농촌지역의 건설폐기물 중간처리 사업장 주변 환경 영향 평가 및 개선방안 연구

장경필,김병윤 한국농촌건축학회 2024 농촌건축 : 한국농촌건축학회논문집 Vol.26 No.2

In order to analyze the impact of fine dust generated from a construction waste intermediate processing site on the surrounding areas, diverse types of samples were collected from inside the site and surrounding areas. The impact analysis results of samples are as follows. (1) Compared to the air quality management standards by the Ministry of Environment, the concentration of fine dust within the site was 30 to 46% for PM10 and 14 to 42% for PM2.5, which was not much different from the general air quality level. (2) It was found that PM10 within the site may have a partial effect on the air quality, but when the blocking facilities in the site, wheel washing facilities at vehicle entry and exit route, and sprinkler during working were maintained, the impact on the nearby area was not high. (3) In the case of PM2.5, its concentration was influenced more by the exhaust fumes from work vehicles than fine dust generated during construction waste processing. Since the PM2.5 concentrations in the site and surrounding area were not much different from the general air quality, there was little correlation with the work impact of construction waste intermediate processing sites. (4) Pb, an indicator of heavy metal components, was within 50ng/㎥ in all three sites, which was 10% of the domestic management standard and equivalent to the general air quality level. The complaints from residents in nearby areas were filed using indicators based on visual and experiential information in their daily lives, so even if the survey results of environmental impact by the construction intermediate waste processing site are lower than the standard, nearby residents can feel it better than such numerical information. Therefore, specific activities to reduce find dusts should be continuously continued.

SCE구축을 통한 SCM 완성사례

장경필,Jang, Gyeong-Pil 한국물류협회 2005 물류혁신 컨퍼런스 Vol.13 No.1

중력식 안벽 구조물의 증심 시공을 위한 가소성 그라우트의 충진성능 평가

장경필,유용선,권승희,한운우,오명학,Jang, Kyong-Pil,Ryu, Yong-Sun,Kwon, Seung-Hee,Han, Woon-Woo,Oh, Myong-Hak 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 논문집 Vol.21 No.6

최근 수송선박의 대형화에 따라 기존 항만 시설의 접안 깊이 확보에 대한 필요성이 증가하고 있다. 증심공법은 기존 항만시설의 접안 깊이를 확보하는 방법으로, 필요 깊이만큼 사석마운드를 굴착한 후 그라우팅을 통해 보강한다. 이 연구에서는 사석마운드 보강을 위한 그라우팅 재료로 가소성 그라우트를 사용할 경우 보강성능과 충진성능에 대해 검토하고자 하였다. 2가지 가소성 그라우트 배합에 대해 압축강도실험을 수행하여 지반보강효과를 검토하였고, 직경 400 mm, 높이 530 mm 크기의 실린더형 실험체 5개를 제작해 충진성능을 평가하였다. 구조물의 안전성 확보를 위해 요구되는 개량체의 소요강도는 6 MPa이며, 이 연구에서 사용한 가소성 그라우트 배합 모두 재령 7일에 9 MPa 이상으로 소요강도를 만족하는 것으로 확인되었다. 충진성능 평가 실험체의 충진상태를 육안으로 관찰한 결과, 이 연구에서 목표로 설정한 사석 채 움 높이까지 가소성 그라우트가 잘 채워지는 것을 확인하였다. Recently, as the size of transportation vessels has increased, there is a growing need for securing the front-water depths of existing port facilities. The method of deepening front-water depth is securing the depth of the port facility, and it is reinforced by grouting after excavating the rubble-mound to the required depth. The purpose of this study is to investigate the reinforcing performance and filling performance of thixotropic grout as a grouting material for reinforcing rubble-mound. Compressive strength tests were carried out for two types of thixotropic grout, and 5 specimens with a diameter of 400 mm and a height of 530 mm were manufactured and evaluated for filling performance. The required strength of reinforced rubble-mound required to ensure the safety of the structure is 6 MPa. All the thixotropic grouts used in this study were found to satisfy the required strength over 9 MPa at 7 days of age. As a result of visual observation of filling state of the filling performance test specimens, it was confirmed that the thixotropic grout was well filled up to the desired fillet height.

해외시장 진출을 위한 고밀도 섬유 혼입 압출성형 패널의 불연성능 향상기술 제안

장경필,송태협,Jang, Kyong-Pil,Song, Tae-Hyeb 한국건설순환자원학회 2021 한국건설순환자원학회지 Vol.16 No.4

건설폐기물 중간처리 사업장에서 발생하는 미세먼지의 특성 및 주변 환경 영향에 관한 연구

장경필,송태협,김병윤 대한건축학회지회연합회 2021 대한건축학회연합논문집 Vol.23 No.1

To evaluate fine dust amount occurring from a construction waste intermediate treatment plant and seek measures to control fine dust occurrence, this study analyzed the fine dust occurrence situations and characteristics. The analysis results are as follows: 1) As a result of measuring fine dust using a light scattering method, PM10 showed relatively higher values in the area where there was a lot of heavy equipment access/exit and the area where comminution work was carried out and the surrounding area in terms of boundary area of the plant. Therefore control to prevent external fine dust from scattering was necessary. PM2.5 was measured at the atmosphere concentration level, and so there was almost no effect of PM2.5. 2) Concerning PM10 whose fine dust scattering effects were on the surrounding areas during the operation of the plant, a trend of fine dust concentration decrease was shown, as separation distance increased, but the high values of PM10 were shown in the areas adjacent to roads or areas where vehicles traveled, despite far separation distance. As for PM2.5, constant values were shown, irrelevant of distance, and so the operation of the intermediate treatment plant hardly affected the concentration in the surrounding area. 3) Regarding the heavy metal analysis result, the concentration of Pb was measured at 25~40ng/m3, which revealed the concentration value similar to the Pb concentration revealed in the Monthly Report of Atmospheric Environment. 4) The analysis result of SEM-EDX showed no difference of components before and after the operation.

농촌지역 건설폐기물 중간처리 사업장에서 발생하는 미세먼지의 발생 현황 및 인근 지역에 미치는 영향 연구

장경필,박지선,김병윤 한국농촌건축학회 2023 농촌건축 : 한국농촌건축학회논문집 Vol.25 No.4

In this study, the status and characteristics of fine dust and its impact on neighboring areas were investigated to proactively respond to the government's environmental regulations expected in the future and to minimize the damage by the fine dust generated at construction waste intermediate treatment plants. In addition, since there are no such plants that can affect the surroundings with no houses or other waste treatment sites nearby, an independently located construction waste intermediate treatment plant was selected to compare the characteristics of fine dust with that from the construction waste intermediate treatment sites located in the downtown area. The conclusions of the study are as follows. (1) The measurement results of PM10 at 4 points in the plant showed that the location where the crushing facility was operating had an elevated level of fine dust at 80μg/㎥ on average and a maximum of 124μg/㎥, and the level rose to 110μg/㎥ at points where vehicles frequent. (2) The PM2.5 measurement results inside the plant showed that the average concentration of the reference point was 16μg/㎥ and the maximum value was 20μg/㎥, which was distributed within the management standard. (3) It was found that the average concentration of PM10 in the nearby area ranged from 28 to 38μg/㎥, which was similar to or lower than 36μg/㎥ of the reference point. Therefore, the concentration of the fine dust generated in the plant had a negligible effect on the increase in concentration of fine dust in nearby areas. (4) The heavy metal contents were measured from the filter paper collected from the plant. The PM10 was found to be about 14 to 26ng/㎥, and PM 2.5 was 25 to 28ng/㎥, which was the average of domestic atmospheric concentrations. (5) The SEM-EDX analysis results showed that the PM10 contained Si and O around 40% similarly for both. The SiO2, a component of silica occupied the most and C was present as CaCO3, which was assumed to be a limestone component. The remaining components included NaO, Al2O3, and CaO as trace oxides. (6) The SEM-EDX analysis results showed that the PM 2.5 contained 5 to 7% of Cl, which is a chlorine ion, and a small amount of K was detected at 2.51% in the sample from the shutdown plant.

마 섬유 혼입에 따른 고밀도 섬유 시멘트 복합체의 불연 특성 연구

장경필,송태협 한국건설순환자원학회 2022 한국건설순환자원학회 논문집 Vol.10 No.3

건축자재에서 사용되는 보강 섬유의 기능은 휨하중에 대한 저항력 유지, 건조 수축에 의한 균열 방지 기능 등을 목적으로하고 있다. 고밀도 섬유 시멘트 복합체는 주로 선형의 판재에 사용되는 것으로 휨 저항력을 높이기 위하여 사용한다. 따라서, 인장성, 시멘트 수화물과의 결합력, 내알칼리성 등이 요구된다. 최근 불연성능 기준이 강화되어 고온 가열 시 불꽃 발생을최소화해야 하는 기능이 추가되었다. 따라서 유기 섬유의 사용이 제한되고 있다. 본 연구에서는 보강 섬유로 사용하는 폴리프로필렌 섬유를 내열성이 우수한 마 섬유로 대체하여 사용하는 연구를 수행하였다. 마 섬유는 내열성이 우수하고 시멘트와의 친화력이 좋으며 알칼리 저항력 또한 우수하다. 기존의 배합에서 사용하는 폴리프로필렌 섬유의 부피 총량을 기준으로 마 섬유를 대체하여 사용하여 불연성능을 비교 평가하였으며, 휨강도 등 기본 물리적특성 시험을 진행하였다. 길이 7 mm의 마 섬유를 질량비 2 %, 3 %를 사용하여 불연 및 물리적 특성 시험을 수행한 결과불꽃의 잔존 시간은 전혀 없는 것으로 나타났으며, 휨강도는 기존 폴리프로필렌 섬유의 95 % 수준까지 확보가 가능한 것으로확인되었다.

정량적 예측 기반 콘크리트 펌프압송 성능 설계

장경필 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1

전자파 차폐 수성도료를 활용한 주거 공간 내 전자파 제어 효과 분석

장경필,박지선 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.10

강한 강도의 전자파 노출에 대해서는 인체보호기준을 별도로 마련하여 규제하고 있으나 일상생활에서 발생하는 미약한 강도의 전자파 노출에 대한 인체 유해성에 대해서는 연구자들간의 논란이 있는 상태이다. 따라서 세계보건기구(World Health Organization) 산하 국제암연구소(International Agency for Research Cancer)에서도 일상생활에서 발생하는 전자파를 암 유발 가능 그룹(Possibly Carcinogenic to Human)으로 분류하여 주의하도록 권고하고 있다. 그러나 스마트 도시의 도입 및 IoT 환경 조성이 가속화됨에 따라 주거공간 내 재실자의 전자파에 대한 노출정도는 지속적으로 증대될 것으로 예상된다. 그러므로 소아청소년이나 노약자와 같이 실내 거주 시간이 상대적으로 길며 건강 취약자를 대상으로 한 경우에는 예방적인 차원에서의 주거환경 내의 전자파 제어를 위한 연구가 필요하다. 이에 이 연구에서는 신축 건축물 뿐만 아니라 기존의 건축물에도 손쉽게 적용할 수 있는 전자파 차폐도료를 활용한 전자파 제어효과를 분석하였다. 이를 위하여 무도장인 상태와 2종의 전자파 차폐도를 적용한 상태에서 전자파의 발생 크기를 측정하고 저감효과를 분석하였다. 분석결과 전자파 발생원으로부터 300 mm의 거리에서의 전자파 차감효과는 국내 개발 시제품의 경우에는 약 20%의 차감효과가 해외 상용제품의 경우에는 약 30%의 저감 효과를 확인할 수 있었다. 「Electromagnetic Field Exposure Guideline for Human Protection」have been established to regulate the exposure to high-intensity electromagnetic waves. However, the potential health hazards associated with exposure to low-intensity electromagnetic waves that occur in daily life remain a subject of debate among researchers. Therefore, the International Agency for Research on Cancer, a subsidiary of the World Health Organization, has classified everyday electromagnetic field exposure as 'Possibly Carcinogenic to Humans,' recommending caution. However, as the adoption of smart cities and the development of IoT environments accelerate, it is anticipated that the level of exposure to electromagnetic waves for occupants within residential spaces will continue to increase. This research focused on preventative measures for controlling electromagnetic wave exposure in residential environments, particularly for vulnerable populations such as children, adolescents, the elderly, and individuals with compromised health, who spend relatively longer periods indoors. In this study, we analyzed the efficacy of electromagnetic wave control using easily applicable electromagnetic shielding paints, not only in newly constructed buildings but also in existing structures. By measuring the emission levels of electromagnetic waves at a distance of 300 mm from the source, we examined the attenuation effects of two types of shielding coatings compared to a non-shielded condition. The results showed a reduction effect of approximately 20% for domestically developed prototype products, while commercial overseas products exhibited a reduction effect of approximately 30%.

백석면의 무해 섬유화 처리 방법과 고밀도 압출성형 패널 활용 연구

장경필(Kyong-Pil Jang),김태형(Tae-Hyoung Kim),송태협(Tae-Hyeob Song) 한국건설순환자원학회 2021 한국건설순환자원학회 논문집 Vol.9 No.2

석면 건축자재 최종 처리 방법은 폐기물 관리법에 의하여 지정폐기물 매립장에 매립 처리 하여야 한다. 그러나 2044년까지 연간 40만 톤 이상 배출이 예상되는 석면 폐기물을 전량 매립 처리하기에는 국내 지정폐기물 매립장 확보가 어려운 상황이다. 본 연구는 백석면을 3∼7% 함유한 밀도 1.0∼1.2g/cm³의 천장재를 대상으로 무해화 처리를 실시하고 이를 압출성형 패널의 보강섬유로 활용한 것이다. 옥살산 30%와 이산화탄소를 이용한 반응 공정을 통하여 무해화 처리가 된 것을 확인하였으며, 압출성형 후에도 이러한 무해화 성질은 유지하는 것으로 확인되었다. 다만, 석면 섬유의 완전한 무해화 처리를 위하여 초기 1mm 미만으로 분쇄를 실시함에 따라 섬유에 따른 보강성능 역할이 높지 않은 것으로 나타났다. 따라서 압출성형 공정에서 무해화 석면 섬유를 활용할 경우에는 보강성능 보완이 가능한 5mm 길이 이상의 섬유를 보완하여 사용하여야 할 것으로 사료된다. The final disposal method for asbestos building materials is to be landfilled at a designated waste landfill in accordance with the Waste Management Act. However, it is difficult to secure a domestic designated waste landfill site to landfill the entire amount of asbestos waste, which is expected to emit more than 400,000 ton/year by 2044. In this study, a detoxification treatment was performed on a ceiling tex with a density of 1.0 to 1.2g/㎤ containing 3 to 7% of chrysotile, and it was used as a reinforcing fiber for extruded panels. It was confirmed that asbestos components were detoxified through the reaction process using 30% oxalic acid and carbon dioxide, and it was recognized that these detoxifying properties were maintained even after extrusion molding. However, it was found that milling to a fiber size of less than 1mm for complete detoxification of asbestos resulted in a decrease in reinforcing performance. Therefore, in the case of using detoxified asbestos fibers in the extrusion molding process, it is considered desirable to add fibers with a length of 5mm or more to improve the reinforcing performance.