrete in terms of both load-carrying capacity and toughness. Based on the analysis of flexural toughness following the post crack strength (PCS method) procedure, it is concluded that there exist optimum latex dosages for polymer-modified fiber reinforced concrete (PM-FRC), and that the high performance composite (PM-SFRC, steel fiber) could be a promising material for both structural and repair purposes. Steel fibers appeared to be more effective in increasing the load-carrying capacity than synthetic fibers. The effectiveness of the fibers may be ranked as the following order: SF fiber > PPN fiber > HPP fiber, in both plain concrete and PMC matrix. Based on the analysis of the post crack strength (PCS method), it was found that there exists an optimum latex dosage for PM-FRC, typically 10% for PM-SFRC (steel fiber) and 5% to 10% for PM-SnFRC (synthetic fiber). Steel fibers appeared to be more compatible than synthetic fibers in the latex modified concrete in terms of both load-carrying capacity and toughness. The mix PM10-SF1.0 showed the best performance, and could be a promising material for both structural and repair purposes.
Post-crack flexural performance of high strength fiber-reinforced-concrete with latexmodification
Xu, H. (author) / Mindess, S. (author) / Kazunori, F. (author)
2004
8 Seiten, 14 Bilder, 1 Tabelle, 12 Quellen
Conference paper
English
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