• Title/Summary/Keyword: waterproof

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Assessment of Evaluation by Hybrid Waterproof-Roof Barrier Layer for Green System on Artificial Ground (인공지반 녹화시스템 활용을 위한 일체형 방수·방근 시트의 성능평가)

  • Oh, Chang-Won;Hong, Jong-Chul;Park, Ki-Bong
    • Journal of the Korea Institute of Building Construction
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    • v.15 no.4
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    • pp.391-396
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    • 2015
  • The demands about eco friendly space are increased as buildings are denser in downtown, and green system on the roof and the artificial ground are widely being applied. The construction of green system applies a waterproof layer, a root barrier and a protection concrete layer. Assembly of these many layers leads to a long construction term, and cause many defects. This study is to evaluate one layer-hybrid sheet which gets waterproof and root barrier performance simultaneously, which is developed to use in the new green system. As results, the performances of physical properties, durability, waterproof and root barrier not only exceeded quality standards but also showed excellent durability. In addition, mock-up test would be proceed to certify long term performance.

A Study on the Status of Waterproof Pressure of Indoor Hydrant Proportioner by a survey (옥내소화전의 방수압 실측에 의한 실태조사 연구)

  • Choi, Kyu-Chool;Jeong, Sang
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2009.04a
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    • pp.255-263
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    • 2009
  • A indoor hydrant proportioner that is installed as fire extinction equipment when a fire breaks out in a building plays a vital role for a fire extinction at an early stage. The indoor waterproof hydrant proportioner installed currently can function in case of fire as fire extinction equipment only when it can maintain proper waterproof pressure meeting the standards stipulated in NFSC. The results of the survey on the waterproof pressure of the indoor hydrant proportioner installed in most buildings showed that the waterproof pressure installed inside the buildings was higher than the agreed level suggested by NFSC, which is very desirable state and is regarded as the results of fire facilities being maintained and managed by regular fire inspections. It is thought that the safety management of fire extinction facilities should be kept up both regularly and steadily through TAB.

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Dynamic response and waterproof property of tunnel segmental lining subjected to earthquake action

  • Yan, Qixiang;Bao, Rui;Chen, Hang;Li, Binjia;Chen, Wenyu;Dai, Yongwen;Zhou, Hongyuan
    • Earthquakes and Structures
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    • v.17 no.4
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    • pp.411-424
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    • 2019
  • In this study, a numerical model of a shield tunnel with an assembled segmental lining was built. The seismic response of the segmental lining of the section of the shield tunnel in Line 1 of the Chengdu Metro is analyzed as it passes through the interface of sand-cobble and mudstone layers. To do so, the node-stress seismic-motion input method was used to input the seismic motion measured during the 2008 Wenchuan earthquake, and the joint openings and dislocations associated with the earthquake action were obtained. With reference to the Ethylene-Propylene-Diene Monomer (EPDM) sealing gaskets used in the shield tunnels in the Chengdu Metro, numerical simulation was applied to analyze the contact pressure along the seepage paths and the waterproof property under different joint openings and dislocations. A laboratory test on the elastic sealing gasket was also conducted to study its waterproof property. The test results accord well with the numerical results and the occurrence of water seepage in the section of the shield tunnel in Line 1 of the Chengdu Metro during the 2008 Wenchuan earthquake was verified. These research results demonstrate the deformation of segmental joint under earthquake, also demonstrate the relationship between segmental joint deformation and waterproof property.

A Study on Application of Exposure System using Waterproofing Sheets of Synthetic Polymer for Rooftop (옥상용 합성고분자 시트를 애용한 지붕노출 시스템 적용에 관한 연구)

  • Lee Sang Su;Kim Su-Ryon;Kwak Kyu-Sung;Oh Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.05a
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    • pp.179-183
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    • 2005
  • In apply roof waterproof system using of synthetic high polymer sheet for rooftop measure physical performance (tension$\cdot$tearing ability, temperature relativity, heating stretch performance, junction performance, wind resistance test) by various test environment condition waterproof test of structure and performance of construction work aspect, present suitable form of construction work under these environment. Also, wish to improve durability of concrete structure as that examine in priority about adhesion method and joint junction method with waterproof out surface, and present new direction about roof system application of waterproofing method for rooftop.

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A study on the heat insulation performance of vapor penetration-insulate complex waterproofing system. (수증기 투과형 단열 복합 방수 시스템의 단열 성능에 관한 연구)

  • Choi, Su-Young;An, Ki-Won;Jang, Duk-Bae;Kim, Jong-Phil;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.10a
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    • pp.62-63
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    • 2016
  • In addition to the waterproof sheet waterproof objectives that apply to the building roof it is being constructed, including a complex such as insulation performance, root-resistance. However, thermal insulation of the composite waterproofing sheet is an insulating effect a wide variety depending on the specific construction -specific, material and even the effect is this part of the test to the generation when insignificant compared to each other a number of roof insulation effect of the insulation composite waterproof sheet that is currently in effect analysis.

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Evaluation on Performance of Penetrative Water-repellent for Durability Progress of Concrete Structure (콘크리트 구조물의 내구성 증진을 위한 침투성 발수제의 성능평가)

  • Jang, Suk-Hwan;Woo, Jong-Tae;Nam, Yong-Hyuk;Kim, Seong-Soo
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.7 no.1
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    • pp.289-296
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    • 2003
  • The evaluation on performance of gel type penetrative water-repellent for durability progress of concrete structure has carried out in this study. And liquid type waterproof agents have been estimated with same method. Also normal concrete that was not applied water-repellent and waterproof agents have been estimated. As results, the penetrative depth of gel type water-repellent were deeper than that of liquid type waterproof agents and those were superior to these in physical and durable performance.

A Study on the Development and Estimation of Waterproof Outlet for Low Voltage (저압용 방수 콘센트의 개발 및 평가에 관한 연구)

  • Choi, Chung-Seog;Kim, Chang-Soung
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.57 no.2
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    • pp.181-185
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    • 2008
  • In this paper, we investigates accident actual conditions of electric outlet for low voltage that is used into interior and clear hazardous factor. Electric outlet for general can know that melting of socket-outlet and carbonization of support occur if a contaminant becomes burnout because is flowed in. Existent outlet consists of structure that special quality is good but inflow of a contaminant is easy when is dry. But, waterproof outlet passes silicon layer and have connected structure plug. As developed outlet covers whole surface and back side, interval was shut. Safety pin of developed outlet was established to operate to vertical direction. Therefore, we estimate that contribute on prevention of electrical disaster if use developed outlet to a restaurant, a laundry, a laboratory etc.

A study on the External Insulation and Waterproof Method of Rooftop (옥상부 외단열 및 외방수 공법 제안에 관한 기초연구)

  • Jang, Dae-Hee
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.05a
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    • pp.137-138
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    • 2019
  • To overcome the limitation in relation to thermal insulator's selection and installation method that is suitable for exterior insulation and waterproof construction methods, a production basis of thermal insulators of which manufacturing knowhow is held by companies was ensured and future-oriented construction methods to adopt new materials were applied. Performance verification was conducted through performance and mock-up tests of thermal transmittance on the cross sections where the flexible insulators were applied based on the improved prototype and performance data were obtained. To overcome the biggest drawbacks (walking feeling and damage etc.) in the exterior insulation and waterproof construction method, inserting a protective layer between thermal insulator and water-proof layer was proposed, and polypropylene corrugated cardboards.

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Improvement of Watertightness Evaluation Method in Waterproof Membrane (복합계 멤브레인 방수층의 수밀성 시험 평가방법 개선방안 연구)

  • Kim, Meong-Ji;Seon, Yun-Suk;Kim, Soo-Yeon;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.11a
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    • pp.50-51
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    • 2018
  • Although the introduction of new materials and new construction methods and overseas materials has become more active due to the diversification of the construction market, the quality standards of waterproofing methods in Korea are insufficient. In particular, the quality control standard is applied to the KS F 2622:08 (Membrane Waterproofing layer performance test method), which is the existing standard, to prepare standards for quality control of waterproof materials, which is increased in Korea.

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Sheet Jointing Method of the Roof Exposed Hybrid Waterproofing Using the Bump-type Joint Reinforcement (돌기형 접합 보강재를 이용한 옥상 노출 복합방수의 조인트 시공방법에 관한 연구)

  • Kim, Meong-Ji;An, Ki-Won;Kim, Dong-Chun;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.11a
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    • pp.147-148
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    • 2018
  • Seat waterproofing materials applied to the roof of a building concrete structure inevitably produce joints and are applied with opposite dam joints or overlapping joints depending on the waterproof material applied to the top of the sheet. In this case, the joint performance is determined by the material at the top, rather than by the superimposed joint. In order to solve this problem, various reinforcements have been used to apply to the connecting parts of the opposite dam, but the problem of attachment between different materials or the lack of reinforcement of the joint tape has not been solved. Therefore, for the purpose of securing tensile performance to the joints, this study is used as a reinforcement for the joints of PP materials with high tensile performance and as a reinforcement for nylon materials.

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