• Title, Summary, Keyword: fiber glass pipe

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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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Improvement of strength and prevention of twist strain in sewer pipe using glass fiber and twist prevention band (유리 섬유와 뒤틀림 방지 밴드를 이용한 하수관거의 강도 및 뒤틀림 개선 방안 연구)

  • Hong, Seok In;Im, Jiyeol;Gil, Kyungik
    • Journal of Wetlands Research
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    • v.19 no.1
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    • pp.63-68
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    • 2017
  • Maintenance of sewer pipe process sewer pipe repairing process is necessary for deterioration of sewer pipe. In this research, analysis on performance (strength and twist strain) of eco-friendly and even expanded liner process using glass fiber and twist prevention band. As a results, tensile strength, bending strength and failure load is increased after the sewer pipe repairing process than advanced research results. And sewer pipe after the this process obtained advantage of prevention of twist strain and economic. After the this research, sewer pipe repairing process using glass fiber and twist prevention band could be suggest the eco-friendly and effective sewer pipe repairing process.

Elastic Behavior Characteristics of GFRP Pipes Reinforced Ribs (리브로 보강된 GFRP 관로의 탄성 좌굴거동 특성)

  • Han, Taek Hee;Seo, Joo Hyung;Youm, Eung Jun;Kang, Young Jong
    • Journal of Korean Society of Steel Construction
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    • v.18 no.6
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    • pp.737-746
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    • 2006
  • The elastic buckling strength of a Glass Fiber Reinforced Plastic (GFRP) pipe reinforced with ribs was evaluated. The height and thickness of a rib and the spacing between two adjacent ribs were considered as factors affecting the buckling strength of the pipe. And also, the ratio of the longitudinal stiffness and transverse stiffness was considered as the parameter affecting the buckling strength as the GFRP is orthotropic material. Buckling strengths of various GFRP pipe models with different shapes and stiffness ratios were evaluated by FE analyses and a formula to estimate the elastic buckling strength of a rib-reinforced pipe made of orthotropic material was suggested from the regression with the results from the FE analysis. Analytical results show that a rib-reinforced pipe has a buckling strength superior to a general flat pipe and the suggested formula estimates accurate buckling strength of the rib-reinforced pipe.

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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Development of Glass Fiber Composite Material to Extend the Life of Fly Ash Transport Pipe: Wear Test (비회 운송관의 수명연장을 위한 유리섬유 복합재의 개발: 내마모성 평가)

  • Jeong, Gyu-Sang;Chang, Yoon-Sang
    • Clean Technology
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    • v.15 no.1
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    • pp.16-22
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    • 2009
  • In this study, a fiber reinforced plastic (FRP) pipe with superior wear resistance was developed to replace the fly ash pipe of cast iron. Wear test was performed with various combinations of SiC filler and resin materials of unsaturated polyester, vinylester, epoxy, and phenol. Test results of ASTM D4060 showed the optimal combinations of resin, filler size, and resin/filler ratios. Test results of comparison between FRP and cast iron showed the possibility to replace cast iron pipe with the FRP pipe. Field test executed to compare the wear resistance between cast iron pipe and developed FRP pipe showed the superiority of the FRP pipe.

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Study of structural properties and development of high strength Cured-In-Place Pipe (CIPP) liner for sewer pipes using glass fiber (유리섬유를 이용한 하수관의 고강도 현장경화 비굴착 보수 공법 재료의 개발 및 물성 특성 연구)

  • Ji, Hyon Wook;Koo, Dan Daehyun;Yoo, Sung Soo;Kang, Jeong-Hee
    • Journal of Korean Society of Water and Wastewater
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    • v.34 no.2
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    • pp.149-159
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    • 2020
  • Cured-in-place-pipe(CIPP) is the most adopted trenchless application for sewer rehabilitation to extend the life of the existing sewer without compromising both direct construction and indirect social costs especially applied in the congested urban area. This technology is globally and domestically known to be the most suitable for partial and full deteriorated pipe structure rehabilitation in a sewer system. The typical design of CIPP requires a significant thickness of lining to support loading causing sewage flow interruption and increasing material cost. This paper presents development of a high strength glass fiber composite lining material for the CIPP application and structural test results. The test results exhibit that the new glass fiber composite lining material has 12 times of flexural strength, 6.2 times of flexural modulus, and 0.5 Creep Retention Factor. These test results can reduce lining design thickness 35% at minimum. Even though taking into consideration extra materials such as outer and inner films for actual field applications, the structural capacity of the composite material significantly increases and it reduces 20 percent or more line thickness as compared to the conventional CIPP. We expect that the newly developed CIPP lining material lowers material costs and minimizes flow capacity reduction, and fully replaceable to the conventional CIPP lining materials.

Verification of Applicability of Buried GFRP Pipe through Numerical Analysis (수치해석을 통한 지중매설된 GFRP관의 적용성 평가)

  • Kim, Hongtaek;Kwon, Hyukjoon;Yoon, Myungjune;Yoon, Soonjong;Han, Yeonjin
    • Journal of the Korean GEO-environmental Society
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    • v.11 no.8
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    • pp.73-82
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    • 2010
  • The GFRP(Glass-Fiber Reinforced Plastic) pipe is designed to behave safely against the external forces and to secure stability of deformation and settlements of pipe, since it is laid under the ground. In this study, the evaluation for the pressure stability was carried out by performing the laboratory experiments to figure out the mechanical properties of Glass-Fiber Reinforced Plastic pipe, take a theoretical approach, and suggest the mechanical properties necessary for the analysis and design of GFRP. Numerical analysis is also conducted to evaluate on the field application through the comparison concerning relations between deformation and differential settlement in the GFRP and hume pipes when all and half sections are under the surcharge load.

Development of the Smart Concrete Appling Cross Stitch (크로스 스티치를 응용한 스마트 콘크리트의 개발)

  • Kim Ie-Sung;Kim Wha-Jung
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.168-171
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    • 2004
  • If a research trend present in and outside the country is often seen, the structure measurement method of having used PZT and the optical fiber (FBG) will be the actual condition which has accomplished the stock. In order to manage such cracks, time, efforts and expense are required. Such a method has many difficulties in application of a structure by the difficult problem of the measurement range, and the expensive sensor price. Progressive cracks were generated by fracture of glass pipe sensor. Moreover, the experiment which can detect damage propriety by external Light Emitting Diode by damaging a glass pipe by load change with the application of switch using strain gage of a glass pipe was conducted.

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Mechanical Property of Polymer mortar Pipes (폴리머 모르터 원형관의 역학적 특성)

  • 연규석;함형길;김관호;김성순
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.256-260
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    • 1993
  • The circular pipe was developed using polymer mortar. Pipe (inside diameter=170 mm and length=1,000 mm was made to evaluate structural performance. The average failure load for the pipes which were reduced its thickness by 41% was 2,000 kg which was higher than that of conventional concrete pipe of the same size. Reinforcement using glass fiber fabric highly increased the failure load, up to 9,500 kg.

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A Study on the Behavior of Buried Flexible Pipes with Soil Condition (지반조건에 따른 지중매설 연성관의 거동에 관한 연구)

  • Lee, Hyoung-Kyu;Park, Joon-Seok
    • Journal of the Korean Geosynthetics Society
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    • v.13 no.1
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    • pp.33-40
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    • 2014
  • In general, pipes buried underground can be classified into either rigid or flexible pipe. Glass fiber reinforced thermosetting polymer plastic (GFRP) pipe can be considered as one of typical flexible pipes for which the soil-pipe structure interaction must be taked into account in the design. In this paper, we present the result of an investigation pertaining to the short-term and long-term behavior of buried GFRP pipe. The mechanical properties of the GFRP pipe produced in the domestic manufacturer are determined and the results are reported in this paper. In addition, Ring deflection is measured by the field tests and the finite element analysis. Also, the extrapolation using these techniques typically extends the trend from data gathered over a period of approximately 5,232 hours, to a prediction of the property at 50 years, which is the typical maximum extrapolation time. Therefore, it was investigated that the long-term ring deflection of GFRP pipe estimated by methods for Monod-type.