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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 東亞大學校 建設技術硏究所 1999 硏究論文集 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 of SEM, coater absorption, permeability, bond strength, tensile strength in accordance with the 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. 최근 구조물의 안전성에 대한 관심이 사회적으로 부각되면서 콘크리트 구조물에 대한 내구성 문제가 중요시되고 있다. 특히 구조물 에서의 누수가 콘크리트의 성능저하 및 수명단축의 중요 요인으로 작용함에 따라 이를 방지하기 위한 연구의 필요성이 강조되고 있다. 그리고, Poly-Styrene 수지를 발포하여 제작된 EPS(Expanded Poly-Styrene)는 열과 냉기의 침입에 대한 차단효과가 높고 성형성 이 우수하여 각종 제품의 제조에 널리 사용되고 있다. 산업의 발달과 더불어 EPS의 수요가 계속해서 증가함에 따라 폐 EPS의 발생량도 점차 증가하는 추세에 있다. 그러나, 폐EPS는 부피가 크고 난분해성 복합재료로서 매립이 곤란하고 소각 시 유독가스가 발생하므로 환경보호와 에너지 절약 면에서 다양한 재활용 기술 개발이 요구된다. 따라서, 본 연구는 벤젠계 용매인 Toluene과 Xylene에 폐 EPS 수지를 용해시켜 그 용해물의 방수실험을 통해 방수성능을 평가하였다. 그 결과를 토대로 폐 EPS 수지를 재활용 하는 방안으로 방수재 개발에 관한 기초적 자료를 제공하는 것을 본 연구의 목적으로 하였다.
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.
심실 중격 결손과 동맥관 개존증을 동반한 아이젠멩거 증후군 환자에서의 심장-폐이식 수술 1예 보고
백효채,홍유선,김도형,함석진,이교준,이두연,권혁문,김형중,조상호 대한흉부외과학회 2003 Journal of Chest Surgery (J Chest Surg) Vol.36 No.6
Heart-lung transplantation is a widely accepted treatment for Eisenmenger's syndrome. The patient is a 41-years-oldmale diagnosed with Eisenmenger's syndrome due to patent ductus arteriosus. The pressures were checked asfollows: aorta 130/80 mean 100 mmHg, pulmonary artery 130/80 mean 109 mmHg, and right ventricle 130/20 mmHg,right atrium mean 20 mmHg. The patient needed heart-lung transplantation due to enlarged right pulmonary artery(diameter 7.5 cm). The donor was a 24 years-old male diagnosed as brain death due to subdural hematoma. Ligationof patent ductus arteriosus was performed under the cardiopulmonary bypass followed by heart-lung transplantation. Patient was extubated on postoperative day one, transferred to the general ward on day 3, and wasdischarged on postoperative day 33. Cardiac and lung biopsy was performed on postoperative day 41 with nosigns of rejection. 심장-폐이식은 현재 선천성 심장 질환에 의한 이차성 폐동맥 고혈압 환자에서 최종적 치료로 알려져 있다. 본 41세 남자 환자는 동맥관 개존증에 의한 이차성 폐동맥 고혈압으로 진단되었으며 심도자 검사 결과 대동맥압 130/80 mean 100 mmHg, 폐동맥 130/80 mean 109 mmHg, 우심실 130/20 mmHg, 우심방 mean 20 mmHg이었고 우측 폐동맥의 직경이 7.5 cm로 심한 확장소견이 있어 심폐이식을 필요로 하였다. 장기 공여자는 24세 남자 환자로 교통사고에 의해 뇌 경막하 출혈로 타 병원에서 뇌사 판정을 받았다. 수술은 심폐 바이페스하에 동맥관 개존증을 결찰하고 심폐이식술을 시행하였다. 수술 후 1일째 호흡기를 이탈하였으며 3일째 일반 병실로 전원되었고 33일째 퇴원하였으며 41일째 시행한 심근과 폐 조직 검사 소견에서 거부 반응은 없었다.
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.
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.
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.