난연 EPS 재활용을 위한 감용 ingot 공정 연구

김상채 ( Sang-chae Kim ),송주현 ( Ju Hyun Song ),김웅찬 ( Woong Chan Kim ),여종빈 ( Jong-bin Yeo ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.4

In this paper, we investigated the properties of volume reduction ingot for the recycling of flame-resistant expanded polystyrene (EPS) waste. The experimental method consisted of a composite process involving EPS reduction, grinding, crushing, and degreasing. Through our study we determined that the optimum process for achieving the desired results involved a combination of multi-grinding and degreasing methods. Furthermore, we identified the optimal heat condition for the degreasing process to maintain flame retardant properties as 600℃ for a duration of 2 h. In addition, we provide evidence to support the feasibility of using this process in EPS recycling for flame retardant materials.

廢 EPS를 利用한 再生骨材의 特性과 輕量 콘크리트벽돌의 斷熱性能에 관한 實驗的 硏究

오태운,안재철,이학기,강병희 대한건축학회지회연합회 2001 대한건축학회연합논문집 Vol.3 No.2

난연성 EPS 폐기물을 혼입한 경량기포 콘크리트의 물리적 특성

어석홍(Seok-Hong Eo),손지운(Ji-Woon Son) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.2

본 논문에서는 경량기포 콘크리트에 EPS 폐기물과 난연성 EPS 폐기물 보강재를 각각 혼입해 물성 특성을 연구하였다. 물시멘트비는 50% 고정시켰으며 단위시멘트량은 300, 400kgf/㎥으로 설정하였다. 독립기포용 기포제를 사용하였고, 희석농도는 10%로 설정하여 혼합하였다. 혼입률은 0, 10, 20, 30, 40%로 혼입하였으며, 선 기포 방식으로 제조하였다. 상기 배합조건 별로 제작된 경량기포 콘크리트 시험체의 겉보기 밀도, 휨강도, 열전도율을 측정하고 분석하였다. 실험결과, 겉보기 밀도는 단위시멘트량에 관계없이 2~3% 내외의 차이를 보였고 각각 KS F 4039 겉보기 밀도의 0.5품, 0.6품을 만족시켰다. 휨강도는 압축강도를 통해 치환하여 압축강도 기준 0.4품, 0.5품, 0.6품 만족 시켰으며, 열전도율은 난연성 EPS 폐기물 보다 EPS 폐기물이 보강재일 경우가 3~5% 정도 높게 나왔지만 두 보강재 모두 KS F 4039 0.4품 기준을 만족하였다. 흡수율 측면에서는 EPS 폐기물과 난연성 EPS 폐기물 보강재를 혼입한 경우 1~3%정도의 차이를 보였지만 모두 20%가 넘는 높은 수치를 보여 추가적인 보강재나 배합비가 필요할 것으로 판단된다. The physical properties of lightweight foamed concrete mixed with EPS waste and flame resistant EPS waste investigated. For this purpose, the main variables considered were a cement content of 300 and 400kgf/㎥ and an EPS replacement ratio of 0, 10, 20, 30, and 40% by the volume ratio of the foam. The water-cement ratio and the dilution concentration were fixed to 0.5 and 10% respectively. The test results showed that the apparent density meets degrees 0.5 and 0.6 of KS F4039, and they showed little difference between the two mixes of Type And Type B, regardless of the unit cement content. The bending strength obtained through the compressive strength also met the degree of KS F 4039. The thermal conductively was 1~3% higher for the mixes of EPS than the case of flame resistant EPS, but both mixes met the 0.4 degree of KS F4039. The absorption ratio showed the values above 20% with a 1~3% difference for the two mixes, which mean further studies will be needed to reduce the absorption ratio.

폐페인트 순환자원을 활용한 인조석 제조 프로세스의 설계

문종욱(Moon, Jong-Wook),김대영(Kim, Dae-Young) 대한건축학회 2022 대한건축학회논문집 Vol.38 No.2

The manufacturing process of artificial stone was analyzed through proper composition cost of complex substances such as waste paint and waste EPS generated by industries; measures were proposed to effectively increase the utilization and recycling rate of manufactured artificial stone. Experiments on compression strength, gravity, absorption, bending strength, and thermal conductivity of manufactured artificial stone demonstrated its availability in architecture and ultimately helped to increase the recycling rate of waste paint. Manufactured waste EPS proposed a manufacturing process that allows surface membranes to form, increase weight, and enhance hardness to increase binding power with other materials. Upon analysis of two purification resources involving the manufacturing process of waste paint and waste EPS, it was revealed that waste paint was produced with a certain specification of particle size, and waste EPS formed one complex. The manufacturing composition cost of artificial stone was proposed by adding cement, silicon, polyethylene, and waste paint aggregates into three categories; the composition cost was differently evaluated to resolve the combustibility issue of polyethylene. Manufactured artificial stone showed good results in compression strength, gravity, absorption rate, and bending strength evaluation, and in particular, flame retardability evaluation showed values above Class 1 and 2, demonstrating the potential to compensate for the shortcomings of existing artificial stone.

새활용 EPS(Expanded Polystyrene) 기술 개발 및 효용성 분석

김남균,오재성,김경문 한국폐기물자원순환학회 2020 한국폐기물자원순환학회지 Vol.37 No.1

없음 Since January 2018, China’s ban on imports of waste plastics has reduced the profitability of recycling styrofoamthrough recycling. Accordingly, the recycling industry is avoiding the collection and processing of waste styrofoam, andthe resulting waste problems are becoming a social problem. Therefore, this study aims to develop semi-incombustiblebuilding insulation through the upcycling of waste EPS, and perform the efficiency analysis through flame retardantperformance test and fire simulation (FDS). The results of cone calorimeter test and FDS analysis showed the improvedperformance in terms of fire safety by confirming the reduction of heat release rate and the decrease of temperature, COand CO2 generation, and the increase of visible distance and oxygen concentration. The upcycling technology developmentof waste EPS is expected to greatly contribute to the utilization of waste resources, reduction of building material cost,and improvement of profitability of recycling business.

Plastic recycling and material flow of packaging expanded polystyrene by EPR in South Korea

( Hakyun Song ),( Youngsun Kwon ),( Yong-chul Jang ),( Byeonghwan Kim ),( Dong Gyu Shin ),( Yongseon Lee ) 한국폐기물자원순환학회 2022 ISSE 초록집 Vol.2022 No.-

Expanded polystyrene (EPS) is one of the thermoplastic polymers that are widely used in many industrial applications such as insulation, packaging, aquaculture floats, and buoys. Since it has the property of easy material decomposition into small microplastics under natural environment, stringent management measures for such materials are urgently required. In this study, material flow analysis (MFA) was conducted to determine quantitative flows of the materials by life cycle (manufacturing, use, collection, recycling and disposal). Based on the results, the predicted EPS consumption by 2030 was estimated using several linear regression methods. In 2019, approximately 47,000 tons of packaging EPS out of total 337,000 ton EPS were consumed and distributed in Korea. About 53,000 tons of waste EPS forms were collected by recycling waste streams, out of which 41,900 tons were recycled as ingot (40,871 tons), fire-resistance coatings for steel frames (1,521 tons), and pellet (287 tons). By using the regression analysis, from 2003 to 2019, the amount of EPS consumption was steadily increased, and the cumulative amount of EPS recycling by the period was estimated to be about 412,000 tons by 2030. This study evaluated the potential benefits of resource savings and reduction of greenhouse gas emissions through EPS packaging recycling.

廢 EPS 再生骨材의 空隙構造와 輕量骨材콘크리트의 斷熱性能

안재철(Ahn Jae-Cheol) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.4

This study is to investigate the insulation performance of lightweight concrete using recycled lightweight aggregate, and to develop lightweight concrete products which have an excellence on the insulation performance satisfying with properties of building materials. As a result of this study, recycled EPS aggregate is considered to have an independent pores which is closed by dense partitions. So, it is showed that the insulation performance of lightweight concrete using recycled EPS aggregate is excellent. Especially, in the case of lightweight concrete under conditions of replacement ratio over 100%, it is considered that insulation performance is very excellent as thermal conductivity is showed about 0.2㎉/mh℃. Considering the relation between ultrasonic pulse velocity and unit weight & thermal conductivity through the graph, the result of relation between ultrasonic pulse velocity and unit weight & thermal conductivity on the graph expressed their high interaction shown as direct proportion on the graph. Therefore, it is possible to extract the insulation performance of lightweight concrete using recycled EPS aggregate by ultrasonic pulse velocity and unit weight.

벤젠系 溶媒를 利用한 廢 EPS 도막 防水材 開發에 관한 基礎的 硏究

김현수,안재철,강병희 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2

This study is to investigate whether the solution which EPS Waste is melted by Toluene and Xylene in has the feasibilities as the water proofing materials. The tests with the times of absorption, permeability, bond strength, tensile strength in accordance with times of application and the rate of solution were performed and analyzed. In conclusion, the suitable soluble rate of EPS Waste is 50% and the best times of application is 3 times when it was compared with the existing waterproofing materials. there were no differences in the quality, so it has potential feasibilities to be used as waterproofing materials in the field in the futures.

폐(廢) EPS 재생골재(再生骨材)의 공극구조(空隙構造)와 경량골재(輕量骨材)콘크리트의 단열성능(斷熱性能)에 관한 연구(硏究)

탁현철 ( Hyun Cheol Tak ),정민수 ( Min Soo Jung ),안재철 ( Jae Cheol Ahn ),강병희 ( Byeung Hee Kang ) 한국건축시공학회 2002 한국건축시공학회 학술발표대회 논문집 Vol.2 No.1

This study is to investigate the insulation performance of lightweight concrete using recycled lightweight aggregate, to develop lightweight concrete products which have an excellence on the insulation performance are satisfied with properties of building materials. As a result of this study, recycled EPS aggregate is considered to have an independent pores which is closed by dense partitions. So, it is showed that the insulation performance of lightweight concrete using recycled EPS aggregate are excellent. Especially, in the case of lightweight concrete under conditions of replacement ratio over 100%, it is considered that insulation performance is very excellent as thermal conductivity is showed about 0.2㎉/mh℃. According to considering the relation between ultrasonic pulse velocity, unit weight and thermal conductivity through the graph, the result of relation between ultrasonic pulse velocity, unit weight and thermal conductivity on the graph expressed their high interaction shown as direct proportion on the graph. So that it is possible to extract the insulation performance of lightweight concrete using recycled EPS aggregate by ultrasonic pulse velocity and unit weight.

廢 EPS 再生 잔骨材를 利用한 輕量콘크리트의 物性에 관한 實驗的 硏究

강병희,안재철 대한건축학회지회연합회 2000 대한건축학회연합논문집 Vol.2 No.2