• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.2D
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• pp.143-151
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• 2010

Currently, one of the most interested things at home and abroad country will be an eco-friendly construction. Among these, one of the most important elements will be the recycle and reuse of construction and demolition waste. Because construction waste is generated the most at the demolition phase, it is important to minimize the quantity of the demolition waste at the phase. And it is also important to develop a system to manage rightly the generated demolition waste. But in the domestic country, a research for this has hardly been carried out. In recent, the government has realized its importance and is making a research to improve demolition technique and is preparing a research to make a raw for deconstruction. Therefore, this study examined its application situation and importance by analyzing the trend of demolition technique used in the domestic industry. Also this study carried out a survey for situation analysis of the demolition industry. This study suggested items needed for the development of demolition technique, demolition design and reduction of C&D waste through a survey results and a situation analysis.

• Korean Journal of Construction Engineering and Management
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• v.9 no.4
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• pp.131-139
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• 2008

Now, one of the greatest concerns at home and abroad is eco-friendly construction. Above all, the reduce and recycle of the construction waste may be one of the most important things. The construction waste has been produced most at demolition phase, but the research into that area has not being to make nearly within the country. Recently, as the government have realized the importance of that area, they are making research to improve traditional demolition methods. Also, they are preparing to make a raw to enforce deconstruction during demolition phase. This research has analyzed the problems and waste types which produced during the demolition works by surveying in site. Until now, in the interior, the right quantity basis has not been suggested, because of the absence of any methods to estimate it accurately. Therefore, this study has compared and analyzed owner's ordering quantity, drawing analysis quantity with measuring the waste to produced at site during demolition works, this research results are expected to be the important materials for future research into the construction waste area.

• Korean Journal of Construction Engineering and Management
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• v.12 no.1
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• pp.133-140
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• 2011

Recently, the demolition industry is becoming more important than ever for formulating reuse and recycling of a construction waste with the current trend in pursuing a sustainable development. As considering the situation of a domestic housing construction and an existing house, a scale of a demolition market is expected to increase continually. Therefore, for a sustainable development, it is needed to forecast and manage rightly the demolition waste producted in a demolition phase. But, because most of a demolition company is very small and the investment in a technology development is not enough, the effort to develope a system and to make a standard for managing righly a demolition waste is also not sufficient. Therefore, this study develops a system to automatize quantifying a demolition waste. This system makes it possible to manage the planning of demolition works and the quantifying, disposal, reusing and recycling of a demolition waste in one system by integrating all the activities related with demolition works. 3D drawings of each element for demolition works will manage by being linked to its schedule for visualizing 3D object. Also, this study presents methods for quantifying easily a demolition waste by using 3D object.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.824-827
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• 2008

Currently, major interested thing at home and abroad is to pursuit a sustaining development of an environmental construction industry through low discharge of carbon dioxide and reuse of construction waste and so on. In order to achieve those goals, we must develop the design technique which can reduce a generated amount of C&D waste from a design phase and technique which can reduce and recycle C&D waste generated at a demolition phase. But a domestic policy for the development and the support of a demolition industry is analyzed to be more insufficient than other advanced country. Therefore, this study analyzed a demolition market trend of foreign country and assessed properties of a domestic demolition industry. Also this study forecasted a scale of a demolition market and analyzed its trend based on total number of housing construction per year. Consequently, this study suggested the development direction of a demolition industry through those analyzed results, expecting the research results to be a fundamental data for the development of demolition industry and the policy of construction waste.

• Resources Recycling
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• v.25 no.2
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• pp.42-48
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• 2016

Although the generation of waste flat panel displays in Korea is expected to exceed one million sets in 2016, a comprehensive recycling technology has not yet been developed for effective recovery of valuable materials from the wastes, rendering to outshine the national prestige as a global leader in display industries. The overall aim of this study was to analyze the statistical data of various valuable materials and their ratio after dismantling 40-inch and 42-inch sized waste LCDs. The analysis results showed that plastic portion of the wastes was about 22% and the portion of PCB (Print Circuit Board) part was about 9% by weight whereas panel part was about 34% and leftovers including metals totalled about 35% by weight. Based on the analytical results, a higher value recycling process could be proposed with advanced material separation techniques.

• Korean Journal of Construction Engineering and Management
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• v.11 no.3
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• pp.64-71
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• 2010

Since 2010, it is estimated that the old building to be dismantled potentially will be about 8.9 million house in domestic country. Consequently, now domestic demolition market size of about 1.5 trillion won is forecasted to be grow rapidly into the size of 5.8 trillion won. But in the domestic country, preparation of the raw and regulation for the demolition industry is very insufficient compared with advanced country, and the related research is also very insufficient. Therefore, in this study, it is performed to analyse and predict a trend of domestic demolition market after analysing a current trend in overseas demolition industry. A demolition industry is a related industry fallen behind over 25 years compared with a construction industry. The exact analysis of those trends will make it possible to set the standard for demolition waste management. Also this study suggests methods be able to develop the demolition industry into main area of construction industry through those analysis.

• Journal of the Korean Recycled Construction Resources Institute
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• v.4 no.4
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• pp.371-378
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• 2016

In this study, a small portable sorting pilot for separation that can be used in dismantling construction site, which is the stage of construction waste generation, was developed, and its separation efficiency was evaluated to increase the actual recycling rate of the construction waste. The pilot was developed as portable sorting pilot for separation of 6 ton capacity that can handle one arm roll box within a $15m^2$ area in consideration of narrow places in the downtown area where a number of dismantling sites are located and various processes performed in the dismantling sites. In order to evaluate the efficiency performance of the developed device, the separation and sorting were carried out ten times with respect to trommel rotational speed RPM 2-3, 4-6 and 7-8. According to the results, the highest efficiency of about 90% was shown at RPM 6-7.

• Journal of Adhesion and Interface
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• v.11 no.1
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• pp.26-34
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• 2010

We synthesized polyurethane adhesive having thermal characteristic could be debonded by heat treatment and made a dismantlable polyurethane adhesive including thermally expansive bead. We used dynamic mechanical thermal analyzer (DMA) to confirm thermal characteristic and investigated bond strength, dismantlement property of dismantlable polyurethane adhesive by content of thermally expansive bead, heating trigger and treatment conditions. The dismantlable polyurethane adhesive could be expanded by hot-air or microwave treatment and the dismantlement of the specimens became easier as the weight fraction of the thermally expansive bead increased. At the dismantlable polyurethane adhesive, the content of thermally expansive bead 40% was suitable for both bond strength and dismantlement, in case of using hot-air treatment as trigger for dismantlement, bonded joints were separated easily at $160^{\circ}C$ for 30 min and in case of using microwave as trigger, bonded joints were separated easily by irradiating microwave for 4 min.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2016.10a
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• pp.147-148
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• 2016

ACPF 핫셀에 기 설치된 일체형 원격조종기의 해체 작업은 모두 완료 되었으며, 셀 내 부압 유지를 위해 월튜브 전면부는 기밀되었다. 금년 말까지 핫셀 원격조종기를 모두 분리형으로 대체하여 전해환 공정 실험의 원격작업에 활용할 계획이다.

• Journal of the Korean Recycled Construction Resources Institute
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• v.11 no.3
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• pp.251-259
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• 2023

In this study, as a foundational research aimed at promoting the efficient recycling and environmentally friendly disposal of construction waste through the activation of a selective dismantling system, our primary objective was to analyze the economic feasibility of implementing selective dismantling. To achieve this, we conducted an assessment on a 5-story residential building with a construction area of 2,400 m² as a case study. When considering the additional cost of dismantling construction ① the reduction in waste disposal costs due to decreased mixed waste, ② and the potential revenue from recycling through the separation and sorting of waste materials, and ③ we were able to comprehensively confirm that there is an expected cost-saving effect totaling 34,727,000 KRW when compared to conventional demolition methods.