• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.99-105
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• 2008

For large-scale projects, supply chain management of construction materials is a key to a successful construction project. Inefficient management would cause significant loss in project cost, quality problems (and possible re-work), delayed delivery, claims, etc. On the other hand, efficient supply chain management system can reduce risks even the given project suffers from tricky details and frequent changes thanks to reduced material loss, shortened delivery time, and the quality outcome; this is a win-win situation for both clients and contractors. This paper presents a next-generation intelligent supply chain management system, which is intended to support large-scale construction projects such as urban high-rise buildings, as a strategic vision of the future construction logistics.

• Journal of the Korea Institute of Building Construction
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• v.21 no.2
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• pp.113-119
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• 2021

Polymers are widely applied to construction materials due to their lightweight and excellent mechanical properties. However, owing to the combustible properties, polymers are one of the biggest reason of spreading large fires in fire accidents that occur frequently in the construction industry. Therefore, as a solution to this problem, many research has been conducted to impart flame retardancy by incorporating flame retardants to polymer matrix. Among these flame retardants, organic phosphorus-containing flame retardants have been attracting much attention because they have excellent compatibility with polymer matrix and low toxicity compared with halogen or inorganic-containing flame retardants. Accordingly, this study aims to design and synthesize an alkoxyamine-based organic phosphorus flame retardant to improve flame retardancy of polylactide which is an eco-friendly polymer used for construction materials.

• Journal of Korean Tunnelling and Underground Space Association
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• v.13 no.2
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• pp.133-148
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• 2011

Construction sites are becoming larger and complex with the growth of national economy. Accordingly, it is important to identify real-time information about materials, equipments, and manpower during construction at sites. Even though research utilizing position tracking sensors has been conducted in architectural engineering fields, this area of research is almost nil in civil engineering fields. Therefore, a feasibility study to find a way to apply position tracking sensors to an in-situ tunnel construction site adopting conventional tunnelling method is performed in this study. A methodology is proposed that the progress management of the tunnelling work can be monitored by checking construction materials needed at job site and the safety management system can be assessed by checking distance between in-situ workers and construction equipments. The most representative materials were identified so that IT technology can be applied by attaching and monitoring sensors to the selected materials. Also, time of arrival (TOA) for a position determination technology along with a wireless network technology was chosen and build wireless network system. The adopted methodology was applied to an in-situ tunnelling site, and verified the usefulness of the proposed system.

• Journal of the Korea Institute of Building Construction
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• v.11 no.3
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• pp.247-255
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• 2011

Currently, there is database for per unit requirements of major construction materials in terms of energy consumption and $CO_2$ emission based on the input-output table published by the Bank of Korea in 2000, but no database for per unit requirements based on input-output tables was published in 2005 and 2007. The purpose of this study was to calculate the unit requirement values of major construction materials in terms of energy consumption and $CO_2$ emission generated by using the input-output tables published in 2005 and 2007. To estimate the unit requirement values, a database building method with the input-output tables was adopted by selecting 16 types of construction materials in wide use on construction sites. When the study results were compared with existing unit requirement values based on the input-output table of 2000, there were small discrepancies, from which it can be interpreted that the method used in the study is reasonable. Unit requirement values estimated based on input-output tables of 2005 and 2007 tended to decrease, and the highest value of energy consumption and $CO_2$ emission were found in the materials using cement and rebar.

• Journal of the Korea Institute of Building Construction
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• v.9 no.6
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• pp.183-188
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• 2009

HwaSeong (Suwon Fortress) was built during the reign of King Jeong-jo in the Choseon Dynasty. Detailed information on the construction of HwaSeong can be found in Hwaseong Seongyeok Euigui. In this sense, it is necessary to perform a comparative analysis on the Hwaseong Seongyeok Euigui based on construction management factors. This paper aims to analyze the HwaSeong construction project from a modern construction perspective by comparing and reviewing information related to the procurement of construction materials of the time. For this, wooden and steel materials and tiles were analyzed by supply area, supply channel, type and price. From the results of the analysis, it is found that the government used both private and official channels to supply materials. In particular, except for wooden materials that could be supplied from Bongsan, the supply of materials showed a high dependency on private channels. In terms of steel, it was almost 30 percent cheaper through private channels than when purchased through the official channel. Finally, materials vulnerable to damage like tiles were manufactured from the areas near the construction site. From this fact it can be interpreted that the government had a flexible procurement system, including manufacturing on the spot and external suppliers,depending on the property of the material. It is expected these analytical results will serve as key data to understand the management factors in constructing HwaSeong.

• 월간 기계설비
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• s.290
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• pp.48-52
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• 2014

설비건설업계에서 인터넷 상거래 개념조차 생소했던 지난 2001년 '이마켓 플레이스'라는 사이버 장터를 개설하여 설비재재 유통의 신기원을 연 (주)원캔네트웍스(대표 홍평우)가 지난 8월 B2C 소핑몰(www.sulbimall.com)을 오픈하고 사업 다각화에 나섰다. 대한민국 설비자재 유통업체 1위, 600여 설비자재 공급사와 긴밀한 네트워크 형성, 대한설비건설협회 5천여 회원사와 협력 제휴, 국내 최고 우량 설비사들로 구성된 주주(우진INS, 세일ENS, 세보MEC, 우양기건, 동산테크) 등 우수한 경영진과 탄탄한 배경을 가진 원캔네트웍스가 새로운 변신을 시도한 것이다. '설비넷'에서 2007년 원캔네트웍스로 상호를 변경하며 설비건설업계에 신선한 바람을 일으켜 온 원캔은 소량의 자재를 현금이나 카드로 쉽게 거래할 수 있으면 좋겠다는 고객들의 요청에 부응하여 일반 고객들과 중소 규모의 위생설비 시공자, 딜러들을 겨냥한 새 전자상거래 장터 설비몰을 오픈함으로써 B2B에 이어 B2C거래에서도 고객들의 전폭적인 사랑과 인기를 이어갈 것으로 기대된다. 원캔의 경영을 총괄하고 있는 김현회 총괄본 부장을 만났다.

• 월간 기계설비
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• s.9
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• pp.95-101
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• 1991

정부의 주택 2백만호 건설이 본격 추진되면서 건설인력난, 자재난 등이 심화되고 있어 설비공사업계가 이의 대책 마련의 일환으로 건식공법 개발에 부심한 노력을 기울이고 있다. 건식 공법은 자재의 대량생산으로 현장에서 조립만 하면 되기 때문에 시공이 간편할 뿐만 아니라 비숙련공도 거뜬히 시공할 수 있어 인건비 및 자재난 등을 해결할 수 있다. 게다가 건설공사에 있어서 가장 중요한 공사비 절감, 공기 단축, 품질의 표준화 등의 효과를 누릴 수 있기 때문에 설비공사업계에선 이의 적극적인 도입이 더욱 필요한 때이다.

• 월간 기계설비
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• no.9 s.218
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• pp.51-55
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• 2008

제출된 입찰서는 대부분 공개적으로 개봉하며, 입찰자의 명칭과 입찰금액이 함께 공표된다. 감리자는 입찰서가 산술적으로 정확한지, 요구된 자재 및 입찰문서의 조건에 부합하는지를 검토하고, 입찰자와 면담 등을 통해 입찰서의 평가를 완료한 후 발주자에게 낙찰(계약)수여에 관해 추천을 한다. 발주자는 낙찰된 입찰자에게 낙찰통지서(Letter of Award) 또는 낙찰(계약)의향서(Letter of Intent)를 발급해 시공자가 작업준비를 할 수 있게 한다. 낙찰통지서를 받은 시공자는 공사이행보증서(Performance Bond) 및 선수금 보증서(Advance Payment Bond)를 제출하고, 입찰보증서(Tender Bond)를 반환 받으며, 계약체결을 완료한다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.11a
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• pp.221-222
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• 2023

In this study, the performance evaluation of waterproof sealant materials applied to the outer wall of PC apartment houses was conducted. The sealant for PC members must have resistance to movement, and since it is exposed to outside air, weather resistance and water resistance are required.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.656-661
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• 2009

상수도시설은 준공후 관련지자체에 이관 관리하는 시설로서 사용관종이 현재 다양하게 생산 보급되고 있어 관종 선정시 다각적인 측면에서 검토하여 채택하여야 한다. 최근 한국토지공사에서 사용하고 있는 상수도 관종은 대부분 택지개발계획 등 인허가 당시부터 관리주체인 지방자치단체 등과의 협의과정을 거쳐 선정되는 경우가 많아 자재선택에 한계성이 있다. 이를 극복하기 위해서는 자재 성능에 대한 공사내 명확한 기준이 제시되어야 한다. 상수관종을 선정하기 위한 가장 중요한 요소는 경제성으로 판단되는데, 관종의 경제성은 시공비와 자재비를 포함한 단순 공사비에만 국한되는 것이 아니라 유지관리비용을 포함한 생애주기비용(LCC: Life Cycle Cost)을 평가하여야 한다. 따라서 본 연구에서는 한국토지공사에서 택지지구 조성을 위해 사용한 배수관.급수관용 상수관종에 대한 경제성 평가기준을 제시하였고, 평가기준에 따라 각각의 택지지구 조성사례별로 종합적인 경제성 평가를 수행하였다. 보다 풍부한 자료를 바탕으로 객관적인 경제성평가 기준을 수립하기 위한 전(前)과정으로 이해되길 바라며, 설계시부터 객관적인 평가기준을 통해 합리적인 상수관을 선정하여 지금까지의 상수관종 자재선택의 한계를 최소한으로 축소하고자 하는데 가장 큰 목표를 가지고 있다.