• Title/Summary/Keyword: 건축물의 재활용

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Recycle Possibility of the Stone-Dust in Quarry as Subbase Layer Materials of the Road (도로 보조기층재로서 채석장 석분토의 재활용가능성 분석)

  • Kim, Kyeong-Su;Song, Young-Suk
    • The Journal of Engineering Geology
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    • v.17 no.2 s.52
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    • pp.279-287
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    • 2007
  • An ore of stone obtained from quarry lose its about 60% such as the muck and the stone-dust during the process of making the architectural block, the crushed aggregate and so on. A part of the muck is only reutilized for the crushed aggregate as road pavement materials, while the most of the muck in the shape of powder is mixed with water and then it is deposited in a sludge tank. The muck in the shape of powder is called the stone-dust. If the stone-dust is discharged and sprayed, an ecosystem will have terrible damage because the seepage of surface water, the flow of ground water and the movement of air are not occurred smoothly by packing the void of soils. As the Waste Management Law (2003) in Korea, the stone-dust is sorted out the industrial waste and the most of that is dumped in ground. Therefore, the establishments of an efficient recycling plan are necessary through the improvement of engineering properties of the stone-dust. To investigate the possibility of recycle and improvement for the stone-dust, the stone-dust and natural soils are sampled from six quarries in Korea. The various soil tests are performed by use of the mixed soils with the stone-dust content ratio. As the result of various soil tests, the recycle possibility of the stone-dust is analyzed as subbase layer materials of the roads.

A Study on the Establishment of Design and Construction Process Standardization through Building BIM Application Case (건축물 BIM 적용사례를 통한 설계 및 시공프로세스 표준화 수립에 대한 연구)

  • Jeong, Hee-woong
    • Journal of the Korea Institute of Building Construction
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    • v.22 no.4
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    • pp.347-358
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    • 2022
  • In order to satisfy the extraction and use of information such as estimates and processes required in the design and construction stages of BIM, which is an expectation of overall construction operation for the design and construction stage of domestic buildings, it is insufficient to supply and apply mobile technologies or terminals. In this paper, standardization of BIM-based processes from the design stage to the construction stage is proposed as an efficient construction system method through mobile-based simulation and test-bed case analysis review. The current status and potential of BIM application were identified through theoretical review of BIM and case studies at home and abroad. In addition, the overall flow of the project and the direction of effective process construction were investigated through each process by 3D, 4D, and 5D execution stage and the role of each collaborator. 4D building process BIM simulation system using mobile was implemented by applying a visualization engine that simulates process information, object information connection module, and related object information. Therefore, it was possible to minimize the possibility of re-construction of the BIM design and construction process model through the visualization of 2D drawings based on the 3D model of the building and the review of errors and interferences in the drawings. In addition, in the implementation of simulation for each process of the construction process through mobile devices, it was possible to support construction progress and process management according to the optimal option selected by the user.

An Experimental Study on Rapid Repairing Mortar for Road with Steel Slag (철강 슬래그를 사용한 도로용 긴급보수 모르타르에 관한 실험적 연구)

  • Jung, Ui-In;Kim, Bong-Joo;im, Jin-Man;Kwak, Eun-Gu
    • Journal of the Korea Institute of Building Construction
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    • v.18 no.5
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    • pp.419-427
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    • 2018
  • The purpose of this study is to recycle steel slag generated from the iron producing process and to use steel slag as a construction material which is currently landfilled Steel slag is subjected to aging treatment due to the problem of expansion and collapse when it reacts with water. The Slag Atomizing Technology (SAT) method developed to solve these problems of expanding collapse of steel slag. In this study, experimental study on the emergency repair mortar using the reducing slag, electric arc furnace slag and silicon manganese slag manufactured by the SAT method is Reduced slag was shown an accelerated hydration when it was replaced with rapidly-setting cement, and the rate of substitution was equivalent to 15%. It is shown that the electric furnace oxide slag is equivalent to 100% of the natural aggregate, and it can be replaced by 15-30% when the silicon manganic slag is substituted for the electric furnace oxide slag. With the above formulation, it was possible to design the rapidly repair mortar for road use. These recycling slags can contribute on achieving sustainability of construction industry by reducing the use of cement and natural aggregates and by reducing the generation of carbon dioxide and recycling waste slag.

Evaluation of Shape Deviation in Phase Change Material Molds Subjected to Hydration Heat During Ultra-High Performance Concrete Free-form Panel Fabrication (UHPC 비정형 패널 제작 시 수화열에 의한 PCM 거푸집의 형상오차 분석)

  • Kim, Hong-Yeon;Cha, Jae-Hyeok;Youn, Jong-Young;Kim, Sung-Jin;Lee, Donghoon
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.3
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    • pp.251-260
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    • 2023
  • The construction of free-form structures with intricate curved exteriors necessitates the use of bespoke molds. To fulfill this requirement, a blend of Phase Change Material(PCM) and Ultra-High Performance Concrete(UHPC) is utilized. PCM endows the solution with recyclability, while UHPC facilitates the effortless execution of curvature in the mold fabrication process. However, it's worth mentioning that the melting point of PCM hovers around 58-64℃, and the heat emanating from UHPC's hydration process can potentially jeopardize the integrity of the PCM mold. Hence, experimental validation of the mold shape is a prerequisite. In the conducted experiment, UHPC was poured into two distinct mold types: one that incorporated a 3mm silicone sheet mounted on the fabricated PCM mold(Panel A), and the other devoid of the silicone sheet(Panel B). The experimental outcomes revealed that Panel A possessed a thickness of 3.793mm, while Panel B exhibited a thickness of 5.72mm. This suggests that the mold lacking the silicone sheet(Panel B) was more susceptible to the thermal effects of hydration. These investigations furnish invaluable fundamental data for the manufacturing of ultra-high strength irregular panels and PCM molds. They contribute substantially to the enrichment of comprehension and application of these materials within the realm of construction.

Convergent Studies of Utilization Plan and Brand Suggestion for Abandoned Passenger Ferry Terminal in Jangseungpo to Improve Local Community Value (지역 가치 증진을 위한 장승포 폐 여객선 터미널의 활용 방안 및 브랜드 제안에 관한 융합 연구)

  • Lee, Ha Na;Oh, Kwang Myung;Paik, Jin Kyung
    • Korea Science and Art Forum
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    • v.37 no.2
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    • pp.239-250
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    • 2019
  • Along with changes in the industrial structure, revitalizing decrepit or abandoned industrial-age infrastructures are actively under way on a global scale. This study was motivated by an interest in investigating currently idle industrial infrastructures and revitalizing the abandoned passenger ferry terminal in Geoje's Jangseungpo and surrounding areas. The main aims of this study were to examine regional features for the purpose of establishing urban renewal plans and field opinions of the local residents on how to proceed with the restoration of the passenger ferry terminal. To this end, this paper looked into previous case studies of converting decrepit industrial infrastructures into new cultural venues, depending on each region's special circumstances. This paper's findings are as follows: First, as a result of this investigation, the author found that in all cases in Korea and elsewhere revitalization focused on creating modern cultural spaces appropriate for the region while retaining its traditional value. At the same time, they sought sustainable cultural and economic revival. Second, as a result of the investigation on Geoje City's local characteristics, the author found that the surrounding areas' commercial districts were depressed after the terminal's closure. At the time of the investigation, the city government was trying to reopen the terminal as a major port offering multiple international ferry destinations while attracting tourists. Third, as a result of the surveys on the local residents, it was found that more than half of the residents were in agreement with the city government's plan to reopen the terminal and expressed their wishes that they want the terminal to have other uses such as cultural venues. Based on these research results, the author makes proposals, including expanding the passenger ferry terminal and offering cultural spaces within and near the terminal, based on the local residents' opinions and in reflection of local circumstances. As part of this effort, the author also recommends a new brand name and design plan for the new passenger ferry terminal so that Geoje City can improve its local community value.

Mechanical Properties of Non-cement Matrix Utilizing the Circulating Fluidized Bed Combustion Boiler Fly Ash and Dyeing Sludge Carbide (염색슬러지 탄화물과 순환 유동층 연소 보일러 플라이애시를 활용한 무시멘트 경화체의 역학적 특성)

  • Kim, Tae-Hyun;Lee, Seung-Ho;Lee, Yong;Shin, Jin-Hyun;Lee, Sang-Soo
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.4 no.4
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    • pp.425-430
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    • 2016
  • Both rapid industrial development and society has achieved more comfortable life. But, behind this facts of this industrial development have current pictures that occur global warming and much more by-products by environmental pollution. Therefore, this study used BFS and CFA as by-products to reduce cement usage emitted at a high rate of $CO_2$ gas, to examine sludge recycling strategy more than 200,000ton emitted at local dyeing complex, we suggest basic data research about non-cement matrix properties of utilizing dyeing sludge carbide. As a result, the more dyeing sludge carbide replacement ratio gets higher, the more air content and flow rise. Also, as the dyeing sludge carbide replacement ratio increase more, flexural strength and compressive strength go down.

A Study on Fire Prevention Capability Performance Evaluation of the Phosphate Flame Retardant Honeycomb Core (인계 난연 허니컴 코아의 방화성능평가에 관한 연구)

  • Moon, Sung-Woong;Lim, Kyung-Bum;Rie, Dong-Ho
    • Fire Science and Engineering
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    • v.24 no.3
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    • pp.72-77
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    • 2010
  • Honeycomb core structure with its excellent stiffness and strength is being utilized in many fields such as interior building material. Because it is inexpensive and renewable, honeycomb paper production is economically and environmentally helpful. However, the paper needs to be fireproofed because it is vulnerable to fire. In this study, we have undergone the performance evaluation process of the honeycomb paper which is widely used as interior material of a fire door and packing material. Four kinds of honeycomb (a honeycomb made of flame-resistant paper; a honeycomb attached with conventional flame-resistant film made in the laboratory; honeycomb impregnated with flame retardant; a honeycomb attached with flame-resistant film after impregnating fire retardant) were used in the study to compare the fire retardant performance. As a result, the honeycomb with impregnated flame retardant showed the highest performance. The flame-resistant film was effective in delaying the igniting time but had a negative effect on the rate of heat and smoke production.

A Study on Organic-Inorganic Hybrid Sound Absorbing Materials Using by Recycling Gypsum (재활용 석고 부산물을 이용한 유무기 하이브리드 흡음재 개발 연구)

  • Shin, Hyun-Gyoo;Jeon, Bo-Ram;Ha, Joo-Yeon;Jeon, Chan-Soo
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.5 no.4
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    • pp.481-487
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    • 2017
  • The purpose of this study is to develop the hybrid sound-absorbing materials that is made from organic polyurethane sponge impregnated with inorganic binder solutions. The inorganic slurry which is made from ${\alpha}$-hemihydrate gypsum mixed with 60% water, and various additives including plasticizer are used as binder. The test specimens are prepared and tested for sound absorption performance by the impedance tube methods. From the test results, noise reduction coefficient(NRC) of development materials specimen bound by the inorganic binder slurry is 0.41. They are 2 times or more higher than commercial products specimens bound by organic materials only which have NRC values in the range of 0.14 to 0.28. The polyurethane sponge specimens impregnated with inorganic gypsum slurry binder have a good balance between performance and cost, and have proper properties in density, thermal conductivity, non-combustible, and absence of harmful substances as sound-absorbing internal boards for noise barrier wall. It is apparent that the good sound absorption materials can be produced according to the optimum mix design that is recommended from this study.

The Solidification Characteristics of Recycled Aggregate Mixed with Incineration Ash and Waste Concrete (소각재와 폐콘크리트를 이용한 재생골재의 고형화 특성)

  • Yeon, Ikjun;Ju, Soyoung;Lee, Sangwoo;Shin, Taeksoo;Kim, Kwangyul
    • Journal of the Korean GEO-environmental Society
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    • v.9 no.5
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    • pp.5-13
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    • 2008
  • In this study, It was carried out to evaluate the feasibility of recycled crushed concrete as aggregate used cement mortar replace sand and to investigate engineering properties of recycled aggregate for hazardous waste solidification. The compressive strength of cement mortar replaced 5-15% (wt.) recycled aggregate was over $163kgf/cm^2$ which is the standard of first grade concrete block class C. And cement mortar was examined to evaluate the stability by leaching test. Cu, Cd, Pb, Cr, and As as the heavy metals were proved very stable but mercury (Hg) was leached high concentration because it was simply tied to the cement surface. We investigated the crystal structures of cement mortar and they had shown the peaks of $Ca(OH)_2$, ettringite, and CSH (calcium silicate hydrate). As the result, the longer curing time, the higher CSH peak that means to increase compressive strength and the cement mortar was more stable. Therefore it was shown that it may be possible to apply hazardous waste solidification using recycled aggregate, fly ash and sewage sludge ash.

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Development of Parametric BIM Libraries for Civil Structures using National 2D Standard Drawings (국가 표준도를 이용한 토목 구조물 BIM 파라메트릭 라이브러리 구축에 관한 연구)

  • Kim, Cheong-Woon;Koo, Bonsang
    • Korean Journal of Construction Engineering and Management
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    • v.15 no.4
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    • pp.128-138
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    • 2014
  • Development of infrastructure component libraries is a critical requirement for the accelerated adoption of BIM in the civil engineering sector. Libraries reduce the time for BIM model creation, allows accurate quantity take offs, and shared use of standard models in a project. However, such libraries are currently in very short supply in the domestic infrastructure domain. This research introduces library components for retaining walls and box culverts generated from 2D standard drawings made publicly available by MOLIT. Commercial BIM software was used to create the concrete geometry and rebar, and dimensional/volumetric parameters were defined to maximize the reuse and generality of the libraries. Use of the these libraries in a project context demonstrates that they allow accurate and quick quantity take offs, and easier management of geometric information through the use of a single library as to numerous 2D drawings. It also demonstrates the easy modification of the geometries of the components if and when they need to changed. However, the application also showed that some of the rebar components (stirrups and length wise rebars) do not get properly updated when concrete geometries are changed, demonstrating the limits of current software applications. The research provides evidence of the many advantages of using BIM libraries in the civil engineering, thus providing the incentive for further development of standard libraries and promoting the use of BIM in infrastructure projects.