• Title/Summary/Keyword: 하자원인

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화재원인조사실무 - 발화원의 감정(V)

  • Kim, Yun-Hoe
    • 방재와보험
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    • s.107
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    • pp.28-33
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    • 2005
  • 절연된 물질 상호간에 전기저항이 감소하여 많은 전류를 흐르게 하는 절연파괴는 화재발생의 원인중 하나이다. 절연파괴의 원인으로는 기계적 손상, 절연피복의 손상, 허용전류를 넘어선 열적손상 등이 있다. 이번 호에는 절연 내력이 점차 저하하여 마침내 절연파괴를 일으키는 배선에서의 전기력 발연원인에 대해 고찰해보기로 하자.

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Analyzing Defects Types and Causes of Activities in Information and Communication Works Based on Investigation (정보통신공사 하자관리 실태조사를 통한 세부 공종별 하자 유형 및 원인 분석)

  • Eom, Yong-Been;Sohn, Sung-Geun;Kang, Sang-Hun;Park, Hyun Jung
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.05a
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    • pp.269-270
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    • 2021
  • As the era of the Fourth Industrial Revolution arrives and the culture of contact-less was established due to the long-term COVID-19, the construction industry is striving to develop smart home services to expand the scope of information and communications technology (ICT) to provide convenience to residents. However, various defects are occurring in information and communications technology facilities in apartments, and related research is lacking. In this study, case studies and research methods of related prior studies are analyzed as a basis for identifying the types and causes of defects that occur in information and communications technology facilities. To analyze various studies, we divided them into studies on smart home Internet of Things (IoT), information and communications technology construction of apartments, and investigated their features and limitations. Plus, future research will be conducted on apartments within 10 years of completion among apartments completed by domestic construction companies to supplement the limitations of prior research. In addition, we will prepare basic data on defects of ICT construction by analyzing the major causes of defect types through the analysis of defect types and frequency by detailed work type of information and communications technology construction.

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한의학에서 알아본 강박증 - 마음속 깊은 응어리를 풀자

  • 조홍건
    • 가정의 벗
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    • v.37 no.5 s.429
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    • pp.12-13
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    • 2004
  • 억제하면 억제할수록 불안해지는 생각을 더 많이 하게 된다는 강박증, 그 원인이 단순하지 않고 한가지 요인이 아닌 체질과 환경의 다양한 영향으로 생기게 되는 병이라 한다. 한의학을 통해 강박증의 원인과 치료에 대해서 알아보도록 하자.

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Effect of Water-Containing Conditions on Concrete Substrates on Defects of Polyurethane-based Waterproofing Materials (콘크리트 바탕면의 함수조건이 폴리 우레탄계 방수재 하자에 미치는 영향)

  • Lee, Gun-Cheol;Kim, Jae-Yeob;Kim, Young-Min;Hong, Sung-Rok;Kim, Young-Sam;Shin, Hong-Chol
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.1
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    • pp.1-9
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    • 2023
  • This study is to analyze the cause of the defects in polyurethane waterproofing, a material commonly used on the roof of buildings, and to determine if it has a relation with the curing conditions of humidity and temperature and the moisture content of the base structure. As a result, it was confirmed that the waterproofing coating did not adhere when the moisture content of the base plate was 10% or more. When the temperature and humidity conditions were 20℃ and 80%RH, none of the properties deteriorate but when the temperature was 40℃, 60%RH, air bubbles were formed on the surface, and at 40℃ and 80%RH, the basic properties of the dry coating film were less than the KS F 3211 performance standard.

A Case Study on the Debonding Defect of Wood Floor Board in Apartment House (공동주택 바닥 목재 마루판 들뜸 하자 사례조사 연구)

  • Choi, Sung-Yong;Han, Min-Cheol;Han, Cheon-Gco
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2008.11a
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    • pp.914-917
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    • 2008
  • This paper was to discuss the case and cause of debonding defect of wood floor board in apartment house by investigating actual survey. Most frequent defect in wood floor board was debonding of floor board. Scratch, gap and crack of floor board were also found in floor board installment work. Causes of debonding of floor board is shrinkage of cement mortar beneath floor board and expansion of floor board. Haste in floor board work did not provide enough time to dry cement mortar fully, which led to continue to dry after the installment of floor board. It caused moisture movement toward wood floor board. Accordingly, Before floor board work, careful consideration on moisture condition of cement mortar and enough curing time to eliminate the effect of moisture are taken into.

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