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Evaluation of Decreasing Concentration of Radon Gas for Indoor Air Quality with Magnesium Oxide Board using Anthracite

안트라사이트를 활용한 산화마그네슘 보드의 실내 공기질 중 라돈가스 농도 저감 평가

  • Pyeon, Su-Jeong (Department of Architectural Engineering, Hanbat National University) ;
  • Lim, Hyun-Ung (Department of Architectural Engineering, Hanbat National University) ;
  • Lee, Sang-Soo (Department of Architectural Engineering, Hanbat National University)
  • Received : 2017.11.30
  • Accepted : 2018.01.16
  • Published : 2018.02.20

Abstract

Radon gas, which is present on the earth, is a primary carcinogen released from rocks, soil, building materials, etc., and exists as a unique gas phase. In order to solve the risk of radon gas, we evaluated the basic performance which can be used as indoor finishing materials in addition to the radon gas reduction properties of the matrix using anthracite. An anthracite used as a conventional filter material was used to produce a matrix, and a test was conducted to replace the gypsum board, which is one of the building materials used in the existing room. As the anthracite replacement ratio increases, flexural failure load strength increases and thermal conductivity tends to decrease. Depending on the thickness of the board, the reduction performance of radon gas shows a slight difference.

지구상에 존재하는 라돈가스는 바위, 토양, 건축자재 등에서 방출되는 1급 발암물질로 유일한 기체상으로 존재하고 있다. 공기에 비해 무겁고 분자량이 커 하부에 가라앉아 있지만 이동성이 크다. 라돈가스는 특성상 실외에서 대기에 확산되지만 밀폐되고 환기가 어려운 실내공간의 농도는 수천 배까지 증가할 수 있다. 이러한 라돈가스의 위해성을 해결하기 위해 안트라사이트를 활용한 경화체의 라돈가스 저감 특성과 더불어 실내 마감재로 사용할 수 있는 기초 성능평가를 진행하였다. 기존 여과재로 사용된 안트라사이트를 사용하여 경화체를 제작하였으며, 기존 실내에서 사용된 건축자재 중 라돈을 방출하는 석고보드를 대체할 수 있는 시험을 진행하였다. 결합재로는 경소 마그네시아를 사용하였고, 경소마그네시아의 경화를 위해 염화마그네슘을 사용하였다. 흡착재로 사용된 안트라사이트의 치환율은 0, 10, 20, 30, 40, 50 (%)로 총 6수준으로 진행하였으며,W/B는 40%로 고정하였다. 시험항목은 휨파괴 하중, 열전도율, 라돈가스 농도를 진행하였으며, 양생조건은 항온항습 양생(습도 $80{\pm}5%$, 온도 $20{\pm}2^{\circ}C$)으로 진행하였다.

Keywords

References

  1. Ju YJ. The measurement of radon-222 concentration for release gas into the atmosphere from the building material [master's thesis]. [Seoul (Korea)]: Chosun university; 2012. 67 p.
  2. Indoor radon reduction guidelines [Internet]. Korea: The Association; c1980-2018. Ministry of Environment. Avaliable from:https://www.keco.or.kr/cmm/fms/FileDown.do?fileid=FILE_000000001000013&fileSn=0
  3. Indoor airborne radon measurement instructions [Internet]. Korea: The Association; c1980-2018. Ministry of Environment. Avaliable from: http://webbook.me.go.kr/DLi-File/096/012/5622317.pdf. 2000.5.No.202
  4. Pyeon SJ, Gwon OH, Kim WJ, Lee DH, Lee SS. Strength properties of light-burned magnesia matrix mixing anthracite. Preceeding of Architectural institute of korea; 2017 Apr 26-29; Haevichi Jeju, Korea. Seoul (Korea); Korea concrete institute; 2017. p. 961-2.
  5. Pyeon SJ, Gwon OH, Kyoung IS, Lee DH, Lee SS. Heat insulation properties of lightweight magnesia matrix according to mixing ratio of anthracite. Preceeding of Korea institute of building construction; 2017 May 17-19; The-K Gyeongju Hotel, Korea. Seoul(Korea); Korea institute of building construction; 2017. p. 113-4.
  6. Pyeon SJ, Kim WJ, Lee SS. Density and water adsorption properties of matrix mixing with powdered active carbon according to binder type. Preceeding of Korea institute of building construction; 2017 Nov 9-10; Korea Maritime University, Busan, Korea. Seoul(Korea); Korea institute of building construction; 2017. p. 111-2.
  7. Jang M. A study on the evaluation of the concentration of indoor radon due to building materials [master's thesis]. [Seoul (Korea)]: Seoul university; 2003. 47 p.
  8. Jung JH. Time and spatial distribution characteristics between 222-Radon and its daughters Concentrations and Correlations Analysis [master's thesis]. [Seoul (Korea)]: Seoul national university of technology; 2009. 78 p.
  9. Park BY. A study on cadmium adsorption using natural filtering matters. A Publication of the korean institute of environmental and hygienic science hayang Korea. 1992 Dec;01(2):85-95.
  10. Lim JS. Heupchak gwahak gonghakgwa heupchakje. [Adsorption science for engineering and adsorbents]. Seoul(Korea): Naeha; 2012. 633 p. Korea.
  11. Bae SD, Son HJ, Jung CW. Removal characteristics of chloral hydrate by activated carbons and biofiltration. Korean society of environmental engineers. 2008 Feb;30(2)218-24.
  12. Gwon OH, LIm HY, Lee SS. Experiments on radon gas emissions of natural mineral and plaster. Preceeding of Architectural Institute of Korea. 2016 Oct 4-6; BEXCO Busan, Korea. Seoul(Korea): Architectural Institute of Korea; 2016. p. 1566-7.