• Title, Summary, Keyword: fiber reinforced polymer

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Engineering Properties of Carbon Fiber and Glass Fiber Reinforced Recycled Polymer Concrete (탄소섬유 및 유리섬유로 보강한 재생 폴리머 콘크리트의 공학적 특성)

  • Noh, Jin Yong;Sung, Chan Yong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.58 no.3
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    • pp.21-27
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    • 2016
  • This study was performed to evaluate engineering properties of carbon and glass fiber reinforced recycled polymer concrete. Fiber reinforced recycled polymer concrete were used recycled aggregate as coarse aggregate, natural aggregate as fine aggregate, $CaCO_3$ as filler, unsaturated polyester resin as binder, and carbon and glass fiber as fibers. The compressive and flexural strength of carbon fiber reinforced recycled polymer concrete were in the range of 68~81.5 MPa and 19.1~21.5 MPa at the curing 7days. Also, the compressive and flexural strength of glass fiber reinforced recycled polymer concrete were in the range of 69.4~85.1 MPa and 19~20.1 MPa at the curing 7days. Abrasion ratio of carbon and glass fiber reinforced recycled polymer concrete were decreased 21.6 % and 11.6 % by fiber content 0.9 %, respectively. After impact resistance test, drop numbers of initial and final fracture were increased with increase of fiber contents. Accordingly, carbon fiber and glass fiber reinforced recycled polymer concrete will greatly improve the hydraulic structures, underground utilities and agricultural structures.

Mechanical Behavior of Steel Fiber Reinforced Polymer-impregnated Concrete (강섬유보강 폴리머침투콘크리트의 기계적 성질에 관한 연구)

  • 변근주;송영철;정해성;정기영
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.156-161
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    • 1993
  • This paper is to develop steel fiber reinforced polymer-impregnated concrete(SFPIC) by impregnation polymer impregnate into hardened steel fiber reinforced concrete(SFRC). Steel fiber induces ductile behavior and polymer impregnant increase compressive strength. Steel fiber reinforced polymer-impregnated concrete specimens are prepared with fiber contents of 0.0, 1.5, 2.0, 2.5% and tested to obtain uni-axial and bi-axial compression strengths, tensile strength and flexural strength. The strength and mechanical properties of normal concrete, SFRC, SFPIC are compared.

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Plastic Shrinkage and Durability Characteristics of Fiber Reinforced Polymer-Modified Mortars (섬유보강 폴리머 시멘트 모르타르의 초기수축균열 및 내구특성)

  • Won Jong Pil;Jang Pil Sung;Kim Myeong Kyun;Kong Tae Woong
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.156-159
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    • 2004
  • The intention of this study is to reduce the plastic shrinkage of the polymer modified cement mortar using the PVA fiber. The durability of PVA fiber reinforced polymer cement mortar was also evaluated. The test results of PVA fiber reinforced polymer modified cement mortar were compared with plain polymer modified cement mortar(non-fiber). In conclusion, PVA fiber reinforced polymer modified cement mortar showed an ability to reduce the total crack area and maximum crack width significantly. Also. fiber reinforced polymer modified cement mortar show improved durability performance.

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Mechanical Behavior of Steel Fiber Reinforced Lightweight Polymer Concretese (강섬유보강 경량 폴리머 콘크리트의 역학적 거동)

  • Youn, Joon-No;Sung, Chan-Yong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.47 no.2
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    • pp.63-72
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    • 2005
  • In this study, the physical and mechanical properties of steel fiber reinforced lightweight polymer concrete were investigated experimentally with various steel fiber contents. All tests were performed at room temperature, and stress-strain curve and load-deflection curve were plotted up to failure. The unit weight of steel fiber reinforced lightweight polymer concrete was in the range of $1,020{\sim}1,160\;kg/m^3$, which was approximately $50\%$ of that of the ordinary polymer concrete, The compressive strength, splitting tensile strength, flexural toughness and flexural load-deflection curves after maximum load were shown with increase of steel fiber content. The stress-strain curves of steel fiber reinforced lightweight polymer concrete were bilinear in nature with a small transition zone, Based on these results, steel fiber reinforced lightweight polymer concrete can be widely applied to the polymer composite products.

Development of Bridge Expansion Joint for Fiber Reinforced Polymer Deck (FRP바닥판용 신축이음장치 개발)

  • Lee, Young-Ho;Park, Jong-Sup
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.2
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    • pp.348-353
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    • 2007
  • This paper presents design specifications and characteristics of bridge expansion joints to develop new type-joints in fiber reinforced polymer decks. Based on properties of the fiber reinforced polymer decks and fundamental process to calculate their expansion length, new expansion joints fur fiber reinforced polymer decks on typical steel or concrete girder are developed and proposed.

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Post-heating behavior of concrete beams reinforced with fiber reinforced polymer bars

  • Irshidat, Mohammad R.;Haddad, Rami H.;Almahmoud, Hanadi
    • Structural Engineering and Mechanics
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    • v.53 no.6
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    • pp.1253-1269
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    • 2015
  • The present paper investigates the post heating behavior of concrete beams reinforced with fiber reinforced polymer (FRP) bars, namely carbon fiber reinforced polymer (CFRP) bars and glass fiber reinforced polymer (GFRP) bars. Thirty rectangular concrete beams were prepared and cured for 28 days. Then, beams were either subjected (in duplicates) to elevated temperatures in the range (100 to $500^{\circ}C$) or left at room temperature before tested under four point loading for flexural response. Experimental results showed that beams, reinforced with CFRP and GFRP bars and subjected to temperatures below $300^{\circ}C$, showed better mechanical performance than that of corresponding ones with conventional reinforcing steel bars. The results also revealed that ultimate load capacity and stiffness pertaining to beams with FRP reinforcement decreased, yet their ultimate deflection and toughness increased with higher temperatures. All beams reinforced with FRP materials, except those post-heated to $500^{\circ}C$, failed by concrete crushing followed by tension failure of FRP bars.

Characteristics of Fracture Energy on Steel Fiber-Reinforced Lightweight Polymer Concrete

  • Youn, Joon-No;Sung, Chan-Yong
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.45 no.7
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    • pp.11-19
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    • 2003
  • In this study, unsaturated polyester resin, artificial lightweight coarse aggregate, artificial lightweight fine aggregate, heavy calcium carbonate and steel fiber were used to produce a steel fiber-reinforced lightweight polymer concrete with which mechanical properties were examined. Results of this experimental study showed that the flexural strength of unnotched steel fiber-reinforced lightweight polymer concrete increased from 8.61 to 13.96 MPa when mixing ratio of fiber content increased from 0 to 1.5%. Stress intensity factors($K_{IC}$) increased with increasing fiber content ratio while it did not increase with increasing notch ratio. Energy release rate ($G_{IC}$) turned out to depend upon the notch size, and it increased with increasing steel fiber content.

Structural Evaluation of Glass-fiber Reinforced 3-Layer Polymer Composite Pipe (GFRP 보강 폴리머 모르터 3중복합관의 구조적 특성)

  • Yeon, Kyu-Seok;Kwon, Yoon-Hwan;Ryu, Keun-Woo;Jin, Nan-Ji
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • pp.147-151
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    • 2001
  • This study was performed to evaluate the internal and external factors affecting external strength of the 3-layer polymer composite pipes made of polymer mortar and fiber-glass reinforced plastic. Twenty four sandwich type 3-layer polymer composite pipes were made of polymer mortar and fiber-glass reinforced plastic by centrifugal method. The objective of this study was to evaluate the effects the of polymer mortar thickness for and core fiber-glass contents per unit area on external strength of 3-layer polymer composite pipes. For the more economical and practical design of 3-layer polymer composite pipe, further study should be done for the various polymer mortar, fiber-glass and different ratio of the inside/outside FRP thickness.

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Structural Behavior of Glass-Fiber Reinforced Plastic Composite Pipes (유리섬유 강화플라스틱 복합관의 구조적 특성)

  • 연규석;김남길;조규우;김동준;최종윤;백종만
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.822-827
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    • 2003
  • This study was performed to evaluate the internal and external factors affecting external strength of the 3-layer polymer composite pipes made of polymer mortar and fiber-glass reinforced plastic. Twenty four sandwich type 3-layer polymer composite pipes were made of polymer mortar and fiber-glass reinforced plastic by centrifugal method. The objective of this study was to evaluate the effects the of polymer mortar thickness for and core fiber-glass contents per unit area on external strength of 3-layer polymer composite pipes. For the more economical and practical design of 3-layer polymer composite pipe, further study should be done for the various polymer mortar, fiber-glass and different ratio of the inside/outside FRP thickness.

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Flexural and Interfacial Bond Properties of Hybrid Steel/Glass Fiber Reinforced Polymer Composites Panel Gate with Steel Gate Surface Deformation for Improved Movable Weir (개량형 가동보에 적용하기 위한 하이브리드 강판/GFRP 패널 게이트의 강판게이트 표면형상에 따른 휨 및 계면 부착 특성 평가)

  • Kim, Ki Won;Kwon, Hyung Joong;Kim, Phil Sik;Park, Chan Gi
    • Journal of The Korean Society of Agricultural Engineers
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    • v.57 no.2
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    • pp.57-66
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    • 2015
  • The purpose of this study was to improved the durability of a improved movable weir by replacing the improved movable weir's metal gate with a hybrid steel/glass fiber reinforced polymer composites panel gate. Because the metal gate of a improved movable weir is always in contact with water, its service life is shortened by corrosion. This study made four type of hybrid steel/glass fiber reinforced polymer composites panel gate with different steel gate surface deformation (control, sand blast, scratch and hole), flexural. Fracture properties tests were performed depending on the steel gate surface deformation. According to the test results, the flexural behavior, flexural strength and fracture properties of hybrid steel/glass fiber reinforced polymer composites panel gate was affected by the steel panel gate surface deformation. Also, the sand blast type hybrid steel/glass fiber reinforced polymer composites panel gate shows vastly superior flexural and fracture performance compared to other types.