• Title/Summary/Keyword: Water leakage Repair

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Analysis of Flow and Economic Benefit Through Water Leakage Detection and Repair (누수탐사에 의한 유량분석 및 보수의 경제적 효과)

  • Lee, Seung-Chul;Lee, Sang-Il
    • Journal of Korean Society of Water and Wastewater
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    • v.19 no.1
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    • pp.8-15
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    • 2005
  • Field measurement data on water leakage are not readily available and it causes inaccurate assessment of water demand and poor supply planning. In this study, the procedure for leakage detection and unaccounted water calculation is proposed and applied to a city. The city has suffered from the significant amount of leak water and the financial loss as a result. Measurements were made for pressure and flow at 18 locations before and after the repair. Repair of the leakage increased pressure up to $2.0kgf/cm^2$ and saved 17.1% of water supply from distribution reservoirs. Monetary value of annual water savings for the entire city amounts to 1 billion won. It is believed that leakage detection and data analysis conducted in this study will contribute to the change of current practice and to the establishment of better water supply management system.

A Study on Guidelines for the Repair of Water-Leakage Cracks in Concrete Structures (콘크리트 구조물에 있어서 누수균열 보수를 위한 일반지침 제안 연구)

  • Oh, Sang-Keun
    • Journal of the Korea Institute of Building Construction
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    • v.10 no.6
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    • pp.97-107
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    • 2010
  • This study outlines a successful and effective plan for repairing water-leakage cracks in concrete structures. The lack of adequate solutions for water-leakage cracks often results in unnecessarily high repair costs, and as such this remains a problem that requires constant attention. Unfortunately, despite the availability of a vast number of different materials and methods, it is often difficult to attain a perfect waterproof sealing The reason for the difficulties in the repair of water-leakage cracks can be attributed to an insufficient knowledge and understanding of the negative factors (i.e., chemical and physical (mechanical) conditions) that cause water-leakage cracks, and of the properties of the repair materials and methods. In this study, guidelines and methods for the selection of adequate materials for the repair of water-leakage cracks in concrete structures were developed for countries that do not already have general guidelines on this subject, and for local regulatory authorities elsewhere.

A Study on the Application of Water Leakage Repair Materials through the Performance Evaluation of Polyacrylic Resin. (폴리아크릴 레진의 누수보수재 성능평가)

  • Cho, Il-Kyu;Yuh, Jae Hyung;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.11a
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    • pp.193-194
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    • 2018
  • In this study, various materials such as epoxy material, urethane material, cement material, and acrylic material are used to solve the water leakage occurring in underground structures. However, in the reality that the durability is insufficient and the effect is insufficient, it is aimed to improve the repairing effect by using acrylics. As a second study, it is confirmed that leachate can be used as a repair material by considering long time under water stability, elongation range test, fatigue resistance test, tube stability test, damage recovery performance ana temperature stability considering leakage environment for polyacrylate. In addition, this material is applied to Expansion Joint to perform leakage repair, and to verify the effect of repairing leakage by monitoring and visual observation of concrete humidification.

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A Study on the Performance Evaluation Method of Waterproofing-Seal as Leakage Cracks Repairing Material using on the Underground Structure (지하구조물에 적용하는 누수균열 보수용 방수씰의 성능평가 방법에 관한 연구)

  • Kwon Shi Won;Kwon Kee Joo;Lee Jong Yong;Oh Sang-Keun
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.05a
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    • pp.652-655
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    • 2004
  • In these days, repair materials for leakage cannot help but being taken in temporary way without any noticeable countermeasure. This kind of repair is socially criticized many times that is defective construction even if tills costs a lot. It was not arrange the standard for performance evaluation test method and quality maintenance for materials, even it has been used various injection repairing agent. In conclusion, We suggest that the test method for repair materials for leakage to establish the leakage repairing technology as increase of structure demand, so that the necessity of the establishment of the quality control standard and the performance testing way on the relevant water-proof seal is increasing a lot to regulate the water-proof technology and the leakage repair technology.

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A Study on the Construction Methods of Sealer of Injection Type for Leakage Maintenance for Water Leakage and Cracks in Concrete (콘크리트 누수균열의 유지관리를 위한 누수보수용 주입형 실링재 시공방법 연구)

  • Kwon Shi-Won;Oh Mi-Hyun;Kwak Kyu-Sung;Oh Sang-Keun
    • Journal of the Korea Institute of Building Construction
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    • v.6 no.1 s.19
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    • pp.87-91
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    • 2006
  • Since water leakage and cracks are not the source of serious problems such as long-term lowering of performance and durability of a stricture, including damages to operating facilities of a structure, damages to internal finishing materials, exhibition, and goods, and pollution of residential environment, they might have led to development of positive coping skills; however, an instant loss of lives or property due to earthquake, explosion, typhoon, or a fire was indeed neglected. In these days, repair materials for leakage cannot help but being taken in temporary way without any noticeable countermeasure. This kind of repair is socially criticized many times that is defective construction even if this costs a lot. It was not arrange the standard for construction methods of sealer of injection type for leakage maintenance, even it has been used various type of construction methods for leakage part. In conclusion, we suggest that the construction methods of sealer of injection type for leakage maintenance for leakage to establish the leakage repairing technology as increase of structure demand. Therefore, it would be possible to provide a stage-by-stage solution by developing systematic research activities among the industry, schools, and research institutes to spread maintenance management techniques globally through technical solution to water leakage and cracks, acquisition of structural safety with prolonged durability for life cycle, reduction of water leakage repair expense s, and so on.

Rapid microcement and glycidylacrylate a Case Study on the Improvement of Water Leakage Site Applied to Mixed-use (급결마이크로시멘트 및 글리시딜아크릴레이트를 복합 적용한 누수현장 보수사례)

  • Cho, Il-Kyu;Yuh, Jae Hyung;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.11a
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    • pp.241-242
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    • 2019
  • This technology is a water leak repair technology using composite materials of concrete structures that block leakage of structures by injecting rapid microcement into the face of underground concrete to block water and injecting flexible glycidylacrylate. Rapid micro cement system repair materials are mixed with fine fibers to improve the flexural sensitivity of the material and to form a layer that blocks stabilized water at the back of the structure by allowing rapid and tight spatial filling during injection with high cohesion The glycidylacrylate repair material can control the expansion rate, and the external stress also has the characteristic that the form of the material is not destroyed or separated, which can also be applied to vibrating induced structures that produce repetitive fatigue loads, and has an effective durability in saline, alkali, acid (chloric acid, sulfuric acid, nitric acid).

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Repair methods of water leakage cracks using crack self-healing technologies for subway tunnels (균열자기치유 기술을 적용한 지하철 터널 누수공사)

  • Ahn, Tae-Ho;Bang, Sin-Young;Kim, Jeong-Mi;Shim, Kwang-Bo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.15-16
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    • 2015
  • In this research, the application of repair methods of water leakage cracks using self-healing technologies for subway tunnels is presented. In order to apply crack self-healing water stop agents and quick setting agents in subway tunnels, laboratory and field tests were performed based on various previous researches. Especially, this study focused on development of crack repair materials and their new repair methods. Therefore, various repair materials were examined for new repair materials with self-healing capability applied to crack sealing method and to patching repair method.

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Effect of Evaluation before Site Application of Poly-acrylic Resin Leakage Repair Materials (폴리아크릴 레진 누수보수재의 선정평가 후 현장 적용에 따른 효과 분석)

  • Cho, Il-Kyu;An, Ki-Won;Song, Je-Young;Oh, Sang-Keun
    • Journal of the Regional Association of Architectural Institute of Korea
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    • v.20 no.6
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    • pp.55-61
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    • 2018
  • This study improved the water repair materials of the polyacrylic system applied to concrete structures by controlling expansion, strengthening water resistance, and improving cohesiveness. The improved polyacrylate repair materials were evaluated against the existing products to verify their performance and level of improvement, and applied on-site to the concrete structures that are leaking the improved water. The verification method measured the presence of water leaks and the moisture content of concrete inside. Moisture levels were measured for two months before and after material installation, and at least 0.8 - 1.7% of humidity was reduced after installing polyacrylic resin, and no leakage was found.

An experimental study about the water leakage structure of waterproofing layer performance demobilization method using of stick expansion type complex of flexible material (점착$\cdot$팽창성 유연형 복합소재를 이용한 누수구조물의 방수층 성능복원공법에 관한 실험적 연구)

  • Jang Hyok-Soo;Kang Hyo-Jin;Song Je-Young;Oh Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.11a
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    • pp.79-83
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    • 2005
  • In the reinforced concrete structure, Even if speak that water leakage occurrence is no problem to material, there is a lot of reasons construction factor, material damage by behavior structure, properties of matter change by years and water leakage part by environment condition. so, waterproofing technological consideration should be gone ahead. In this research, we will study about stick performance, concrete surface adhesive, damage and blow. we will check all things and test it. The stick expansion type complex of flexible material passed on result of standard. It is conducive to concrete of durability by waterproofing layer performance demobilitation technology on the water leakage structure for solution of problem and repair

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A Study on the Performance Evaluation Method of Waterproofing-Seal as Leakage Crack Repairing Material using in Wet Environment Structure (습윤 환경 구조물에 적용하는 누수균열 보수용 방수씰의 성능평가 방법에 관한 연구)

  • 강효진;우영제;강호경;오상근
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2002.11a
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    • pp.43-48
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    • 2002
  • Since the basement building like the communication hole and etc. is built under the ground where it is pressed by the water, the leakage happens due to the dried-shrinking crack, the sinking crack, the creation of the work-joint of the building and etc. caused by the character of the material and construction way of the reinforced concrete building. Especially, a lot of repair for the leakage cannot help but being taken in temporary way without any noticeable countermeasure. Therefore, this kind of repair is socially criticized many times that this is defective construction even if this costs a lot. The fundamental reason of the above mentioned symptoms can be found in the creation of the work-joint caused by the character of the concrete building, the limitation of the physical performance of the existing water-proof and repair material, the limitation of the construction, the limitation of the physical sustaining performance of the concrete building, the limitation(heat-injury, deterioration) of the constancy of the durability caused by aging and etc. Therefore, in this study, we would like to present the better understanding on the water-proof seal relating to the application at the spot and its test evaluation related data since the necessity of the establishment of the quality control standard and the performance testing way on the relevant water-proof seal is rising a lot to regulate the water-proof technology and the leakage repair technology in accordance with the growth of the demand on the facility.

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