| Experimental study on behaviors of polypropylene fibrous concrete beams |
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| 作者姓名： | SUJI D. NATESAN S. C. MURUGESAN R. |
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| 作者单位： | [1]Sathyabama Institute of Science and Technology, Chennai, Tamil Nadu, India [2]VLB, Janakiammal College of Engineering and Technology, Coimbatore, Tamil Nadu, India [3]Go jan School of Business and Technology, Red Hills Chennai, Tamil Nadu, India |
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| 摘 要： | Synthetic fibers made from nylon or polypropylene have gained application when loose and woven into geo textile form although no information on the matrix＇s mechanical performance is obtained so that more understanding of their structural contribution to resist cracking can be determined. This paper presents the results of an experimental investigation to determine the performance characteristics of concrete reinforced with a polypropylene structural fiber. In this investigation ＂Fiber mesh＂ brand of fibers manufactured by SL Concrete System, Tennessee, USA and marketed by M/S Millennium Building System, Inc., Bangalore, India are used. The lengths of the fibers used were 24 mm. Fiber dosages used were 0.9, 1.8, 2.7 kg/m^3. A total of three mixtures, one for each fiber dosage were made. A standard slump cone test was conducted on the fresh concrete mix with and without fibers to determine the workability of the mix. The test program included the evaluation of hardened concrete properties such as compressive, split tensile, modulus of rupture and flexural strengths. The increase in compressive strength is about 36.25%, 26.20%, and 23.75% respectively that of plain concrete. This increase in strength was directly proportional to amount of fibers present in the mix. The increase in flexural strength for Mixes I-III is about 21%, 16.6%, and 23% respectively that of plain concrete specimens. An experimental investigation was also made to study the behaviors of reinforced fibers concrete beams （with longitudinal reinforcements） under two-point loading. The deflection and crack patterns were also studied. The improvements in strength and ductility characteristics were discussed.
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| 关 键 词： | 纤维 钢筋 混凝土 机械性能 |
| 收稿时间： | 19 December 2006 |
| 修稿时间： | 2006-12-192007-03-05 |
Experimental study on behaviors of polypropylene fibrous concrete beams |
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| SUJI D. NATESAN S. C. MURUGESAN R..Experimental study on behaviors of polypropylene fibrous concrete beams[J].Journal of Zhejiang University Science,2007,8(7):1101-1109. |
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| Authors: | Suji D Natesan S C Murugesan R |
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| Institution: | (1) Sathyabama Institute of Science and Technology, Chennai, Tamil Nadu, India;(2) VLB, Janakiammal College of Engineering and Technology, Coimbatore, Tamil Nadu, India;(3) Gojan School of Business and Technology, Red Hills Chennai, Tamil Nadu, India |
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| Abstract: | Synthetic fibers made from nylon or polypropylene have gained application when loose and woven into geo textile form although
no information on the matrix’s mechanical performance is obtained so that more understanding of their structural contribution
to resist cracking can be determined. This paper presents the results of an experimental investigation to determine the performance
characteristics of concrete reinforced with a polypropylene structural fiber. In this investigation “Fiber mesh” brand of
fibers manufactured by SL Concrete System, Tennessee, USA and marketed by M/S Millennium Building System, Inc., Bangalore,
India are used. The lengths of the fibers used were 24 mm. Fiber dosages used were 0.9, 1.8, 2.7 kg/m3. A total of three mixtures, one for each fiber dosage were made. A standard slump cone test was conducted on the fresh concrete
mix with and without fibers to determine the workability of the mix. The test program included the evaluation of hardened
concrete properties such as compressive, split tensile, modulus of rupture and flexural strengths. The increase in compressive
strength is about 36.25%, 26.20%, and 23.75% respectively that of plain concrete. This increase in strength was directly proportional
to amount of fibers present in the mix. The increase in flexural strength for Mixes I∼III is about 21%, 16.6%, and 23% respectively
that of plain concrete specimens. An experimental investigation was also made to study the behaviors of reinforced fibers
concrete beams (with longitudinal reinforcements) under two-point loading. The deflection and crack patterns were also studied.
The improvements in strength and ductility characteristics were discussed.
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| Keywords: | Fiber Reinforcement Concrete Mechanical properties Polypropylene Fibre Reinforced Concrete (PFRC) |
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