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버미큘라이트 및 레드머드를 활용한 산화마그네슘 경화체의 공극 특성
임현웅 ( Lim Hyun-ung ),이원규 ( Lee Won-gyu ),이상수 ( Lee Sang-soo ),송하영 ( Song Ha-young ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.2
Radon is one of the substances that pollute the indoor air and is classified as a first-level carcinogen by the International Agency for Research on Cancer(IARC) together with asbestos, and it is reported that it can cause lung cancer. The World Health Organization(WHO) reports that lung cancer is the second leading cause of lung cancer, and 6-15% of lung cancer patients report lung cancer caused by radon. Radon occurs in cracks in concrete and aged buildings, and is detected in soil, rocks, groundwater, and so on. It is a colorless, odorless and tasteless gas which is adsorbed to dust in the air and enters through human respiratory system. This study used vermiculite (expanded vermiculite), which has excellent ion exchange ability and a large number of pores, and industrial by - product red mud which has heavy metal adsorption ability, in order to adsorb radon. A matrix capable of adsorbing radon was prepared, and the characteristics of each material were compared and analyzed.
임현웅 ( Lim Hyun-ung ),김헌태 ( Kim Heon-tae ),권오한 ( Gwon Oh-han ),이상수 ( Lee Sang-soo ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2
This study is a absorbing Radon gas to occur indoor or outdoor. As a absorbent Radon gas, making cementless abso rbent matrix that accomplish experiment. In other to accomplish this experiment, Confirming Radon gas release ratio and accurating absorption, reduction of a half-life that 3,8 days from Radon gas source, we need to decide Radon absorbent experiment method. So, we accomplish to find Radon measurement method considering properties and a half-life that 3,8 days from Radon gas source. As the experimental factors, After stabilizing of Radon gas source and so on, we accomplish the experiment that is there or not and seal of Radon source.
버미큘라이트 및 안트라사이트를 활용한 산화마그네슘 경화체의 열전도율 특성
임현웅 ( Lim Hyun-ung ),권오한 ( Gwon Oh-han ),편수정 ( Pyeon Su-jung ),이동훈 ( Lim Gguk-jeong ),이상수 ( Lee Sang-soo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
The study conducted a thermal conductivity test of magnesium oxide to manufacture boards using absorbent to produce board of radon gas molecules that are absorbed into the indoor air pollutants, which are currently in question, among other indoor air pollutants. Using material are the vermiculite and anthracite, in case of the vermiculite, which results in large porosity due to the expansion, in case of the anthracite, which characteristic generates pore on the matrix. As a result of the experiment, the lowest value was given to 0.6161 kcal/mh℃ which adding vermiculite 10% and anthracite 40%. However, adding vermiculite 40% and anthracite 10%, slightly higher 0.7229 kcal/mh℃, it is deemed the anthracite has more porosity than the vermiculite and, it judged that pore occurrence during the mixing process, appeared that the heat conductivity go down.
편수정 ( Pyeon Su-jeong ),임현웅 ( Lim Hyun-ung ),이상수 ( Lee Sang-soo ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1
Recently, as the interest of the government and the public on energy saving has increased, the airtightness of buildings has been improved to improve the insulation performance of buildings. However, indoor air pollution due to increase of pollution source in indoor space and lack of ventilation is increasing and interest in indoor air quality is increasing. In 2003, the Ministry of Environment enacted and promulgated the Act on Indoor Air Quality Control in Multi-use Facilities. Radon is a naturally occurring radioactive inert gas with colorless, tasteless and odorless nature. The concentration is high in a room where radon can not escape. Although lononggas is naturally occurring, it is not interested in living environment, but it is easily inhaled through human body through respiration and causes lung cancer in long-term exposure. Therefore, this study intends to carry out an experiment for the reduction of radon gas, which is the first carcinogen in indoor air pollution sources.
권오한 ( Gwon Oh-han ),임현웅 ( Lim Hyun-ung ),이동훈 ( Lee Dong-hoon ),이상수 ( Lee Sang-soo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
In recent years, it has been urgently required to develop and study a product that adsorbs and reduces lardon gas due to the risk of lardon gas in Korea. Therefore, this study develops a board for adsorbing lardon gas into the inside and outside of the room. The thermal conductivity was measured in order to carry out an adiabatic test for satisfying the following conditions. Experimental level and factors were substituted with silica gel. In addition, silica gel was used by dry mixing and prewetting, and 10, 20, and 30% of cement was substituted for each. As a result of the test, the thermal conductivity decreased to 0.45 W/mK with increasing the amount of replacement, and reached a similar level when compared with diatomite.
습식비중분리시스템을 활용한 순환잔골재의 품질특성에 관한 연구
이상수(Lee Sang-Soo),임현웅(Lim Hyun-Ung),송하영(Song Ha-Young) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.5
This study aims to develop washing method system to produce quality recycled fine aggregate in order to reduce environmental load caused by waste concrete, which accounts for most construction waste, and fundamentally resolve the problem of imbalance between supply and demand of fine aggregate in construction industry. According to the evaluation on the quality of each recycled fine aggregate produced from different quality of mixed construction waste, the quality of most recycled fine aggregate exceeded the domestic standard (KS F 2573). It means successful development of the washing method system to effectively produce recycled fine aggregate whose quality is similar to natural fine aggregate used for reinforced concrete. However, the recycled fine aggregate based on washing method does not meet the overseas reinforced concrete quality standard (JIS A 5021-H) in terms of absolute dry density and absorption rate, making it unsuitable to replace natural fine aggregate. Therefore, it is imperative to develop the technology to get rid of mortar on the recycled fine aggregate in order to meet the standard of JIS A 5021-H. In addition, developing technology to improve productivity is a prerequisite for a wide use of the washing method system developed in this study.
권오한 ( Gwon Oh-han ),임현웅 ( Lim Hyun-ung ),이상수 ( Lee Sang-soo ) 한국건축시공학회 2017 한국건축시공학회지 Vol.17 No.1
라돈은 토양이나 암석, 지하수 안에서 우라늄(U-238)이 핵분열 할 때 발생하는 무색, 무취, 무미의 반응성이 거의 없는 비활성 단원자 분자 기체로 반감기 동안 연쇄적으로 붕괴하는데 이때 방사성 핵종(Bi, Po, Pb)이 만들어 지며 이를 자손핵종이라 한다. 이는 공기 중의 먼지 등에 흡착하여 사람이 호흡할시 폐에 흡착하여 붕괴하는데 여기서 발생하는 알파선에 장기간 피폭하면 폐암을 유발하는 것으로 밝혀졌다. 이에 따라 실내공기질에 관한 기준과 연구가 지속적으로 시행되고 있는 실정이다. 본 연구는 실내 라돈가스를 최소화 하고 저감하기 위한 무시멘트계 흡착재를 연구개발 하기위한 기초실험으로 흡착재의 첨가량에 따라 유동성 및 강도는 저하되는 경향을 보였지만, 이는 흡착재의 밀도 및 공극에 의한 것으로 판단되며, 라돈가스 농도의 경우 첨가량증가에 따라 감소하는 경향을 보였다. 향후 가장 적합한 흡착재를 활용하여 보다 세밀하고 다양한 실험이 이루어져야 할 것으로 판단되며, 경화체상의 기초실험을 통해 추후 건축마감재에 관한 실험도 이루어져야 할 것이다. WHO reported that millions of people die every year because of diseases induced from environmental pollution. In 2012, approximately 7 million people were killed due to air pollution. Major cause of such pollution includes toxin, chemical waste, radiation and air pollution. Therefore, the significance and interest to indoor air quality has been continuously increased . Especially, the interest in radon, the ARC group 1 carcinogen, is rapidly increasing, and banning the use of construction materials that release radon, repairing aged buildings, and developing ventilators. To reduce the level of radon gas was inflowed to indoors and outdoors, this study is to research and develop a radon gas absorption board using absorbents. The absorbents utilized to absorb the radon gas were porous diatomite, natural zeolite, 4A zeolite and 13X zeolite and employed bentonite and illite, montmorillonites with the property of exchanging anions. As the main binder, magnesium oxide was used, with a content of 25% magnesium chloride.