• Title/Summary/Keyword: roof-proofing

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A Study on the Defect Causes Type for Poly-Urethane Waterproofing in Roof (옥상 방수에 있어서 폴리우레탄 도막방수의 하자발생 유형에 관한 연구)

  • Shin, Hyung-John
    • Korean Journal of Construction Engineering and Management
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    • v.6 no.3 s.25
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    • pp.128-134
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    • 2005
  • Up to now, the various water proofing methods and materials have been developed. For the water proofing methods, poly-urethane membrane method is one of the commonly used and increase market share in water proofing industry due to it's many advantages. However, in spite of it's many advantages over other water proofing methods, water proofing defect occurs frequently. With this respect, the study investigate water proofing defect causes in roof water proofing. The study investigate 13 water proofing construction site in Sunchon city in oder to find urethane membrane defection causes and their type. As a results of the study, the followings are founded. 1) Among various water proofing defection causes, problems of water remain phenomenon due to surface horizontal level defect which occupy $25\;\%$ of total defect causes is the most commonly occur. 2) The second defect cause which occupy $15\;\%$ of total defect causes is the swell up phenomenon due to surface dry problem. For the prevention of water proofing defection in roof using urethane membrane, the followings are recommended. 1) Faultless surface treatment before using urethane membrane 2) Develop improved urethane membrane material 3) Improve urethane membrane construction technique

The Forecasting Model of the Repair Cost in Apartment Housing - Focused roof water proofing and Elevator work - (공동주택 공종별 수선비용 예측모델 연구 - 옥상방수 공사와 승강기 공사를 중심으로 -)

  • Lee, KangHee;Chae, ChangU
    • KIEAE Journal
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    • v.15 no.6
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    • pp.63-68
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    • 2015
  • Purpose: Most if buildings need various repair works for preventing or delaying the deterioration which gives rise to affect the living condition or function after constructed. Therefore, a long-term repair schedule should be planned and a repair cost is required. In this paper, it aimed at providing the statistical forecast model for a repair cost in roof water-proofing work and elevator work using statistical approach with three variables such as number of household, management area and a elapsed year. Data are collected in apartment housings which are located in Seoul area and conducted with interview and questionnaire sheet. Each analyzed work is divided into a partly work and fully work. Results of this study are shown that, first, the regression model takes a multiplying type like a Cobb-Douglas function and is changed into the log-linear type to include the three variable simultaneously. Second, the goodness-of-fit of the repair cost forecasting model has a good statistics in determinant's coefficient and Dubin-Watson value. Third, the management area is stronger factor than other the number of household and an elapsed year in roof water-proofing work and elevator work.

Current Status and Issues of Green Roof Technology in Korea (한국옥상녹화기술의 현황과 과제)

  • Yang, Byoung-E
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.7 no.4
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    • pp.1-7
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    • 2004
  • The purpose of the study is to review current status of green roof technology and to suggest the issues and solutions related with the technological problems of green roof in Korea. The scope of the study is limited to the extensive green roof which requires low maintenance. Technological issues related with green roof include soil, water proofing, water drain, vegetation and maintenance. Several solutions to invigorate green roof technology were suggested as follows; 1)implementation of technical standard for green roof and technology certification system, 2) development of suitable raw materials for green roof, 3) construction guidelines and uniform construction specification, 4) formulation of city ordinance for green roof, and 5) exchange program with foreign green roof organizations.

Compound waterproofing method of green roof using copper barrier sheet and recycled tire melting liquid waterproofing material that reinforced treatments are valve and glass fiber mesh. (알루미늄 판막과 유리섬유를 합지한 구리방근시트와 폐타이어 용융액상 도막방수재를 이용한 옥상녹화 복합방수공법)

  • Kim, Young chan;Cho, Il Kyu;choi, sung min;Oh, Sang Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2008.11a
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    • pp.173-178
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    • 2008
  • This is green roof bottom system which composed by aluminum valve and glass fiber together as major reinforcement, so the cooper sheet can have root proof, and using recycled tire gel-type membrane waterproofing system which dost not contains VOCs. The copper sheet reduce the plants' root growing, so it helpes to maintain the waterproofing layer and stability of root proofing. Gel type membrane waterproofing system can do waterproofing, stress dispersion, and reducing leakage expansion. So those two materials can help each other to make green roof bottom layer would have the stability and durability.

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A Standard Test Methods of Resistance to Root Penetration for Waterproofing and Rootproofing Membrane Using Green Roof System (인공지반녹화용 멤브레인 방수 및 방근재료의 방근성능 평가 방법 제안 연구)

  • Lee, Jung-Hoon;Seon, Yun-Suk;Kwak, Kyu Sung;Oh, Sang-Keu
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.11a
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    • pp.141-148
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    • 2009
  • The purpose of this paper is to propose a standard test methods of resistance to root penetration for waterproofing and rootproofing membrane using green roof system. Green roof system is considered to be an important subject in construction industry for green growth project. At the same time, we have to consider the counterplan for protection the damage of waterproofing layer and concrete substrate from the penetration of plant root. But many kinds of materials for protection from root penetration are using in construction field. But the performance of those materials is not clear, and there is not test methods for the evaluation of performance. So in this paper, based on the research results of 4 institutes during four years and foreign cases, we made a standard test methods of resistance to root penetration for waterproofing and rootproofing membrane using green roof system. This test method deals with about environmental condition of laboratory, experimental facilities, kinds of plant, specimen of test, management methods, evaluation duration and documents, etc.

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The changing characteristics of Material and Structure of Rural Housing in the aspect of Period and Region (지역별·시기별 농촌주택의 재료 및 구법 특징 변화 연구)

  • Bae, Woong-Kyoo;Joo, Dae-Khan;Jeong, Dong-Seop;Yun, Yong-Woo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.12
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    • pp.6504-6513
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    • 2013
  • The result can be summarized as follows. First, the following periodically changing characteristics were examined:roof form(gambrel/hipped-flat-gable), structure of roof and wall(wood-framed-cement masonry-RC-Light iron framed), roof material(thatched-tiled-slate-cement/steel sheet-asphalt/sandwich panel/mortar water-proofing), wall material(clay plaster/lime plastered-dressing tile/bricks-painting on the cement plastering-native stone dressing/siding/tile), fence material(masonry of stone and cement bricks), and courtyard materials(clay and concrete). Secondly, the regionally changing characteristics of those elements, rural housing structure, roof form, roof structure material, wall finishing material, fence and courtyard material in the outer space, differed according to the location of rural housing, i.e.north, middle, south region. The changing characteristics of both the roof structure and wall structure are similar to those of the three regions.

Performance Evaluation System for Construction Environment of the Unified Waterproofing-Root Resistance Membrane layer of the Green Roof System (인공지반 녹화용 방수방근 복합공법의 시공환경을 고려한 성능평가 시스템 연구)

  • Park, Chang-Hwa;Oh, Sang-Keun;Lim, Nam-Gi
    • Journal of the Korea Institute of Building Construction
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    • v.11 no.2
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    • pp.189-199
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    • 2011
  • Installation of a proper root barrier in a green roof system is very important in order to protect the concrete slab of roof and the root penetration in the waterproofing layer. To select the proper root barrier materials and methods, it is necessary to understand the environmental conditions affecting the waterproofing-root barrier system in green roof construction site. Therefore, we suggested as the environmental performance indexes four kinds of performance requirements; root penetration, chemical attack by chemical agent or fertilizer, load impact by soil depth and size of plant, and water pressure. The related four test methods were suggested for the inspection of these performance indexes. In this research, we could suggest for kinds of test methods as standard test methods to evaluate the environmental performance of waterproofing-root barrier for greening roof system.

The Characteristics of the Repair Cost Distribution in Apartment Housing

  • Lee, KangHee;Chae, ChangU
    • KIEAE Journal
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    • v.15 no.6
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    • pp.19-26
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    • 2015
  • Purpose: The repair would require to conserve and improve the building function and performance since built. Each household is responsible for maintaining the public facilities and paying the required cost. Therefore, it needs to get the tool or method to forecast the required cost in the future. Before the repair cost is provided, it needs to catch the repair cost distribution and provide the unit cost for the repair cycle. In this study, it aimed at providing the repair cost unit and analyzing the repair cost distribution in a roof proofing work, elevator work and building painting, which are divided into a fully work and partly change. Results of this study are shown that first, the average repair cost for roof proofing work is provided with $166.59{\times}10^3won/household$ and $1.59{\times}10^3won/m^2$ of a full change, $33.22{\times}10^3won/household$ and $0.33{\times}10^3won/m^2$ for a partly work. In addition, elevator work is $557.45{\times}10^3won/household$ and $5.38{\times}10^3won/m^2$ for a full change, $32.92{\times}10^3won/household$ and $0.56{\times}10^3won/m^2$ for a partly repair. Painting has a $304.48{\times}10^3won/household$ and $2.94{\times}10^3won/m^2$. Second, the distribution pattern of repair unit cost has a weibull-typed distribution which has a long tail to the right.

Assessment of roof waterproofing by pre-packaged polymer modified slurry (PPPMS) and bitumen

  • Iqbal, Safdar;Jehan, Beenish;Khan, Fasih Ahmed;Khan, Haris;Khan, Sarmad Ali
    • Advances in environmental research
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    • v.8 no.1
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    • pp.71-84
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    • 2019
  • Effective waterproofing of structures was a compulsory constraint to avoid leaks and dampness or humidity in walls, ceilings, roofs underground tank and underground room. Traditionally used methods of roof waterproofing were bitumen with tinny seared clay tiles are very troublesome, overwhelming time and involving high labor cost. These waterproofing methods are not allocation the purpose due to their intrinsic disadvantages. Prepackaged polymer modified slurries (PPPMS) are now attainment the vogue and easy to use, easily available in the market, cheaper in cost and more workable than the traditional methods of waterproofing. An experimental study has shown that prepackaged polymer modified slurries (PPPMS) are superior in cost and performance to as a roof water proof coatings. Bituminous coatings were mixed with water and different combination of prepackaged polymer modified slurries and primer respectively, to find optimum coverage underneath worst atmospheric conditions. Every specimen of different proportioned was applied on plane roofs and through the passage of time, their performance was checked, assessed and associated with each other. The roof of approximately 40000 ft2 area of prepackaged polymer modified slurries was used will give us hundred percent result (no water seepage or no water absorption) therefore no complaints as compare to roofs area of approximately 24000 ft2 bituminous coating was used for waterproofing they have shown the result of 30 to 40 percent water seepage. This result shows that prepackaged polymer modified slurries were two times cheaper than bituminous coating. Comparing an equal number of surfaces coated with a polymer modified prepackaged mortar and bitumen the prepackaged polymer modified slurries (PPPMS) showed excellent performance, ease of application and low bitumen coating cost.

A Study for Analyzing Life Cycle Cost of Membrane Water-proofing of Roof - Focused on precaution for securing quality - (건축공사 옥상 도막방수 공법의 LCC 분석 - 품질확보를 위한 사전대책을 중심으로 -)

  • Bae, Jae-Wook;Shin, Seung-Moon;Kim, Sang-Gap;Koo, Choong-Wan;Hong, Tae-Hoon;Koo, Kyo-Jin;Hyun, Chang-Taek
    • Korean Journal of Construction Engineering and Management
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    • v.9 no.4
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    • pp.57-65
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    • 2008
  • As the society is being developed, the desire about life quality is also growing. Even though the process of waterproof work has very close relation with these life quality, we always focus on management after problem than the precaution of problem. So this process has the highest rate of mengel. We develop LCC analysis model considering the precaution and try to show the necessity of the precaution by comparing and analyzing every alternative proposal during LCC. By studying of the previous work and the result of questionnaire, we deduce the problem of waterproof work in construction area. By discussion with an expert in this process and research, we make solutions about precaution and set the cost items in every alternative proposal about these solutions. We understand the effect of each elements through sensitive analysis of the cost items, and find the economically best suited solution.