Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Physical Properties of Lightweight Foamed Concrete with Flame Resistant EPS Waste

난연성 EPS 폐기물을 혼입한 경량기포 콘크리트의 물리적 특성

  • Eo, Seok-Hong (School of Civil, Environmental and Chemical Engineering, Changwon National University) ;
  • Son, Ji-Woon (Department of Civil Engineering, Changwon National University)
  • 어석홍 (창원대학교 토목환경화공융합공학부) ;
  • 손지운 (창원대학교 토목공학과)
  • Received : 2016.09.27
  • Accepted : 2017.02.03
  • Published : 2017.02.28
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Abstract

The physical properties of lightweight foamed concrete mixed with EPS waste and flame resistant EPS waste were investigated. For this purpose, the main variables considered were a cement content of 300 and $400kgf/m^3$ 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 A 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 conductivity 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.

본 논문에서는 경량기포 콘크리트에 EPS 폐기물과 난연성 EPS 폐기물 보강재를 각각 혼입해 물성 특성을 연구하였다. 물시멘트비는 50%로 고정시켰으며 단위시멘트량은 300, $400kgf/m^3$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, 열전도율 및 흡수율을 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, 0.6품을 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.

Keywords

Acknowledgement

Supported by : 창원대학교

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