• 제목/요약/키워드: Repair Method

검색결과 1,620건 처리시간 0.032초

콘크리트 포장 부분단면보수 재파손 구간의 적정 보수 방안 (Re-Repair Method for Deterioration of Partial Depth Repair Section in Portland Cement Concrete Pavement)

  • 이용현;김현석;정원경;오한진;김형배
    • 한국도로학회논문집
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    • 제19권5호
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    • pp.33-42
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    • 2017
  • PURPOSES : The purpose of this study is to suggest the construction and quality control method for the re-repair of a deteriorated partial depth repair for sections of Portland cement concrete pavement. METHODS : An experimental construction was conducted to extend the repair width for removing an existing repair section. A removal method was used to ensure early performance for a deteriorated partial depth repair section. Bond strength and split tensile strength were measured at the near vertical interface layer between the existing pavement and repair material. The area was analyzed for various conditions such as the extended repair area and the removing method of the existing repair section. RESULTS : As a result of analysis of bond strength and split tensile strength, the bonding performance of a milling removed section was improved over a cutting and hand breaker removed section. The bond strength was analyzed to increase slightly as the extended repair width for removing the existing repair section increased. The split tensile strength did not show a clear relationship to an increased extended repair width of an existing removed repair section. CONCLUSIONS : The milling removal method should be applied in the removal of existing deteriorated partial depth repair sections. The extended repair width for a re-repair section should be wider than the existing partial depth repair with at least a 75-mm length and width for the bond strength and the split tensile strength.

철근콘크리트구조물 보수공법의 성능평가 방법 개발에 관한 연구 (A Study on the Development of Evaluation Method of Repair Performance for the Repair Method of Reinforced Concrete Structures)

  • 김용로;김효락;이도범;김무한
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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    • pp.203-206
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    • 2005
  • The purpose of this study is to develop the evaluation method of repair performance for the repair method of reinforced concrete structures deteriorated due to combined deterioration, its results are summarized as the follows. After investigating and analyzing the experimental data of this study and existing research, it is proposed the evaluation method on the repair performance for the repair method of reinforced concrete structures using evaluation method of reinforcing corrosion by combined deterioration accelerated test.

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교각구조물의 유지보수 (Maintenance & Repairs of pier Structure)

  • 김규린
    • 기술사
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    • 제34권1호
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    • pp.35-43
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    • 2001
  • This paper Is described for the maintenance and repair method for the pier structure currently under repair works in the Han river bridges. During the economic growth period from the year 1960 to 1980, our engineer was concentrated only for study of the construction method of bridge. We have neglected the importance for the maintenance & repair method of construction structure. Therefore this paper will give you some ideas of repair and maintenance method.

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콘크리트 보수 재료 효과 분석 및 공법기준관련 연구 (Study on the Inspection of Repairing Materials and Methods for Concrete Structures)

  • 김도겸;오광진;안상구;박정준
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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    • pp.317-320
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    • 2006
  • In this paper, in order to inspect effect of marketed repair materials, it inspected first the repair material through laboratory work by repair method. After we carry out laboratory work and choice the construction with ongoing deterioration to inspect performance of repair materials, we apply the repair materials there. This results will be make use of reference whenever selection of repair materials and repair method. Also which will be used basic data for repair construction code.

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Determination of the repair grout volume to fill voids in external post-tensioned tendons

  • Im, Seok Been;Hurlebaus, Stefan
    • Structural Engineering and Mechanics
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    • 제42권1호
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    • pp.25-38
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    • 2012
  • Recently, investigated failures of external post-tensioned (PT) tendons have called attention to the corrosion of strands in PT bridges, and the prevention of ongoing corrosion is required to secure their structural integrity. Since voids inside ducts can be a source for the ingress of water or deleterious chemicals, the vacuum grouting (VG) method and a volumeter for estimating amount of repair grouts were employed to fill voided ducts. However, the VG method is expensive and time-consuming for infield application because it requires an air-tight condition of entire ducts. Thus, latest research assessed three different repair grouting methods, and the pressure vacuum grouting (PVG) method was recommended in the field because it showed good filling capability in voided ducts and did not require an air-tight condition. Thus, a new method is required to estimate the volume of repair grouts because the PVG method is not applied in air-tight ducts. This research assesses the relationship between voided areas on ducts identified with soundings and required grout volume for repair using experimental results. The results show that the proposed equations and assumptions for estimating repair grout volume provide a sufficient amount of repair grouts for filling voided ducts.

대형매트기초의 관통균열 보수시 WATER JET을 이용한 천공과 저면보수에 관한 연구 (When mend piercing crack of large size mat basis, study of perforation and vottom repair that use water jet)

  • 박성우;한송수;이상헌;박찬규
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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    • pp.577-580
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    • 2003
  • Problem of repairing by boring is that it deteriorates stabelety and durability of structure by permeation of seawater from underneath after damage and repair of reinforcing rod regarding of spot. The purpose of this study is to improve the porblem by using the repair method of general boring to mend the of large mat basis. Direction of thes experiment is to apply the new repair material and the method to control the blazing fire factor caused by the crack from the foundation of large mat and also to estimate it's integrity. New method of construction is method of contruction that do speace scurity in vertical drilling and bottom useing water jet. New material used bantonite and rubberized asphalt. Test result existent repair method of construction large size mat basis perforation is difficult and reinforcing rod can be damaged coule there were a lot of problems with re-water leakage of crack repair region, but overcomes existent short coming by method that apply in this study.

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유·무기 복합재료를 이용한 새로운 균열 보수재료의 특성 (Properties of new crack repair materials using organic and inorganic composites)

  • 안태호;방신영;김경민;소광호
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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    • pp.228-229
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    • 2015
  • In this research, properties of new crack repair materials using organic and inorganic composites (OAI) were investigated under various crack conditions. Especially, this study aims to develop new composites repair materials as needed to follow the crack and its repair method. Crack repair methods such as injection method and surface treatment repair method using self-healing capability for the practical industrial application were examined in comparison with normal crack repair method as a epoxy injection. From these results, it was confirmed that the sealing and injection effects through the cracks from field tests could be improved by OAI.

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In-line Automatic defect repair method for TFT-LCD Production

  • Arai, Takeshi;Nakasu, N.;Yoshimura, K.;Edamura, T.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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    • pp.1036-1039
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    • 2009
  • We have developed an automated circuit defect repair method. We focused on the resist patterns on the circuit material layer of TFT substrates before the etching process. In this paper, we report on the repair method that utilizes the syringe system and the stability of the open defect repair process.

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균열 주입부의 비파괴 검사에 의한 주입효과 판정에 관한 연구 (Non-destructive Testing Methods to Evaluate the Effectiveness of Crack Repair Using Expoxy and Microcement)

  • 최홍식;이시우;이호범;송영철;방기성
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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    • pp.841-846
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    • 2002
  • Development on non-destructive testing methods were performed to evaluate the effectiveness of crack repair for test beams induced a crack. Cracked beams are repaired with expoxy and microcement, and then they are tested by two methods, the ultrasonic pulse velocity method and the transfer function method. It is proved that the ultrasonic pulse velocity method is very valid for the evaluation of the effectiveness on expoxy repair, and the transfer function method is very applicable to evaluate the effectiveness on microcement repair.

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에폭시 섬유판넬을 이용한 수중구조물의 단면보수시스템에 대한 성능평가 (Performance Evaluation of the Underwater Structure which used a Epoxy Panel)

  • 박준명;홍성남;박선규
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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    • pp.343-346
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    • 2003
  • Confirmation of a damage degree and repair about a damage part are very hard for an underwater structure. And quality control of a construction is very complicated even if repair work is carried out on a damaged structure because repair work is carried out in water. If repair work is carried out while a defect part of the structure which there is in water keeps dry state, a efficient of repair is maximized. However, as for the repair technology about an underwater structure, a systematic researcher is not enough because of the environmental trouble. And, as for the effect about repair method to be applied to a currently underwater structure, it is not certainly proved. In this study The repair work of an underwater structure damaged applied the method that used a fiber panel form work. And a efficient of structure repaired was evaluated.

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